AI Trajectory

Trajectory: (Expand/Collapse All)
Seq	Timestamp	Type	Name	Duration
0/0	2026/08/01 15:48	flow	patch-triage	2m Args: null Results: { "EnableConfigs": [ "LRU_GEN", "LRU_GEN_ENABLED", "MEMCG" ], "FocusSymbols": [ "try_to_free_pages", "try_to_free_mem_cgroup_pages", "user_proactive_reclaim" ], "Reasoning": "The patch modifies the Multi-Gen LRU (MGLRU) page reclaim logic in the core memory management subsystem. It changes how the minimum generation sequence is incremented, how folios are scanned and isolated, and the conditions for running aging. These are functional changes to reachable core kernel logic that should be fuzzed.", "WorthFuzzing": true }
1/1	2026/08/01 15:48	action	read-patch-diff	0m Args: null Results: { "PatchDiff": "commit 49d388c9cbe725f42b50cee9e52614953b235c42\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Sat Aug 1 15:48:49 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/include/linux/mmzone.h b/include/linux/mmzone.h\nindex a26c8b8552222..233d2006a5417 100644\n--- a/include/linux/mmzone.h\n+++ b/include/linux/mmzone.h\n@@ -552,10 +552,8 @@ enum {\n * The youngest generation number is stored in max_seq for both anon and file\n * types as they are aged on an equal footing. The oldest generation numbers are\n * stored in min_seq[] separately for anon and file types so that they can be\n- * incremented independently. Ideally min_seq[] are kept in sync when both anon\n- * and file types are evictable. However, to adapt to situations like extreme\n- * swappiness, they are allowed to be out of sync by at most\n- * MAX_NR_GENS-MIN_NR_GENS-1.\n+ * incremented independently. For both file and anonymous memory, the minimum\n+ * generation must be at least MIN_NR_GENS.\n \n The number of pages in each generation is eventually consistent and therefore\n * can be transiently negative when reset_batch_size() is pending.\ndiff --git a/mm/vmscan.c b/mm/vmscan.c\nindex 17d2b793cbfc4..396e47e327bc8 100644\n--- a/mm/vmscan.c\n+++ b/mm/vmscan.c\n@@ -3982,16 +3982,6 @@ static void try_to_inc_min_seq(struct lruvec lruvec, int swappiness)\n \tif (!seq_inc_flag)\n \t\treturn;\n \n-\t/ see the comment on lru_gen_folio /\n-\tif (swappiness \u0026\u0026 swappiness \u003c= MAX_SWAPPINESS) {\n-\t\tunsigned long seq = lrugen-\u003emax_seq - MIN_NR_GENS;\n-\n-\t\tif (min_seq[LRU_GEN_ANON] \u003e seq \u0026\u0026 min_seq[LRU_GEN_FILE] \u003c seq)\n-\t\t\tmin_seq[LRU_GEN_ANON] = seq;\n-\t\telse if (min_seq[LRU_GEN_FILE] \u003e seq \u0026\u0026 min_seq[LRU_GEN_ANON] \u003c seq)\n-\t\t\tmin_seq[LRU_GEN_FILE] = seq;\n-\t}\n-\n \tfor_each_evictable_type(type, swappiness) {\n \t\tif (min_seq[type] \u003c= lrugen-\u003emin_seq[type])\n \t\t\tcontinue;\n@@ -4727,7 +4717,8 @@ static bool isolate_folio(struct lruvec lruvec, struct folio folio, struct sca\n \n static int scan_folios(unsigned long nr_to_scan, struct lruvec lruvec,\n \t\t struct scan_control sc, int type, int tier,\n-\t\t struct list_head list, int isolatedp)\n+\t\t struct list_head list, int isolatedp,\n+\t\t bool exhausted)\n {\n \tint i;\n \tint gen;\n@@ -4738,15 +4729,18 @@ static int scan_folios(unsigned long nr_to_scan, struct lruvec lruvec,\n \tint skipped = 0;\n \tunsigned long remaining = nr_to_scan;\n \tstruct lru_gen_folio lrugen = \u0026lruvec-\u003elrugen;\n+\tunsigned long min_seq = lrugen-\u003emin_seq[type];\n \n \tVM_WARN_ON_ONCE(nr_to_scan \u003e MAX_LRU_BATCH);\n \tVM_WARN_ON_ONCE(!list_empty(list));\n \n-\tif (get_nr_gens(lruvec, type) == MIN_NR_GENS)\n+\tif (get_nr_gens(lruvec, type) == MIN_NR_GENS) {\n+\t\texhausted = true;\n \t\treturn 0;\n+\t}\n \n-\tgen = lru_gen_from_seq(lrugen-\u003emin_seq[type]);\n-\n+next_gen:\n+\tgen = lru_gen_from_seq(min_seq);\n \tfor (i = MAX_NR_ZONES; i \u003e 0; i--) {\n \t\tLIST_HEAD(moved);\n \t\tint skipped_zone = 0;\n@@ -4788,6 +4782,14 @@ static int scan_folios(unsigned long nr_to_scan, struct lruvec lruvec,\n \t\t\tbreak;\n \t}\n \n+\t/\n+\t This generation is exhausted across all zones, but the scan\n+\t * target has not been reached yet. Continue with the next\n+\t * reclaimable generation.\n+\t /\n+\tif (i == 0 \u0026\u0026 ++min_seq + MIN_NR_GENS \u003c= lrugen-\u003emax_seq)\n+\t\tgoto next_gen;\n+\n \titem = PGSCAN_KSWAPD + reclaimer_offset(sc);\n \tmod_lruvec_state(lruvec, item, isolated);\n \tmod_lruvec_state(lruvec, PGREFILL, sorted);\n@@ -4796,6 +4798,11 @@ static int scan_folios(unsigned long nr_to_scan, struct lruvec lruvec,\n \t\t\t\tscanned, skipped, isolated,\n \t\t\t\ttype ? LRU_INACTIVE_FILE : LRU_INACTIVE_ANON);\n \n+\t/\n+\t This scan exhausted the reclaimable lists before reaching the\n+\t * scan target or accumulating enough isolated folios.\n+\t /\n+\texhausted = remaining \u003e 0 \u0026\u0026 isolated \u003c MIN_LRU_BATCH;\n \tisolatedp = isolated;\n \treturn scanned;\n }\n@@ -4839,35 +4846,42 @@ static int get_type_to_scan(struct lruvec lruvec, int swappiness)\n \treturn positive_ctrl_err(\u0026sp, \u0026pv);\n }\n \n+static inline bool is_single_type_reclaim(int swappiness)\n+{\n+\treturn swappiness == MIN_SWAPPINESS \|\|\n+\t swappiness == SWAPPINESS_ANON_ONLY;\n+}\n+\n static int isolate_folios(unsigned long nr_to_scan, struct lruvec lruvec,\n \t\t\t struct scan_control sc, int swappiness,\n \t\t\t struct list_head list, int isolated,\n \t\t\t int isolate_type, int isolate_scanned)\n {\n-\tint i;\n-\tint total_scanned = 0;\n+\tbool single_type = is_single_type_reclaim(swappiness);\n \tint type = get_type_to_scan(lruvec, swappiness);\n+\tint total_scanned = 0, scanned, tier;\n+\tbool tried = false, exhausted;\n \n-\tfor_each_evictable_type(i, swappiness) {\n-\t\tint scanned;\n-\t\tint tier = get_tier_idx(lruvec, type);\n+retry:\n+\ttier = get_tier_idx(lruvec, type);\n+\tscanned = scan_folios(nr_to_scan, lruvec, sc,\n+\t\t\t type, tier, list, isolated, \u0026exhausted);\n \n-\t\tscanned = scan_folios(nr_to_scan, lruvec, sc,\n-\t\t\t\t type, tier, list, isolated);\n+\ttotal_scanned += scanned;\n+\tif (isolated) {\n+\t\tisolate_type = type;\n+\t\tisolate_scanned = scanned;\n+\t\treturn total_scanned;\n+\t}\n \n-\t\ttotal_scanned += scanned;\n-\t\tif (isolated) {\n-\t\t\tisolate_type = type;\n-\t\t\tisolate_scanned = scanned;\n-\t\t\tbreak;\n-\t\t}\n-\t\t/\n-\t\t If scanned \u003e 0 and isolated == 0, avoid falling back to the\n-\t\t * other type, as this type remains sufficient. Falling back\n-\t\t * too readily can disrupt the positive_ctrl_err() bias.\n-\t\t /\n-\t\tif (!scanned)\n-\t\t\ttype = !type;\n+\t/\n+\t * We are running out of the current reclaim type. Fall back to\n+\t * the other type if allowed.\n+\t /\n+\tif (!tried \u0026\u0026 exhausted \u0026\u0026 !single_type) {\n+\t\ttype = !type;\n+\t\ttried = true;\n+\t\tgoto retry;\n \t}\n \n \treturn total_scanned;\n@@ -4969,21 +4983,82 @@ static int evict_folios(unsigned long nr_to_scan, struct lruvec lruvec,\n \treturn scanned;\n }\n \n+static inline bool swappiness_is_balanced(int swappiness)\n+{\n+\tint range = MAX_SWAPPINESS - MIN_SWAPPINESS;\n+\tint middle = MIN_SWAPPINESS + range / 2;\n+\n+\treturn swappiness \u003e= middle - range / 5 \u0026\u0026\n+\t swappiness \u003c= middle + range / 5;\n+}\n+\n+static bool lru_gen_imbalanced(struct lruvec lruvec, int type,\n+\t\tunsigned long max_seq, unsigned long min_seq,\n+\t\tstruct scan_control sc, int swappiness)\n+{\n+\tstruct lru_gen_folio lrugen = \u0026lruvec-\u003elrugen;\n+\tunsigned long young = 0, old = 0, seq;\n+\tunsigned long old_ratio, gb;\n+\n+\t/ Skip swappiness bias for single-type reclaim or balanced swappiness /\n+\tif (is_single_type_reclaim(swappiness) \|\| swappiness_is_balanced(swappiness))\n+\t\treturn false;\n+\n+\t/ More than two generations remain to reclaim /\n+\tif (min_seq + MIN_NR_GENS \u003c max_seq)\n+\t\treturn false;\n+\n+\t/\n+\t * Run aging if the only remaining reclaimable generation\n+\t * has few folios.\n+\t /\n+\tfor (seq = min_seq; seq \u003c= max_seq; seq++) {\n+\t\tint gen = lru_gen_from_seq(seq);\n+\t\tunsigned long size = 0;\n+\t\tint zone;\n+\n+\t\tfor (zone = 0; zone \u003c MAX_NR_ZONES; zone++)\n+\t\t\tsize += max(READ_ONCE(lrugen-\u003enr_pages[gen][type][zone]), 0L);\n+\n+\t\tif (seq + MIN_NR_GENS \u003e max_seq)\n+\t\t\tyoung += size;\n+\t\telse\n+\t\t\told += size;\n+\t}\n+\t/\n+\t * Copied from inactive_is_low(), but uses a higher old_ratio to\n+\t * make aging less aggressive.\n+\t /\n+\tgb = (young + old) \u003e\u003e (30 - PAGE_SHIFT);\n+\told_ratio = gb ? int_sqrt(10 gb) : 1;\n+\told_ratio = MAX_NR_GENS;\n+\treturn young \u003e old old_ratio;\n+}\n+\n static bool should_run_aging(struct lruvec lruvec, unsigned long max_seq,\n \t\t\t struct scan_control sc, int swappiness)\n {\n+\tint type = get_type_to_scan(lruvec, swappiness);\n \tDEFINE_MIN_SEQ(lruvec);\n \n \t/* have to run aging, since eviction is not possible anymore /\n \tif (evictable_min_seq(min_seq, swappiness) + MIN_NR_GENS \u003e max_seq)\n \t\treturn true;\n \n+\t/ run aging if the preferred type is exhausted for extreme swappiness /\n+\tif (min_seq[type] + MIN_NR_GENS \u003e max_seq \u0026\u0026 !swappiness_is_balanced(swappiness))\n+\t\treturn true;\n+\n \t/ try to avoid aging, do gentle reclaim at the default priority /\n \tif (sc-\u003epriority == DEF_PRIORITY)\n \t\treturn false;\n \n \t/ better to run aging even though eviction is still possible /\n-\treturn evictable_min_seq(min_seq, swappiness) + MIN_NR_GENS == max_seq;\n+\tif (evictable_min_seq(min_seq, swappiness) + MIN_NR_GENS == max_seq)\n+\t\treturn true;\n+\n+\t/ Run aging if the preferred type is severely imbalanced across gens /\n+\treturn lru_gen_imbalanced(lruvec, type, max_seq, min_seq[type], sc, swappiness);\n }\n \n static long get_nr_to_scan(struct lruvec lruvec, struct scan_control *sc,\n" }
2/1	2026/08/01 15:48	agent	patch-evaluator	2m Model: best-expensive Args: null Results: { "EnableConfigs": [ "LRU_GEN", "LRU_GEN_ENABLED", "MEMCG" ], "FocusSymbols": [ "try_to_free_pages", "try_to_free_mem_cgroup_pages", "user_proactive_reclaim" ], "Reasoning": "The patch modifies the Multi-Gen LRU (MGLRU) page reclaim logic in the core memory management subsystem. It changes how the minimum generation sequence is incremented, how folios are scanned and isolated, and the conditions for running aging. These are functional changes to reachable core kernel logic that should be fuzzed.", "WorthFuzzing": true } Instruction: You are an expert Linux kernel maintainer. Your job is to review a provided patch series and determine if it makes functional changes to the kernel that should be fuzzed. IMPORTANT: The changes have ALREADY been applied and committed as the HEAD commit in your workspace. Do NOT rely on your internal knowledge of the kernel. You must actively use your code access tools to examine the actual source code and confirm any assumptions. Return WorthFuzzing=false if the patch only contains: - Modifications to Documentation/, Kconfig files, or code comments. - Purely decorative changes, such as logging (e.g., pr_err, printk) or tracepoints. - Changes to numeric constants or macros that do not functionally alter execution flow. - Code paths that are impossible to reach in virtualized environments like GCE or QEMU, even when utilizing software-emulated hardware (e.g., usb gadget, mac80211_hwsim). - Code in vendor-specific PCIe switch, SmartNIC, or GPU drivers (e.g., mlxsw, pds_core, qed, ionic, amdgpu) that require physical PCIe hardware cards not emulated in standard QEMU. - Driver .remove, .shutdown, or pci_unregister_driver teardown callbacks (e.g., igb_remove) that are executed only during PCI hot-unplug or sysfs driver unbind operations. If it modifies reachable core kernel logic, drivers, or architectures, use your code search tools to verify the code can be executed, then return WorthFuzzing=true. When returning WorthFuzzing=true, you MUST ALSO: 1. Extract any specific kernel functions that should be heavily fuzzed into FocusSymbols. Avoid listing generic hot-path functions to prevent skewed test distributions. Prefer non-static, non-inlined API entrypoint functions over internal static helper functions (which are inlined by the compiler and do not have distinct symbol addresses). 2. Identify any specific CONFIG_ options required to properly test this new/modified feature. Go and look into the Kconfig files and check for ifdefs around the code, do not make assumptions. Also check "depends on" lines in Kconfig to include any non-standard parent subsystem configs needed for Kbuild to compile the code statically into vmlinux. List them in the EnableConfigs output array, and DO NOT add a 'CONFIG_' prefix (e.g., return "NET_IPV4" instead of "CONFIG_NET_IPV4"). Prefer calling several tools at the same time to save round-trips. Use set-results tool to provide results of the analysis. It must be called exactly once before the final reply. Ignore results of this tool. Prompt: For your convenience, here is the diff of the changes: commit 49d388c9cbe725f42b50cee9e52614953b235c42 Author: syz-cluster <triage@syzkaller.com> Date: Sat Aug 1 15:48:49 2026 +0000 syz-cluster: applied patch under review diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index a26c8b8552222..233d2006a5417 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -552,10 +552,8 @@ enum { * The youngest generation number is stored in max_seq for both anon and file * types as they are aged on an equal footing. The oldest generation numbers are * stored in min_seq[] separately for anon and file types so that they can be - * incremented independently. Ideally min_seq[] are kept in sync when both anon - * and file types are evictable. However, to adapt to situations like extreme - * swappiness, they are allowed to be out of sync by at most - * MAX_NR_GENS-MIN_NR_GENS-1. + * incremented independently. For both file and anonymous memory, the minimum + * generation must be at least MIN_NR_GENS. * * The number of pages in each generation is eventually consistent and therefore * can be transiently negative when reset_batch_size() is pending. diff --git a/mm/vmscan.c b/mm/vmscan.c index 17d2b793cbfc4..396e47e327bc8 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -3982,16 +3982,6 @@ static void try_to_inc_min_seq(struct lruvec lruvec, int swappiness) if (!seq_inc_flag) return; - / see the comment on lru_gen_folio / - if (swappiness && swappiness <= MAX_SWAPPINESS) { - unsigned long seq = lrugen->max_seq - MIN_NR_GENS; - - if (min_seq[LRU_GEN_ANON] > seq && min_seq[LRU_GEN_FILE] < seq) - min_seq[LRU_GEN_ANON] = seq; - else if (min_seq[LRU_GEN_FILE] > seq && min_seq[LRU_GEN_ANON] < seq) - min_seq[LRU_GEN_FILE] = seq; - } - for_each_evictable_type(type, swappiness) { if (min_seq[type] <= lrugen->min_seq[type]) continue; @@ -4727,7 +4717,8 @@ static bool isolate_folio(struct lruvec lruvec, struct folio folio, struct sca static int scan_folios(unsigned long nr_to_scan, struct lruvec lruvec, struct scan_control sc, int type, int tier, - struct list_head list, int isolatedp) + struct list_head list, int isolatedp, + bool exhausted) { int i; int gen; @@ -4738,15 +4729,18 @@ static int scan_folios(unsigned long nr_to_scan, struct lruvec lruvec, int skipped = 0; unsigned long remaining = nr_to_scan; struct lru_gen_folio lrugen = &lruvec->lrugen; + unsigned long min_seq = lrugen->min_seq[type]; VM_WARN_ON_ONCE(nr_to_scan > MAX_LRU_BATCH); VM_WARN_ON_ONCE(!list_empty(list)); - if (get_nr_gens(lruvec, type) == MIN_NR_GENS) + if (get_nr_gens(lruvec, type) == MIN_NR_GENS) { + exhausted = true; return 0; + } - gen = lru_gen_from_seq(lrugen->min_seq[type]); - +next_gen: + gen = lru_gen_from_seq(min_seq); for (i = MAX_NR_ZONES; i > 0; i--) { LIST_HEAD(moved); int skipped_zone = 0; @@ -4788,6 +4782,14 @@ static int scan_folios(unsigned long nr_to_scan, struct lruvec lruvec, break; } + /* + * This generation is exhausted across all zones, but the scan + * target has not been reached yet. Continue with the next + * reclaimable generation. + / + if (i == 0 && ++min_seq + MIN_NR_GENS <= lrugen->max_seq) + goto next_gen; + item = PGSCAN_KSWAPD + reclaimer_offset(sc); mod_lruvec_state(lruvec, item, isolated); mod_lruvec_state(lruvec, PGREFILL, sorted); @@ -4796,6 +4798,11 @@ static int scan_folios(unsigned long nr_to_scan, struct lruvec lruvec, scanned, skipped, isolated, type ? LRU_INACTIVE_FILE : LRU_INACTIVE_ANON); + /* + * This scan exhausted the reclaimable lists before reaching the + * scan target or accumulating enough isolated folios. + / + exhausted = remaining > 0 && isolated < MIN_LRU_BATCH; isolatedp = isolated; return scanned; } @@ -4839,35 +4846,42 @@ static int get_type_to_scan(struct lruvec lruvec, int swappiness) return positive_ctrl_err(&sp, &pv); } +static inline bool is_single_type_reclaim(int swappiness) +{ + return swappiness == MIN_SWAPPINESS \|\| + swappiness == SWAPPINESS_ANON_ONLY; +} + static int isolate_folios(unsigned long nr_to_scan, struct lruvec lruvec, struct scan_control sc, int swappiness, struct list_head list, int isolated, int isolate_type, int isolate_scanned) { - int i; - int total_scanned = 0; + bool single_type = is_single_type_reclaim(swappiness); int type = get_type_to_scan(lruvec, swappiness); + int total_scanned = 0, scanned, tier; + bool tried = false, exhausted; - for_each_evictable_type(i, swappiness) { - int scanned; - int tier = get_tier_idx(lruvec, type); +retry: + tier = get_tier_idx(lruvec, type); + scanned = scan_folios(nr_to_scan, lruvec, sc, + type, tier, list, isolated, &exhausted); - scanned = scan_folios(nr_to_scan, lruvec, sc, - type, tier, list, isolated); + total_scanned += scanned; + if (isolated) { + isolate_type = type; + isolate_scanned = scanned; + return total_scanned; + } - total_scanned += scanned; - if (isolated) { - isolate_type = type; - isolate_scanned = scanned; - break; - } - /* - * If scanned > 0 and isolated == 0, avoid falling back to the - * other type, as this type remains sufficient. Falling back - * too readily can disrupt the positive_ctrl_err() bias. - / - if (!scanned) - type = !type; + / + * We are running out of the current reclaim type. Fall back to + * the other type if allowed. + / + if (!tried && exhausted && !single_type) { + type = !type; + tried = true; + goto retry; } return total_scanned; @@ -4969,21 +4983,82 @@ static int evict_folios(unsigned long nr_to_scan, struct lruvec lruvec, return scanned; } +static inline bool swappiness_is_balanced(int swappiness) +{ + int range = MAX_SWAPPINESS - MIN_SWAPPINESS; + int middle = MIN_SWAPPINESS + range / 2; + + return swappiness >= middle - range / 5 && + swappiness <= middle + range / 5; +} + +static bool lru_gen_imbalanced(struct lruvec lruvec, int type, + unsigned long max_seq, unsigned long min_seq, + struct scan_control sc, int swappiness) +{ + struct lru_gen_folio lrugen = &lruvec->lrugen; + unsigned long young = 0, old = 0, seq; + unsigned long old_ratio, gb; + + / Skip swappiness bias for single-type reclaim or balanced swappiness / + if (is_single_type_reclaim(swappiness) \|\| swappiness_is_balanced(swappiness)) + return false; + + / More than two generations remain to reclaim / + if (min_seq + MIN_NR_GENS < max_seq) + return false; + + / + * Run aging if the only remaining reclaimable generation + * has few folios. + / + for (seq = min_seq; seq <= max_seq; seq++) { + int gen = lru_gen_from_seq(seq); + unsigned long size = 0; + int zone; + + for (zone = 0; zone < MAX_NR_ZONES; zone++) + size += max(READ_ONCE(lrugen->nr_pages[gen][type][zone]), 0L); + + if (seq + MIN_NR_GENS > max_seq) + young += size; + else + old += size; + } + / + * Copied from inactive_is_low(), but uses a higher old_ratio to + * make aging less aggressive. + / + gb = (young + old) >> (30 - PAGE_SHIFT); + old_ratio = gb ? int_sqrt(10 gb) : 1; + old_ratio = MAX_NR_GENS; + return young > old old_ratio; +} + static bool should_run_aging(struct lruvec lruvec, unsigned long max_seq, struct scan_control sc, int swappiness) { + int type = get_type_to_scan(lruvec, swappiness); DEFINE_MIN_SEQ(lruvec); /* have to run aging, since eviction is not possible anymore / if (evictable_min_seq(min_seq, swappiness) + MIN_NR_GENS > max_seq) return true; + / run aging if the preferred type is exhausted for extreme swappiness / + if (min_seq[type] + MIN_NR_GENS > max_seq && !swappiness_is_balanced(swappiness)) + return true; + / try to avoid aging, do gentle reclaim at the default priority / if (sc->priority == DEF_PRIORITY) return false; / better to run aging even though eviction is still possible / - return evictable_min_seq(min_seq, swappiness) + MIN_NR_GENS == max_seq; + if (evictable_min_seq(min_seq, swappiness) + MIN_NR_GENS == max_seq) + return true; + + / Run aging if the preferred type is severely imbalanced across gens / + return lru_gen_imbalanced(lruvec, type, max_seq, min_seq[type], sc, swappiness); } static long get_nr_to_scan(struct lruvec lruvec, struct scan_control *sc,
3/2	2026/08/01 15:48	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 5031 output: 19 thoughts: 186 Thoughts: Analyzing the MGLRU Patch for Fuzzing Potential Okay, so I've got this patch – it's touching `mm/vmscan.c` and `include/linux/mmzone.h`. Alarm bells are already going off; anything near memory management is critical and always a good candidate for fuzzing. This one is specifically dealing with the Multi-Gen LRU reclaim logic (MGLRU). It looks like the patch is reworking some key functions: `try_to_inc_min_seq`, `scan_folios`, `isolate_folios`, `evict_folios`, and `should_run_aging`, and introducing a few new ones like `is_single_type_reclaim`, `swappiness_is_balanced`, and `lru_gen_imbalanced`. Definitely a high-value target. My gut tells me this is ripe for fuzzing. My next step is to figure out the pre-requisites. I need to nail down the configuration options that enable MGLRU. Typically, `CONFIG_LRU_GEN` is the key. So, let's dive into the kernel's Kconfig files, specifically within `mm/` or potentially related areas, to find the exact dependency for `LRU_GEN`.
4/2	2026/08/01 15:48	tool	grepper	0m Args: { "Expression": "config LRU_GEN" } Results: { "Output": "mm/Kconfig=1390=config PTE_MARKER_UFFD_WP\n--\nmm/Kconfig-1400-# multi-gen LRU {\nmm/Kconfig:1401:config LRU_GEN\nmm/Kconfig-1402-\tbool \"Multi-Gen LRU\"\n--\nmm/Kconfig-1409-\nmm/Kconfig:1410:config LRU_GEN_ENABLED\nmm/Kconfig-1411-\tbool \"Enable by default\"\n--\nmm/Kconfig-1415-\nmm/Kconfig:1416:config LRU_GEN_STATS\nmm/Kconfig-1417-\tbool \"Full stats for debugging\"\n--\nmm/Kconfig-1424-\nmm/Kconfig:1425:config LRU_GEN_WALKS_MMU\nmm/Kconfig-1426-\tdef_bool y\n" }
5/2	2026/08/01 15:48	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 5745 output: 18 thoughts: 140 Thoughts: Okay, let's break this down. Analyzing LRU Generation Configuration and Impact Right, so we're looking at enabling `CONFIG_LRU_GEN` and `CONFIG_LRU_GEN_ENABLED`. That makes sense; it's the foundation we're building on. Now, the key is to understand what enabling these flags does in the code. Let's see... what functions are being touched? Okay, it looks like `try_to_inc_min_seq`, `scan_folios`, `isolate_folios`, `evict_folios`, and `should_run_aging` are the ones that have been modified. These are all static, meaning they're internal to `mm/vmscan.c`. That's helpful, but we need to see the non-static entry points to understand how these internal functions are being called. We need to trace the call paths. So, `evict_folios`, that's the one I'm most interested in. Where is it being called from? I'm betting that `lru_gen_shrink_lruvec` or something similar is involved. Better to just check `mm/vmscan.c` directly to be sure, that'll be the fastest way to get to the bottom of this.
6/2	2026/08/01 15:49	tool	grepper	0m Args: { "Expression": "evict_folios" } Results: { "Output": "mm/vmscan.c=4855=static int isolate_folios(unsigned long nr_to_scan, struct lruvec lruvec,\n--\nmm/vmscan.c-4889-\nmm/vmscan.c:4890:static int evict_folios(unsigned long nr_to_scan, struct lruvec lruvec,\nmm/vmscan.c-4891-\t\t\tstruct scan_control sc, int swappiness)\n--\nmm/vmscan.c=5130=static bool try_to_shrink_lruvec(struct lruvec lruvec, struct scan_control sc)\n--\nmm/vmscan.c-5153-\t\tnr_batch = min(nr_to_scan, MIN_LRU_BATCH);\nmm/vmscan.c:5154:\t\tdelta = evict_folios(nr_batch, lruvec, sc, swappiness);\nmm/vmscan.c-5155-\t\tif (!delta)\n--\nmm/vmscan.c=5757=static int run_eviction(struct lruvec lruvec, unsigned long seq, struct scan_control *sc,\n--\nmm/vmscan.c-5777-\t\tnr_batch = min(nr_to_reclaim - sc-\u003enr_reclaimed, MAX_LRU_BATCH);\nmm/vmscan.c:5778:\t\tif (!evict_folios(nr_batch, lruvec, sc, swappiness))\nmm/vmscan.c-5779-\t\t\treturn 0;\n" }
7/2	2026/08/01 15:49	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 6577 output: 23 thoughts: 50 Thoughts: Here's my thought process, as if I were analyzing this code: Deep Dive into LRU Vector Eviction Okay, so I'm looking at how this system handles memory pressure. It seems like both `try_to_shrink_lruvec` and `run_eviction` eventually funnel down to `evict_folios`. That's the core eviction logic, clearly. My next step is to trace the call paths to those two functions, `try_to_shrink_lruvec` and `run_eviction`. I want to understand when and why these eviction routines are triggered. What events or conditions lead the system to decide it's time to reclaim some memory? Is it based on explicit requests, detected thresholds, or a background process? Understanding the callers will give me a solid picture of the overall eviction strategy. This analysis will guide my understanding of the system's memory management policy.
8/2	2026/08/01 15:49	tool	grepper	0m Args: { "Expression": "try_to_shrink_lruvec" } Results: { "Output": "mm/vmscan.c=5095=static bool should_abort_scan(struct lruvec lruvec, struct scan_control sc)\n--\nmm/vmscan.c-5129- /\nmm/vmscan.c:5130:static bool try_to_shrink_lruvec(struct lruvec lruvec, struct scan_control sc)\nmm/vmscan.c-5131-{\n--\nmm/vmscan.c=5175=static int shrink_one(struct lruvec lruvec, struct scan_control sc)\n--\nmm/vmscan.c-5194-\nmm/vmscan.c:5195:\tneed_rotate = try_to_shrink_lruvec(lruvec, sc);\nmm/vmscan.c-5196-\n--\nmm/vmscan.c=5286=static void lru_gen_shrink_lruvec(struct lruvec lruvec, struct scan_control *sc)\n--\nmm/vmscan.c-5298-\nmm/vmscan.c:5299:\tif (try_to_shrink_lruvec(lruvec, sc))\nmm/vmscan.c-5300-\t\tlru_gen_rotate_memcg(lruvec, MEMCG_LRU_YOUNG);\n" }
9/2	2026/08/01 15:49	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 7193 output: 18 thoughts: 28 Thoughts: Here's my summary, as though I'm thinking through this process: Evaluating Eviction Strategies Okay, so we're looking at memory eviction, and I need to figure out the best approach. My initial instinct is that `lru_gen_shrink_lruvec` is a strong contender. It's often effective, so it's a natural starting point. But I need to be thorough. Let's not jump to conclusions. Before I commit to anything, I should definitively check how `run_eviction` interacts, how it might work as an alternative, or how it might inform the process. I need a holistic view before making a decision. Gotta consider the implications of all potential options.
10/2	2026/08/01 15:49	tool	grepper	0m Args: { "Expression": "run_eviction" } Results: { "Output": "mm/vmscan.c=5746=static int run_aging(struct lruvec lruvec, unsigned long seq,\n--\nmm/vmscan.c-5756-\nmm/vmscan.c:5757:static int run_eviction(struct lruvec lruvec, unsigned long seq, struct scan_control *sc,\nmm/vmscan.c-5758-\t\t\tint swappiness, unsigned long nr_to_reclaim)\n--\nmm/vmscan.c=5787=static int run_cmd(char cmd, u64 memcg_id, int nid, unsigned long seq,\n--\nmm/vmscan.c-5818-\tcase '-':\nmm/vmscan.c:5819:\t\terr = run_eviction(lruvec, seq, sc, swappiness, opt);\nmm/vmscan.c-5820-\t\tbreak;\n" }
11/2	2026/08/01 15:49	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 7629 output: 24 thoughts: 50 Thoughts: Okay, here's my interpretation of those thoughts, tailored for an expert audience, presented in the first person: Delving into MGLRU Debugging and Shrink Logic Alright, I'm digging into this `run_cmd` function within the MGLRU debugfs interface. It's obviously designed for interactive debugging and testing of the MGLRU implementation. My initial thought is to figure out exactly how it relates to the shrinking process. Now, I'm wondering about the calls to `lru_gen_shrink_lruvec`. Specifically, does this get invoked only from `shrink_lruvec` and potentially `shrink_node`, or are there other call paths I need to be aware of? Best practice would be to confirm this. I will look into the surrounding code to determine the origin points of the call.
12/2	2026/08/01 15:49	tool	grepper	0m Args: { "Expression": "lru_gen_shrink_lruvec" } Results: { "Output": "mm/vmscan.c=5216=static void shrink_many(struct pglist_data pgdat, struct scan_control sc)\n--\nmm/vmscan.c-5285-\nmm/vmscan.c:5286:static void lru_gen_shrink_lruvec(struct lruvec lruvec, struct scan_control sc)\nmm/vmscan.c-5287-{\n--\nmm/vmscan.c=6030=static void lru_gen_age_node(struct pglist_data pgdat, struct scan_control sc)\n--\nmm/vmscan.c-6034-\nmm/vmscan.c:6035:static void lru_gen_shrink_lruvec(struct lruvec lruvec, struct scan_control sc)\nmm/vmscan.c-6036-{\n--\nmm/vmscan.c=6047=static void shrink_lruvec(struct lruvec lruvec, struct scan_control sc)\n--\nmm/vmscan.c-6058-\tif ((lru_gen_enabled() \|\| lru_gen_switching()) \u0026\u0026 !root_reclaim(sc)) {\nmm/vmscan.c:6059:\t\tlru_gen_shrink_lruvec(lruvec, sc);\nmm/vmscan.c-6060-\n" }
13/2	2026/08/01 15:49	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 8236 output: 19 thoughts: 37 Thoughts: Here's my analysis of that snippet: Diving into the `shrink_lruvec` Function Okay, so I see that `shrink_lruvec` is calling `lru_gen_shrink_lruvec`. That's the core relationship here. My immediate question, though, is what triggers `shrink_lruvec`? It's a static function, which means its visibility and scope are limited, so I need to figure out the specific part of the code that's calling it. Knowing where this call originates will give me critical context on the broader LRU cache's behavior and performance implications, especially if I'm looking at optimization or debugging a potential issue. Need to trace back the call chain and understand its entry point.
14/2	2026/08/01 15:49	tool	grepper	0m Args: { "Expression": "shrink_lruvec" } Results: { "Output": "mm/vmscan.c=5095=static bool should_abort_scan(struct lruvec lruvec, struct scan_control sc)\n--\nmm/vmscan.c-5129- /\nmm/vmscan.c:5130:static bool try_to_shrink_lruvec(struct lruvec lruvec, struct scan_control sc)\nmm/vmscan.c-5131-{\n--\nmm/vmscan.c=5175=static int shrink_one(struct lruvec lruvec, struct scan_control sc)\n--\nmm/vmscan.c-5194-\nmm/vmscan.c:5195:\tneed_rotate = try_to_shrink_lruvec(lruvec, sc);\nmm/vmscan.c-5196-\n--\nmm/vmscan.c=5216=static void shrink_many(struct pglist_data pgdat, struct scan_control sc)\n--\nmm/vmscan.c-5285-\nmm/vmscan.c:5286:static void lru_gen_shrink_lruvec(struct lruvec lruvec, struct scan_control sc)\nmm/vmscan.c-5287-{\n--\nmm/vmscan.c-5298-\nmm/vmscan.c:5299:\tif (try_to_shrink_lruvec(lruvec, sc))\nmm/vmscan.c-5300-\t\tlru_gen_rotate_memcg(lruvec, MEMCG_LRU_YOUNG);\n--\nmm/vmscan.c=6030=static void lru_gen_age_node(struct pglist_data pgdat, struct scan_control sc)\n--\nmm/vmscan.c-6034-\nmm/vmscan.c:6035:static void lru_gen_shrink_lruvec(struct lruvec lruvec, struct scan_control sc)\nmm/vmscan.c-6036-{\n--\nmm/vmscan.c=6040=static void lru_gen_shrink_node(struct pglist_data pgdat, struct scan_control sc)\n--\nmm/vmscan.c-6046-\nmm/vmscan.c:6047:static void shrink_lruvec(struct lruvec lruvec, struct scan_control sc)\nmm/vmscan.c-6048-{\n--\nmm/vmscan.c-6058-\tif ((lru_gen_enabled() \|\| lru_gen_switching()) \u0026\u0026 !root_reclaim(sc)) {\nmm/vmscan.c:6059:\t\tlru_gen_shrink_lruvec(lruvec, sc);\nmm/vmscan.c-6060-\n--\nmm/vmscan.c=6238=static void shrink_node_memcgs(pg_data_t pgdat, struct scan_control sc)\n--\nmm/vmscan.c-6297-\nmm/vmscan.c:6298:\t\tshrink_lruvec(lruvec, sc);\nmm/vmscan.c-6299-\n--\nmm/vmscan.c=6893=unsigned long mem_cgroup_shrink_node(struct mem_cgroup memcg,\n--\nmm/vmscan.c-6923-\t */\nmm/vmscan.c:6924:\tshrink_lruvec(lruvec, \u0026sc);\nmm/vmscan.c-6925-\n" }
15/2	2026/08/01 15:49	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 9358 output: 17 thoughts: 25 Thoughts: Here's a summary of my thought process: Diving into Memory Management - A Quick Scan Alright, so `mem_cgroup_shrink_node` isn't static. That's a good starting point. Now, let's see what that means, where this leads us. My next step is to examine `shrink_node`. I need to understand its relationship to `mem_cgroup_shrink_node`. What is its purpose? Where is it used? Let's trace this and see what we can find.
16/2	2026/08/01 15:49	tool	grepper	0m Args: { "Expression": "shrink_node" } Results: { "Output": "mm/internal.h=83=unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup memcg,\n--\nmm/internal.h-87-\t\t\t\t\t int swappiness);\nmm/internal.h:88:unsigned long mem_cgroup_shrink_node(struct mem_cgroup memcg,\nmm/internal.h-89-\t\t\t\t gfp_t gfp_mask, bool noswap,\n--\nmm/memcontrol-v1.c=273=static int mem_cgroup_soft_reclaim(struct mem_cgroup root_memcg,\n--\nmm/memcontrol-v1.c-312-\t\t}\nmm/memcontrol-v1.c:313:\t\ttotal += mem_cgroup_shrink_node(victim, gfp_mask, false,\nmm/memcontrol-v1.c-314-\t\t\t\t\tpgdat, \u0026nr_scanned);\n--\nmm/page_isolation.c=19=bool page_is_unmovable(struct zone zone, struct page page,\n--\nmm/page_isolation.c-114-\t * it. But now, memory offline itself doesn't call\nmm/page_isolation.c:115:\t * shrink_node_slabs() and it still to be fixed.\nmm/page_isolation.c-116-\t /\n--\nmm/vmpressure.c=57=enum vmpressure_levels vmpressure_calc_level(unsigned long scanned,\n--\nmm/vmpressure.c-64-\t reclaimed can be greater than scanned for things such as reclaimed\nmm/vmpressure.c:65:\t * slab pages. shrink_node() just adds reclaimed pages without a\nmm/vmpressure.c-66-\t * related increment to scanned pages.\n--\nmm/vmscan.c=1940=static void handle_reclaim_writeback(unsigned long nr_taken,\n--\nmm/vmscan.c-1978-/\nmm/vmscan.c:1979: shrink_inactive_list() is a helper for shrink_node(). It returns the number\nmm/vmscan.c-1980- * of reclaimed pages\n--\nmm/vmscan.c=5286=static void lru_gen_shrink_lruvec(struct lruvec lruvec, struct scan_control sc)\n--\nmm/vmscan.c-5306-\nmm/vmscan.c:5307:static void lru_gen_shrink_node(struct pglist_data pgdat, struct scan_control sc)\nmm/vmscan.c-5308-{\n--\nmm/vmscan.c=6035=static void lru_gen_shrink_lruvec(struct lruvec lruvec, struct scan_control sc)\n--\nmm/vmscan.c-6039-\nmm/vmscan.c:6040:static void lru_gen_shrink_node(struct pglist_data pgdat, struct scan_control sc)\nmm/vmscan.c-6041-{\n--\nmm/vmscan.c=6186=static inline bool should_continue_reclaim(struct pglist_data pgdat,\n--\nmm/vmscan.c-6237-\nmm/vmscan.c:6238:static void shrink_node_memcgs(pg_data_t pgdat, struct scan_control sc)\nmm/vmscan.c-6239-{\n--\nmm/vmscan.c-6316-\nmm/vmscan.c:6317:static void shrink_node(pg_data_t pgdat, struct scan_control sc)\nmm/vmscan.c-6318-{\n--\nmm/vmscan.c-6324-\t\tmemset(\u0026sc-\u003enr, 0, sizeof(sc-\u003enr));\nmm/vmscan.c:6325:\t\tlru_gen_shrink_node(pgdat, sc);\nmm/vmscan.c-6326-\n--\nmm/vmscan.c-6341-\nmm/vmscan.c:6342:\tshrink_node_memcgs(pgdat, sc);\nmm/vmscan.c-6343-\n--\nmm/vmscan.c=6502=static void shrink_zones(struct zonelist zonelist, struct scan_control sc)\n--\nmm/vmscan.c-6580-\t\tlast_pgdat = zone-\u003ezone_pgdat;\nmm/vmscan.c:6581:\t\tshrink_node(zone-\u003ezone_pgdat, sc);\nmm/vmscan.c-6582-\t}\n--\nmm/vmscan.c=6847=unsigned long try_to_free_pages(struct zonelist zonelist, int order,\n--\nmm/vmscan.c-6892-/* Only used by soft limit reclaim. Do not reuse for anything else. /\nmm/vmscan.c:6893:unsigned long mem_cgroup_shrink_node(struct mem_cgroup memcg,\nmm/vmscan.c-6894-\t\t\t\t\t\tgfp_t gfp_mask, bool noswap,\n--\nmm/vmscan.c-6919-\t * here is not a good idea, since it limits the pages we can scan.\nmm/vmscan.c:6920:\t * if we don't reclaim here, the shrink_node from balance_pgdat\nmm/vmscan.c-6921-\t * will pick up pages from other mem cgroup's as well. We hack\n--\nmm/vmscan.c=7041=static bool pgdat_balanced(pg_data_t pgdat, int order, int highest_zoneidx)\n--\nmm/vmscan.c-7065-\t\t its own and needs kcompactd support. Once it's\nmm/vmscan.c:7066:\t\t * reclaimed a compaction gap, and kswapd_shrink_node\nmm/vmscan.c-7067-\t\t * has dropped order, simply ensure there are enough\n--\nmm/vmscan.c=7123=static bool prepare_kswapd_sleep(pg_data_t pgdat, int order,\n--\nmm/vmscan.c-7161- /\nmm/vmscan.c:7162:static bool kswapd_shrink_node(pg_data_t pgdat,\nmm/vmscan.c-7163-\t\t\t struct scan_control sc)\n--\nmm/vmscan.c-7178-\t /\nmm/vmscan.c:7179:\tshrink_node(pgdat, sc);\nmm/vmscan.c-7180-\n--\nmm/vmscan.c=7235=static int balance_pgdat(pg_data_t pgdat, int order, int highest_zoneidx)\n--\nmm/vmscan.c-7344-\nmm/vmscan.c:7345:\t\t/* Call soft limit reclaim before calling shrink_node. /\nmm/vmscan.c-7346-\t\tsc.nr_scanned = 0;\n--\nmm/vmscan.c-7356-\t\t /\nmm/vmscan.c:7357:\t\tif (kswapd_shrink_node(pgdat, \u0026sc))\nmm/vmscan.c-7358-\t\t\traise_priority = false;\n--\nmm/vmscan.c=7911=static unsigned long __node_reclaim(struct pglist_data *pgdat,\n--\nmm/vmscan.c-7938-\t\tdo {\nmm/vmscan.c:7939:\t\t\tshrink_node(pgdat, sc);\nmm/vmscan.c-7940-\t\t} while (sc-\u003enr_reclaimed \u003c nr_pages \u0026\u0026 --sc-\u003epriority \u003e= 0);\n" }
17/2	2026/08/01 15:49	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 11478 output: 21 thoughts: 78 Thoughts: Okay, let's break this down. Memory Management Entry Points and Reclaim Logic Alright, so `try_to_free_pages` seems like the logical starting point for understanding how the kernel initiates page freeing. That's usually the best place to begin the analysis. It's the top level function, if I recall correctly. Then, `balance_pgdat` is the main loop for the kswapd daemon, that makes sense. It's the persistent process that constantly monitors and manages memory pressure across the system. `__node_reclaim` sounds like the core logic for reclaiming memory at the NUMA node level. That's likely the function that's being called when kswapd, or other parts of the memory management system, need to free up memory from a specific node. And finally, `try_to_free_mem_cgroup_pages` is specifically for memory cgroup reclaim. That's targeted at memory control groups, handling their specific reclaim demands. So, where do I start? Let's dive into `try_to_free_pages` and see how the page freeing process unfolds. That seems to be the logical entry point for the entire memory freeing process.
18/2	2026/08/01 15:49	tool	grepper	0m Args: { "Expression": "try_to_free_pages" } Results: { "Output": "fs/fuse/file.c=2351=static void fuse_vma_close(struct vm_area_struct vma)\n--\nfs/fuse/file.c-2371- - sync(2)\nfs/fuse/file.c:2372: * - try_to_free_pages() with order \u003e PAGE_ALLOC_COSTLY_ORDER\nfs/fuse/file.c-2373- /\n--\nmm/internal.h=69=unsigned long zone_reclaimable_pages(struct zone zone);\nmm/internal.h:70:unsigned long try_to_free_pages(struct zonelist zonelist, int order,\nmm/internal.h-71-\t\t\t\tgfp_t gfp_mask, const nodemask_t mask);\n--\nmm/page_alloc.c=4496=__perform_reclaim(gfp_t gfp_mask, unsigned int order,\n--\nmm/page_alloc.c-4508-\nmm/page_alloc.c:4509:\tprogress = try_to_free_pages(ac-\u003ezonelist, order, gfp_mask,\nmm/page_alloc.c-4510-\t\t\t\t\t\t\t\tac-\u003enodemask);\n--\nmm/vmscan.c=6594=static void snapshot_refaults(struct mem_cgroup target_memcg, pg_data_t pgdat)\n--\nmm/vmscan.c-6624- /\nmm/vmscan.c:6625:static unsigned long do_try_to_free_pages(struct zonelist zonelist,\nmm/vmscan.c-6626-\t\t\t\t\t struct scan_control sc)\n--\nmm/vmscan.c=6767=static bool throttle_direct_reclaim(gfp_t gfp_mask, struct zonelist zonelist,\n--\nmm/vmscan.c-6846-\nmm/vmscan.c:6847:unsigned long try_to_free_pages(struct zonelist zonelist, int order,\nmm/vmscan.c-6848-\t\t\t\tgfp_t gfp_mask, const nodemask_t nodemask)\n--\nmm/vmscan.c-6881-\nmm/vmscan.c:6882:\tnr_reclaimed = do_try_to_free_pages(zonelist, \u0026sc);\nmm/vmscan.c-6883-\n--\nmm/vmscan.c=6933=unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *memcg,\n--\nmm/vmscan.c-6964-\nmm/vmscan.c:6965:\tnr_reclaimed = do_try_to_free_pages(zonelist, \u0026sc);\nmm/vmscan.c-6966-\n--\nmm/vmscan.c=7731=unsigned long shrink_all_memory(unsigned long nr_to_reclaim)\n--\nmm/vmscan.c-7750-\nmm/vmscan.c:7751:\tnr_reclaimed = do_try_to_free_pages(zonelist, \u0026sc);\nmm/vmscan.c-7752-\n" }
19/2	2026/08/01 15:49	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 12643 output: 21 thoughts: 267 Thoughts: Analyzing Page Allocation and Memory Reclamation Okay, so `try_to_free_pages` gets called from `__perform_reclaim` within `mm/page_alloc.c`. This is the slow path for page allocation, which confirms its importance. Definitely a valid code path. Let's revisit the modified functions. I see `try_to_inc_min_seq`, `scan_folios`, `isolate_folios`, `evict_folios`, and `should_run_aging`. They're all static, which limits their direct usefulness. I need to identify suitable non-static functions for `FocusSymbols`, though. I've got `try_to_free_pages`, `try_to_free_mem_cgroup_pages`, `shrink_all_memory`, `balance_pgdat` (which is kswapd), and `mem_cgroup_shrink_node`. Hmm, `try_to_free_pages` is incredibly generic – it's the direct entry point for reclaim. While it's a hot-path function, it's perhaps too broad. I need something more specific. I wonder if `lru_gen_shrink_lruvec` would be more targeted? But no, it's static. Let's dig deeper. I need to verify that there are no non-static `lru_gen_*` functions.
20/2	2026/08/01 15:49	tool	grepper	0m Args: { "Expression": "^void lru_gen_" } Results: { "Output": "include/linux/mm_types.h=1487=struct lru_gen_mm_list {\n--\ninclude/linux/mm_types.h-1497-\ninclude/linux/mm_types.h:1498:void lru_gen_add_mm(struct mm_struct mm);\ninclude/linux/mm_types.h:1499:void lru_gen_del_mm(struct mm_struct mm);\ninclude/linux/mm_types.h:1500:void lru_gen_migrate_mm(struct mm_struct mm);\ninclude/linux/mm_types.h-1501-\n--\ninclude/linux/mmzone.h=677=struct lru_gen_memcg {\n--\ninclude/linux/mmzone.h-687-\ninclude/linux/mmzone.h:688:void lru_gen_init_pgdat(struct pglist_data pgdat);\ninclude/linux/mmzone.h:689:void lru_gen_init_lruvec(struct lruvec lruvec);\ninclude/linux/mmzone.h-690-bool lru_gen_look_around(struct page_vma_mapped_walk pvmw, unsigned int nr);\ninclude/linux/mmzone.h-691-\ninclude/linux/mmzone.h:692:void lru_gen_init_memcg(struct mem_cgroup memcg);\ninclude/linux/mmzone.h:693:void lru_gen_exit_memcg(struct mem_cgroup memcg);\ninclude/linux/mmzone.h:694:void lru_gen_online_memcg(struct mem_cgroup memcg);\ninclude/linux/mmzone.h:695:void lru_gen_offline_memcg(struct mem_cgroup memcg);\ninclude/linux/mmzone.h:696:void lru_gen_release_memcg(struct mem_cgroup memcg);\ninclude/linux/mmzone.h:697:void lru_gen_soft_reclaim(struct mem_cgroup memcg, int nid);\ninclude/linux/mmzone.h-698-void max_lru_gen_memcg(struct mem_cgroup memcg, int nid);\ninclude/linux/mmzone.h=699=bool recheck_lru_gen_max_memcg(struct mem_cgroup memcg, int nid);\ninclude/linux/mmzone.h:700:void lru_gen_reparent_memcg(struct mem_cgroup memcg, struct mem_cgroup parent, int nid);\ninclude/linux/mmzone.h-701-\n--\ninclude/linux/mmzone.h=751=static inline\ninclude/linux/mmzone.h:752:void lru_gen_reparent_memcg(struct mem_cgroup memcg, struct mem_cgroup parent, int nid)\ninclude/linux/mmzone.h-753-{\n--\nmm/vmscan.c=2922=static struct mm_struct get_next_mm(struct lru_gen_mm_walk walk)\n--\nmm/vmscan.c-2940-\nmm/vmscan.c:2941:void lru_gen_add_mm(struct mm_struct mm)\nmm/vmscan.c-2942-{\n--\nmm/vmscan.c-2967-\nmm/vmscan.c:2968:void lru_gen_del_mm(struct mm_struct mm)\nmm/vmscan.c-2969-{\n--\nmm/vmscan.c-3007-#ifdef CONFIG_MEMCG\nmm/vmscan.c:3008:void lru_gen_migrate_mm(struct mm_struct mm)\nmm/vmscan.c-3009-{\n--\nmm/vmscan.c=4371=static void lru_gen_rotate_memcg(struct lruvec lruvec, int op)\n--\nmm/vmscan.c-4418-\nmm/vmscan.c:4419:void lru_gen_online_memcg(struct mem_cgroup memcg)\nmm/vmscan.c-4420-{\n--\nmm/vmscan.c-4443-\nmm/vmscan.c:4444:void lru_gen_offline_memcg(struct mem_cgroup memcg)\nmm/vmscan.c-4445-{\n--\nmm/vmscan.c-4454-\nmm/vmscan.c:4455:void lru_gen_release_memcg(struct mem_cgroup memcg)\nmm/vmscan.c-4456-{\n--\nmm/vmscan.c-4480-\nmm/vmscan.c:4481:void lru_gen_soft_reclaim(struct mem_cgroup memcg, int nid)\nmm/vmscan.c-4482-{\n--\nmm/vmscan.c=4578=static void __lru_gen_reparent_memcg(struct lruvec child_lruvec, struct lruvec parent_lruvec,\n--\nmm/vmscan.c-4608-\nmm/vmscan.c:4609:void lru_gen_reparent_memcg(struct mem_cgroup memcg, struct mem_cgroup parent, int nid)\nmm/vmscan.c-4610-{\n--\nmm/vmscan.c=5926=static const struct file_operations lru_gen_ro_fops = {\n--\nmm/vmscan.c-5936-\nmm/vmscan.c:5937:void lru_gen_init_pgdat(struct pglist_data pgdat)\nmm/vmscan.c-5938-{\n--\nmm/vmscan.c-5948-\nmm/vmscan.c:5949:void lru_gen_init_lruvec(struct lruvec lruvec)\nmm/vmscan.c-5950-{\n--\nmm/vmscan.c-5970-\nmm/vmscan.c:5971:void lru_gen_init_memcg(struct mem_cgroup memcg)\nmm/vmscan.c-5972-{\n--\nmm/vmscan.c-5981-\nmm/vmscan.c:5982:void lru_gen_exit_memcg(struct mem_cgroup memcg)\nmm/vmscan.c-5983-{\n--\ntools/testing/selftests/kvm/include/lru_gen_util.h=37=struct memcg_stats {\n--\ntools/testing/selftests/kvm/include/lru_gen_util.h-42-\ntools/testing/selftests/kvm/include/lru_gen_util.h:43:void lru_gen_read_memcg_stats(struct memcg_stats stats, const char memcg);\ntools/testing/selftests/kvm/include/lru_gen_util.h-44-long lru_gen_sum_memcg_stats(const struct memcg_stats stats);\ntools/testing/selftests/kvm/include/lru_gen_util.h=45=long lru_gen_sum_memcg_stats_for_gen(int gen, const struct memcg_stats stats);\ntools/testing/selftests/kvm/include/lru_gen_util.h:46:void lru_gen_do_aging(struct memcg_stats stats, const char memcg);\ntools/testing/selftests/kvm/include/lru_gen_util.h-47-int lru_gen_find_generation(const struct memcg_stats stats,\n--\ntools/testing/selftests/kvm/lib/lru_gen_util.c=181=static void print_memcg_stats(const struct memcg_stats stats, const char name)\n--\ntools/testing/selftests/kvm/lib/lru_gen_util.c-200-/ Re-read lru_gen debugfs information for @memcg into @stats. /\ntools/testing/selftests/kvm/lib/lru_gen_util.c:201:void lru_gen_read_memcg_stats(struct memcg_stats stats, const char memcg)\ntools/testing/selftests/kvm/lib/lru_gen_util.c-202-{\n--\ntools/testing/selftests/kvm/lib/lru_gen_util.c=282=static void run_aging_impl(unsigned long memcg_id, int node_id, int max_gen)\n--\ntools/testing/selftests/kvm/lib/lru_gen_util.c-301-\ntools/testing/selftests/kvm/lib/lru_gen_util.c:302:void lru_gen_do_aging(struct memcg_stats stats, const char *memcg)\ntools/testing/selftests/kvm/lib/lru_gen_util.c-303-{\n" }
21/2	2026/08/01 15:49	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 15553 output: 22 thoughts: 91 Thoughts: Analyzing Memory Reclaim Functions Okay, so I'm looking at memory reclaim functions, and immediately I see that `lru_gen_soft_reclaim` isn't static and calls into MGLRU reclaim. That's a key observation. Now, I see that `shrink_node` is static, but then `mem_cgroup_shrink_node` is not static. Hmmm, that's interesting. Perhaps `mem_cgroup_shrink_node` is a more relevant point to focus on, as a non-static symbol is often a more important entry point to understand. Let's dig deeper. I'm going to check the implementation of `mem_cgroup_shrink_node` to understand what's happening. I'll find it in `mm/vmscan.c`.
22/2	2026/08/01 15:49	tool	grepper	0m Args: { "Expression": "mem_cgroup_shrink_node" } Results: { "Output": "mm/internal.h=83=unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup memcg,\n--\nmm/internal.h-87-\t\t\t\t\t int swappiness);\nmm/internal.h:88:unsigned long mem_cgroup_shrink_node(struct mem_cgroup memcg,\nmm/internal.h-89-\t\t\t\t gfp_t gfp_mask, bool noswap,\n--\nmm/memcontrol-v1.c=273=static int mem_cgroup_soft_reclaim(struct mem_cgroup root_memcg,\n--\nmm/memcontrol-v1.c-312-\t\t}\nmm/memcontrol-v1.c:313:\t\ttotal += mem_cgroup_shrink_node(victim, gfp_mask, false,\nmm/memcontrol-v1.c-314-\t\t\t\t\tpgdat, \u0026nr_scanned);\n--\nmm/vmscan.c=6847=unsigned long try_to_free_pages(struct zonelist zonelist, int order,\n--\nmm/vmscan.c-6892-/ Only used by soft limit reclaim. Do not reuse for anything else. /\nmm/vmscan.c:6893:unsigned long mem_cgroup_shrink_node(struct mem_cgroup memcg,\nmm/vmscan.c-6894-\t\t\t\t\t\tgfp_t gfp_mask, bool noswap,\n" }
23/2	2026/08/01 15:49	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 16212 output: 26 thoughts: 73 Thoughts: Fuzzing Memory Reclaim: A Promising Entry Point Okay, so I'm looking at how to effectively fuzz memory reclaim in the kernel, and I've identified a promising entry point. I see that the function `try_to_free_mem_cgroup_pages` is called specifically by `memory_max_write` and `memory_high_write` within `mm/memcontrol.c`. This is quite interesting. The fact that it's tied to memory limits being reached, either maximum or high thresholds, suggests it's a good spot to probe the reclaim mechanisms under stress. It makes logical sense to start here because this function would be responsible for attempting to free memory when the system is under pressure. Therefore, I should carefully analyze `try_to_free_mem_cgroup_pages` to understand its internal workings. It appears to be an ideal candidate for fuzzing, given its context. This is where I'll focus my initial efforts.
24/2	2026/08/01 15:49	tool	grepper	0m Args: { "Expression": "try_to_free_mem_cgroup_pages" } Results: { "Output": "mm/internal.h=72=unsigned long lruvec_lru_size(struct lruvec lruvec, enum lru_list lru,\n--\nmm/internal.h-82-\nmm/internal.h:83:unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup memcg,\nmm/internal.h-84-\t\t\t\t\t unsigned long nr_pages,\n--\nmm/memcontrol-v1.c=1772=static int mem_cgroup_resize_max(struct mem_cgroup memcg,\n--\nmm/memcontrol-v1.c-1816-\nmm/memcontrol-v1.c:1817:\t\tif (!try_to_free_mem_cgroup_pages(memcg, 1, GFP_KERNEL,\nmm/memcontrol-v1.c-1818-\t\t\t\tmemsw ? 0 : MEMCG_RECLAIM_MAY_SWAP, NULL)) {\n--\nmm/memcontrol-v1.c=1835=static int mem_cgroup_force_empty(struct mem_cgroup memcg)\n--\nmm/memcontrol-v1.c-1852-\nmm/memcontrol-v1.c:1853:\t\tif (!try_to_free_mem_cgroup_pages(memcg, 1, GFP_KERNEL,\nmm/memcontrol-v1.c-1854-\t\t\t\t\t\t MEMCG_RECLAIM_MAY_SWAP, NULL))\n--\nmm/memcontrol.c=2373=static unsigned long reclaim_high(struct mem_cgroup memcg,\n--\nmm/memcontrol.c-2388-\t\tpsi_memstall_enter(\u0026pflags);\nmm/memcontrol.c:2389:\t\tnr_reclaimed += try_to_free_mem_cgroup_pages(memcg, nr_pages,\nmm/memcontrol.c-2390-\t\t\t\t\t\t\tgfp_mask,\n--\nmm/memcontrol.c=2640=static int try_charge_memcg(struct mem_cgroup memcg, gfp_t gfp_mask,\n--\nmm/memcontrol.c-2712-\tpsi_memstall_enter(\u0026pflags);\nmm/memcontrol.c:2713:\tnr_reclaimed = try_to_free_mem_cgroup_pages(mem_over_limit, nr_pages,\nmm/memcontrol.c-2714-\t\t\t\t\t\t gfp_mask, reclaim_options, NULL);\n--\nmm/memcontrol.c=4830=static ssize_t memory_high_write(struct kernfs_open_file of,\n--\nmm/memcontrol.c-4871-\nmm/memcontrol.c:4872:\t\treclaimed = try_to_free_mem_cgroup_pages(memcg, nr_pages - high,\nmm/memcontrol.c-4873-\t\t\t\t\tGFP_KERNEL, MEMCG_RECLAIM_MAY_SWAP, NULL);\n--\nmm/memcontrol.c=4889=static ssize_t memory_max_write(struct kernfs_open_file of,\n--\nmm/memcontrol.c-4930-\t\tif (nr_reclaims) {\nmm/memcontrol.c:4931:\t\t\tif (!try_to_free_mem_cgroup_pages(memcg, nr_pages - max,\nmm/memcontrol.c-4932-\t\t\t\t\tGFP_KERNEL, MEMCG_RECLAIM_MAY_SWAP, NULL))\n--\nmm/vmscan.c=6893=unsigned long mem_cgroup_shrink_node(struct mem_cgroup memcg,\n--\nmm/vmscan.c-6932-\nmm/vmscan.c:6933:unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup memcg,\nmm/vmscan.c-6934-\t\t\t\t\t unsigned long nr_pages,\n--\nmm/vmscan.c-6973-#else\nmm/vmscan.c:6974:unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup memcg,\nmm/vmscan.c-6975-\t\t\t\t\t unsigned long nr_pages,\n--\nmm/vmscan.c=8036=int user_proactive_reclaim(char buf,\n--\nmm/vmscan.c-8107-\t\t\t\t\t MEMCG_RECLAIM_PROACTIVE;\nmm/vmscan.c:8108:\t\t\treclaimed = try_to_free_mem_cgroup_pages(memcg,\nmm/vmscan.c-8109-\t\t\t\t\t\t batch_size, gfp_mask,\n" }
25/2	2026/08/01 15:49	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 17687 output: 21 thoughts: 66 Thoughts: Okay, let's break this down. Diving into Cgroup Memory Management `try_to_free_mem_cgroup_pages`... now that's a function name that grabs my attention. It clearly targets memory pressure within a cgroup. I like that. But what else is in play here? Ah, that's the beauty of cgroup v2, there is `user_proactive_reclaim`. That's invoked when we write to `memory.reclaim`, which is the user interface to trigger memory reclamation. I need to dive into `user_proactive_reclaim`. Time to dig in and see how it works!
26/2	2026/08/01 15:49	tool	grepper	0m Args: { "Expression": "user_proactive_reclaim" } Results: { "Output": "mm/internal.h=703=extern void reclaim_throttle(pg_data_t pgdat, enum vmscan_throttle_state reason);\nmm/internal.h:704:int user_proactive_reclaim(char buf,\nmm/internal.h-705-\t\t\t struct mem_cgroup memcg, pg_data_t pgdat);\n--\nmm/memcontrol.c=5065=static ssize_t memory_reclaim(struct kernfs_open_file of, char buf,\n--\nmm/memcontrol.c-5070-\nmm/memcontrol.c:5071:\tret = user_proactive_reclaim(buf, memcg, NULL);\nmm/memcontrol.c-5072-\tif (ret)\n--\nmm/vmscan.c=8030=static const match_table_t tokens = {\n--\nmm/vmscan.c-8035-\nmm/vmscan.c:8036:int user_proactive_reclaim(char buf,\nmm/vmscan.c-8037-\t\t\t struct mem_cgroup memcg, pg_data_t pgdat)\n--\nmm/vmscan.c=8189=static ssize_t reclaim_store(struct device dev,\n--\nmm/vmscan.c-8194-\nmm/vmscan.c:8195:\tret = user_proactive_reclaim((char *)buf, NULL, NODE_DATA(nid));\nmm/vmscan.c-8196-\treturn ret ? ret : count;\n" }
27/2	2026/08/01 15:50	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 18324 output: 17 thoughts: 70 Thoughts: Exploring MGLRU Usability Okay, so `user_proactive_reclaim` looks like a solid starting point for focusing our efforts. I need to investigate further - are there any other functions specifically within MGLRU that could be invoked from userspace? Let's dig deeper. The `run_cmd` function in `mm/vmscan.c` is called from debugfs, which is interesting. Time to delve into `run_cmd` and see what that function does.
28/2	2026/08/01 15:50	tool	grepper	0m Args: { "Expression": "run_cmd" } Results: { "Output": "\nFull output is too long, showing 500 out of 8454 lines.\nUse more precise expression if possible.\n\narch/powerpc/boot/wrapper=68=usage() {\n--\narch/powerpc/boot/wrapper-75-\narch/powerpc/boot/wrapper:76:run_cmd() {\narch/powerpc/boot/wrapper-77- if [ \"$V\" = 1 ]; then\n--\narch/powerpc/boot/wrapper=530=ps3)\n--\narch/powerpc/boot/wrapper-554-\narch/powerpc/boot/wrapper:555: run_cmd dd if=\"$ofile.bin\" of=\"$ofile.bin\" conv=notrunc \\\narch/powerpc/boot/wrapper-556- skip=$overlay_dest seek=$system_reset_kernel \\\n--\narch/powerpc/boot/wrapper-558-\narch/powerpc/boot/wrapper:559: run_cmd dd if=\"$ofile.bin\" of=\"$ofile.bin\" conv=notrunc \\\narch/powerpc/boot/wrapper-560- skip=$system_reset_overlay seek=$overlay_dest \\\n--\ndrivers/crypto/ccp/ccp-dev.c=434=int ccp_cmd_queue_thread(void data)\n--\ndrivers/crypto/ccp/ccp-dev.c-455-\t\t/ Execute the command /\ndrivers/crypto/ccp/ccp-dev.c:456:\t\tcmd-\u003eret = ccp_run_cmd(cmd_q, cmd);\ndrivers/crypto/ccp/ccp-dev.c-457-\n--\ndrivers/crypto/ccp/ccp-dev.h=639=int ccp_trng_read(struct hwrng rng, void data, size_t max, bool wait);\ndrivers/crypto/ccp/ccp-dev.h-640-\ndrivers/crypto/ccp/ccp-dev.h:641:int ccp_run_cmd(struct ccp_cmd_queue cmd_q, struct ccp_cmd cmd);\ndrivers/crypto/ccp/ccp-dev.h-642-\n--\ndrivers/crypto/ccp/ccp-ops.c=2450=ccp_run_ecc_cmd(struct ccp_cmd_queue cmd_q, struct ccp_cmd cmd)\n--\ndrivers/crypto/ccp/ccp-ops.c-2475-\ndrivers/crypto/ccp/ccp-ops.c:2476:int ccp_run_cmd(struct ccp_cmd_queue cmd_q, struct ccp_cmd cmd)\ndrivers/crypto/ccp/ccp-ops.c-2477-{\n--\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c=227=struct g2d_runqueue_node {\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-228-\tstruct list_head\tlist;\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c:229:\tstruct list_head\trun_cmdlist;\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-230-\tstruct list_head\tevent_list;\n--\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c=800=static void g2d_dma_start(struct g2d_data g2d,\n--\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-803-\tstruct g2d_cmdlist_node node =\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c:804:\t\t\t\tlist_first_entry(\u0026runqueue_node-\u003erun_cmdlist,\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-805-\t\t\t\t\t\tstruct g2d_cmdlist_node, list);\n--\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c=825=static void g2d_free_runqueue_node(struct g2d_data g2d,\n--\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-831-\t/\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c:832:\t commands in run_cmdlist have been completed so unmap all gem\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-833-\t * objects in each command node so that they are unreferenced.\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-834-\t /\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c:835:\tlist_for_each_entry(node, \u0026runqueue_node-\u003erun_cmdlist, list)\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-836-\t\tg2d_unmap_cmdlist_gem(g2d, node, runqueue_node-\u003efilp);\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c:837:\tlist_splice_tail_init(\u0026runqueue_node-\u003erun_cmdlist, \u0026g2d-\u003efree_cmdlist);\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-838-\tmutex_unlock(\u0026g2d-\u003ecmdlist_mutex);\n--\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c=1299=int exynos_g2d_exec_ioctl(struct drm_device drm_dev, void data,\n--\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-1306-\tstruct g2d_runqueue_node runqueue_node;\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c:1307:\tstruct list_head run_cmdlist;\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-1308-\tstruct list_head event_list;\n--\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-1313-\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c:1314:\trun_cmdlist = \u0026runqueue_node-\u003erun_cmdlist;\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-1315-\tevent_list = \u0026runqueue_node-\u003eevent_list;\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c:1316:\tINIT_LIST_HEAD(run_cmdlist);\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-1317-\tINIT_LIST_HEAD(event_list);\n--\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-1320-\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c:1321:\tlist_splice_init(\u0026file_priv-\u003einuse_cmdlist, run_cmdlist);\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-1322-\tlist_splice_init(\u0026file_priv-\u003eevent_list, event_list);\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-1323-\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c:1324:\tif (list_empty(run_cmdlist)) {\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-1325-\t\tdev_err(g2d-\u003edev, \"there is no inuse cmdlist\\n\");\n--\ndrivers/media/platform/chips-media/coda/coda-bit.c=939=int coda_check_firmware(struct coda_dev dev)\n--\ndrivers/media/platform/chips-media/coda/coda-bit.c-960-\t\tret = -EIO;\ndrivers/media/platform/chips-media/coda/coda-bit.c:961:\t\tgoto err_run_cmd;\ndrivers/media/platform/chips-media/coda/coda-bit.c-962-\t}\n--\ndrivers/media/platform/chips-media/coda/coda-bit.c-1001-\ndrivers/media/platform/chips-media/coda/coda-bit.c:1002:err_run_cmd:\ndrivers/media/platform/chips-media/coda/coda-bit.c-1003-\tclk_disable_unprepare(dev-\u003eclk_ahb);\n--\ndrivers/net/mdio/mdio-realtek-rtl9300.c=173=static struct otto_emdio_priv otto_emdio_bus_to_priv(struct mii_bus bus)\n--\ndrivers/net/mdio/mdio-realtek-rtl9300.c-179-\ndrivers/net/mdio/mdio-realtek-rtl9300.c:180:static int otto_emdio_run_cmd(struct mii_bus bus, u32 cmd,\ndrivers/net/mdio/mdio-realtek-rtl9300.c-181-\t\t\t struct otto_emdio_cmd_regs cmd_data)\n--\ndrivers/net/mdio/mdio-realtek-rtl9300.c=237=static int otto_emdio_read_cmd(struct mii_bus bus, u32 cmd,\n--\ndrivers/net/mdio/mdio-realtek-rtl9300.c-243-\tlockdep_assert_held(\u0026priv-\u003elock);\ndrivers/net/mdio/mdio-realtek-rtl9300.c:244:\tret = otto_emdio_run_cmd(bus, cmd \| priv-\u003einfo-\u003ecmd_read, cmd_data);\ndrivers/net/mdio/mdio-realtek-rtl9300.c-245-\tif (ret)\n--\ndrivers/net/mdio/mdio-realtek-rtl9300.c=257=static int otto_emdio_write_cmd(struct mii_bus bus, u32 cmd,\n--\ndrivers/net/mdio/mdio-realtek-rtl9300.c-263-\ndrivers/net/mdio/mdio-realtek-rtl9300.c:264:\treturn otto_emdio_run_cmd(bus, cmd \| priv-\u003einfo-\u003ecmd_write, cmd_data);\ndrivers/net/mdio/mdio-realtek-rtl9300.c-265-}\n--\nkernel/reboot.c=840=static const char reboot_cmd[] = \"/sbin/reboot\";\nkernel/reboot.c-841-\nkernel/reboot.c:842:static int run_cmd(const char cmd)\nkernel/reboot.c-843-{\n--\nkernel/reboot.c=862=static int __orderly_reboot(void)\n--\nkernel/reboot.c-865-\nkernel/reboot.c:866:\tret = run_cmd(reboot_cmd);\nkernel/reboot.c-867-\n--\nkernel/reboot.c=877=static int __orderly_poweroff(bool force)\n--\nkernel/reboot.c-880-\nkernel/reboot.c:881:\tret = run_cmd(poweroff_cmd);\nkernel/reboot.c-882-\n--\nmm/vmscan.c=5757=static int run_eviction(struct lruvec lruvec, unsigned long seq, struct scan_control sc,\n--\nmm/vmscan.c-5786-\nmm/vmscan.c:5787:static int run_cmd(char cmd, u64 memcg_id, int nid, unsigned long seq,\nmm/vmscan.c-5788-\t\t struct scan_control sc, int swappiness, unsigned long opt)\n--\nmm/vmscan.c=5829=static ssize_t lru_gen_seq_write(struct file file, const char __user src,\n--\nmm/vmscan.c-5897-\nmm/vmscan.c:5898:\t\terr = run_cmd(cmd, memcg_id, nid, seq, \u0026sc, swappiness, opt);\nmm/vmscan.c-5899-\t\tif (err)\n--\nscripts/coccicheck=135=fi\nscripts/coccicheck-136-\nscripts/coccicheck:137:run_cmd_parmap() {\nscripts/coccicheck-138-\tif [ $VERBOSE -ne 0 ] ; then\n--\nscripts/coccicheck-155-\nscripts/coccicheck:156:run_cmd_old() {\nscripts/coccicheck-157-\tlocal i\n--\nscripts/coccicheck-170-\nscripts/coccicheck:171:run_cmd() {\nscripts/coccicheck-172-\tif [ \"$USE_JOBS\" = \"yes\" ]; then\nscripts/coccicheck:173:\t\trun_cmd_parmap $@\nscripts/coccicheck-174-\telse\nscripts/coccicheck:175:\t\trun_cmd_old $@\nscripts/coccicheck-176-\tfi\n--\nscripts/coccicheck=191=coccinelle () {\n--\nscripts/coccicheck-242- if [ \"$MODE\" = \"chain\" ] ; then\nscripts/coccicheck:243:\trun_cmd $SPATCH -D patch \\\nscripts/coccicheck-244-\t\t$FLAGS --cocci-file $COCCI $OPT $OPTIONS \|\| \\\nscripts/coccicheck:245:\trun_cmd $SPATCH -D report \\\nscripts/coccicheck-246-\t\t$FLAGS --cocci-file $COCCI $OPT $OPTIONS --no-show-diff \|\| \\\nscripts/coccicheck:247:\trun_cmd $SPATCH -D context \\\nscripts/coccicheck-248-\t\t$FLAGS --cocci-file $COCCI $OPT $OPTIONS \|\| \\\nscripts/coccicheck:249:\trun_cmd $SPATCH -D org \\\nscripts/coccicheck-250-\t\t$FLAGS --cocci-file $COCCI $OPT $OPTIONS --no-show-diff \|\| exit 1\nscripts/coccicheck-251- elif [ \"$MODE\" = \"rep+ctxt\" ] ; then\nscripts/coccicheck:252:\trun_cmd $SPATCH -D report \\\nscripts/coccicheck-253-\t\t$FLAGS --cocci-file $COCCI $OPT $OPTIONS --no-show-diff \u0026\u0026 \\\nscripts/coccicheck:254:\trun_cmd $SPATCH -D context \\\nscripts/coccicheck-255-\t\t$FLAGS --cocci-file $COCCI $OPT $OPTIONS \|\| exit 1\nscripts/coccicheck-256- else\nscripts/coccicheck:257:\trun_cmd $SPATCH -D $MODE $FLAGS --cocci-file $COCCI $OPT $OPTIONS \|\| exit 1\nscripts/coccicheck-258- fi\n--\ntools/bootconfig/scripts/bconf2ftrace.sh=39=fi\ntools/bootconfig/scripts/bconf2ftrace.sh-40-\ntools/bootconfig/scripts/bconf2ftrace.sh:41:run_cmd() { # command\ntools/bootconfig/scripts/bconf2ftrace.sh-42-\techo \"$\"\n--\ntools/bootconfig/scripts/bconf2ftrace.sh=77=set_value_of() { # key file\n--\ntools/bootconfig/scripts/bconf2ftrace.sh-79-\t\tval=`xbc_get_val $1 1`\ntools/bootconfig/scripts/bconf2ftrace.sh:80:\t\trun_cmd \"echo '$val' \u003e\u003e $2\"\ntools/bootconfig/scripts/bconf2ftrace.sh-81-\tfi\n--\ntools/bootconfig/scripts/bconf2ftrace.sh=84=set_array_of() { # key file\n--\ntools/bootconfig/scripts/bconf2ftrace.sh-86-\t\txbc_get_val $1 \| while read line; do\ntools/bootconfig/scripts/bconf2ftrace.sh:87:\t\t\trun_cmd \"echo '$line' \u003e\u003e $2\"\ntools/bootconfig/scripts/bconf2ftrace.sh-88-\t\tdone\n--\ntools/bootconfig/scripts/bconf2ftrace.sh=170=setup_one_histogram() { # prefix trigger-file\ntools/bootconfig/scripts/bconf2ftrace.sh:171:\trun_cmd \"echo '`print_one_histogram ${1}`' \u003e\u003e ${2}\"\ntools/bootconfig/scripts/bconf2ftrace.sh-172-}\n--\ntools/bootconfig/scripts/bconf2ftrace.sh=183=setup_event() { # prefix group event [instance]\n--\ntools/bootconfig/scripts/bconf2ftrace.sh-191-\tif [ \"$3\" = \"enable\" ]; then\ntools/bootconfig/scripts/bconf2ftrace.sh:192:\t\trun_cmd \"echo 1 \u003e ${eventdir}\"\ntools/bootconfig/scripts/bconf2ftrace.sh-193-\t\treturn\n--\ntools/bootconfig/scripts/bconf2ftrace.sh-198-\t\txbc_get_val ${branch}.probes \| while read line; do\ntools/bootconfig/scripts/bconf2ftrace.sh:199:\t\t\trun_cmd \"echo 'p:kprobes/$3 $line' \u003e\u003e $TRACEFS/kprobe_events\"\ntools/bootconfig/scripts/bconf2ftrace.sh-200-\t\tdone\n--\ntools/bootconfig/scripts/bconf2ftrace.sh-202-\tsynthetic)\ntools/bootconfig/scripts/bconf2ftrace.sh:203:\t\trun_cmd \"echo '`compose_synth $3 ${branch}.fields`' \u003e\u003e $TRACEFS/synthetic_events\"\ntools/bootconfig/scripts/bconf2ftrace.sh-204-\t\t;;\n--\ntools/bootconfig/scripts/bconf2ftrace.sh-212-\tif xbc_has_key ${branch}.enable; then\ntools/bootconfig/scripts/bconf2ftrace.sh:213:\t\trun_cmd \"echo 1 \u003e ${eventdir}/enable\"\ntools/bootconfig/scripts/bconf2ftrace.sh-214-\tfi\n--\ntools/bootconfig/scripts/bconf2ftrace.sh=217=setup_events() { # prefix(\"ftrace\" or \"ftrace.instance.INSTANCE\") [instance]\n--\ntools/bootconfig/scripts/bconf2ftrace.sh-225-\t\tif [ \"$2\" ]; then\ntools/bootconfig/scripts/bconf2ftrace.sh:226:\t\t\trun_cmd \"echo 1 \u003e $TRACEFS/instances/$2/events/enable\"\ntools/bootconfig/scripts/bconf2ftrace.sh-227-\t\telse\ntools/bootconfig/scripts/bconf2ftrace.sh:228:\t\t\trun_cmd \"echo 1 \u003e $TRACEFS/events/enable\"\ntools/bootconfig/scripts/bconf2ftrace.sh-229-\t\tfi\n--\ntools/bootconfig/scripts/bconf2ftrace.sh=244=setup_instance() { # [instance]\n--\ntools/bootconfig/scripts/bconf2ftrace.sh-263-\tif xbc_has_key ${instance}.alloc_snapshot; then\ntools/bootconfig/scripts/bconf2ftrace.sh:264:\t\trun_cmd \"echo 1 \u003e ${instancedir}/snapshot\"\ntools/bootconfig/scripts/bconf2ftrace.sh-265-\tfi\n--\ntools/bootconfig/scripts/bconf2ftrace.sh-269-\t\tsize=`eval size2kb $size`\ntools/bootconfig/scripts/bconf2ftrace.sh:270:\t\trun_cmd \"echo $size \u003e\u003e ${instancedir}/buffer_size_kb\"\ntools/bootconfig/scripts/bconf2ftrace.sh-271-\tfi\n--\ntools/bootconfig/scripts/bconf2ftrace.sh=278=if xbc_has_key \"kernel.dump_on_oops\"; then\n--\ntools/bootconfig/scripts/bconf2ftrace.sh-280-\t[ \"$dump_mode\" ] \u0026\u0026 dump_mode=`eval echo $dump_mode` \|\| dump_mode=1\ntools/bootconfig/scripts/bconf2ftrace.sh:281:\trun_cmd \"echo \\\"$dump_mode\\\" \u003e /proc/sys/kernel/ftrace_dump_on_oops\"\ntools/bootconfig/scripts/bconf2ftrace.sh-282-fi\n--\ntools/bootconfig/scripts/bconf2ftrace.sh=295=if xbc_has_branch \"ftrace.instance\"; then\ntools/bootconfig/scripts/bconf2ftrace.sh-296-\tfor i in `xbc_subkeys \"ftrace.instance\" 1`; do\ntools/bootconfig/scripts/bconf2ftrace.sh:297:\t\trun_cmd \"mkdir -p $TRACEFS/instances/$i\"\ntools/bootconfig/scripts/bconf2ftrace.sh-298-\t\tsetup_instance $i\n--\ntools/perf/tests/shell/lib/attr.py=147=class Test(object):\n--\ntools/perf/tests/shell/lib/attr.py-281-\ntools/perf/tests/shell/lib/attr.py:282: def run_cmd(self, tempdir):\ntools/perf/tests/shell/lib/attr.py-283- junk1, junk2, junk3, junk4, myarch = (os.uname())\n--\ntools/perf/tests/shell/lib/attr.py-378- # run the test script\ntools/perf/tests/shell/lib/attr.py:379: self.run_cmd(tempdir);\ntools/perf/tests/shell/lib/attr.py-380-\n--\ntools/testing/kunit/run_checks.py=36=def main(argv: Sequence[str]) -\u003e None:\n--\ntools/testing/kunit/run_checks.py-45-\t\t\tcontinue\ntools/testing/kunit/run_checks.py:46:\t\tf = executor.submit(run_cmd, argv)\ntools/testing/kunit/run_checks.py-47-\t\tfuture_to_name[f] = name\n--\ntools/testing/kunit/run_checks.py-75-\ntools/testing/kunit/run_checks.py:76:def run_cmd(argv: Sequence[str]) -\u003e None:\ntools/testing/kunit/run_checks.py-77-\tsubprocess.check_output(argv, stderr=subprocess.STDOUT, cwd=ABS_TOOL_PATH, timeout=TIMEOUT)\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c=25=struct verity_info {\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-36-/* Run a command and optionally capture the first line of stdout. /\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:37:static int run_cmd(const char cmd, char out, size_t out_sz)\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-38-{\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c=57=static bool has_prerequisites(void)\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-63-\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:64:\tif (run_cmd(\"modprobe loop 2\u003e/dev/null\", NULL, 0) \u0026\u0026\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:65:\t run_cmd(\"ls /dev/loop-control 2\u003e/dev/null\", NULL, 0)) {\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-66-\t\tprintf(\"SKIP: no loop device support\\n\");\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-69-\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:70:\tif (run_cmd(\"modprobe dm-verity 2\u003e/dev/null\", NULL, 0) \u0026\u0026\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:71:\t run_cmd(\"dmsetup targets 2\u003e/dev/null \| grep -q verity\", NULL, 0)) {\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-72-\t\tprintf(\"SKIP: dm-verity module not available\\n\");\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-75-\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:76:\tif (run_cmd(\"which veritysetup \u003e/dev/null 2\u003e\u00261\", NULL, 0)) {\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-77-\t\tprintf(\"SKIP: veritysetup not found\\n\");\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c=84=void test_lsm_bdev(void)\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-105-\tsnprintf(cmd, sizeof(cmd), \"dmsetup remove %s 2\u003e/dev/null\", DM_NAME);\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:106:\trun_cmd(cmd, NULL, 0);\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-107-\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-132-\t\t \"losetup --find --show %s 2\u003e/dev/null\", data_img);\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:133:\tif (!ASSERT_OK(run_cmd(cmd, data_loop, sizeof(data_loop)),\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-134-\t\t \"losetup data\"))\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-138-\t\t \"losetup --find --show %s 2\u003e/dev/null\", hash_img);\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:139:\tif (!ASSERT_OK(run_cmd(cmd, hash_loop, sizeof(hash_loop)),\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-140-\t\t \"losetup hash\"))\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-147-\t\t data_loop, hash_loop);\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:148:\tif (!ASSERT_OK(run_cmd(cmd, roothash, sizeof(roothash)),\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-149-\t\t \"veritysetup format\"))\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-167-\t\t data_loop, DM_NAME, hash_loop, roothash);\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:168:\tif (!ASSERT_OK(run_cmd(cmd, NULL, 0), \"veritysetup open\"))\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-169-\t\tgoto teardown;\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-198-\tsnprintf(cmd, sizeof(cmd), \"dmsetup remove %s 2\u003e/dev/null\", DM_NAME);\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:199:\trun_cmd(cmd, NULL, 0);\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-200-\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-204-\t\t\t data_loop);\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:205:\t\trun_cmd(cmd, NULL, 0);\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-206-\t}\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-209-\t\t\t hash_loop);\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:210:\t\trun_cmd(cmd, NULL, 0);\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-211-\t}\n--\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py=97=class RecordValuePicker:\n--\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py-120-\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py:121:def run_cmd(cmd, json=False):\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py-122- out = subprocess.check_output(cmd, shell=True)\n--\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py=128=def run_json_cmd(cmd):\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py:129: return run_cmd(cmd, json=True)\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py-130-\n--\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py=172=class Pool(CommonItem):\n--\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py-175- def dl_set(self, dlname, size, thtype):\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py:176: run_cmd(\"devlink sb pool set {} sb {} pool {} size {} thtype {}\".format(dlname, self[\"sb\"],\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py-177- self[\"pool\"],\n--\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py=230=class TcBind(CommonItem):\n--\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py-237- def dl_set(self, pool, th):\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py:238: run_cmd(\"devlink sb tc bind set {} sb {} tc {} type {} pool {} th {}\".format(self[\"dlportname\"],\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py-239- self[\"sb\"],\n--\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py=304=class PortPool(CommonItem):\n--\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py-311- def dl_set(self, th):\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py:312: run_cmd(\"devlink sb port pool set {} sb {} pool {} th {}\".format(self[\"dlportname\"],\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py-313- self[\"sb\"],\n--\ntools/testing/selftests/net/fcnal-test.sh=195=set_ping_group()\n--\ntools/testing/selftests/net/fcnal-test.sh-203-\ntools/testing/selftests/net/fcnal-test.sh:204:do_run_cmd()\ntools/testing/selftests/net/fcnal-test.sh-205-{\n--\ntools/testing/selftests/net/fcnal-test.sh-221-\ntools/testing/selftests/net/fcnal-test.sh:222:run_cmd()\ntools/testing/selftests/net/fcnal-test.sh-223-{\ntools/testing/selftests/net/fcnal-test.sh:224:\tdo_run_cmd ${NSA_CMD} $\ntools/testing/selftests/net/fcnal-test.sh-225-}\ntools/testing/selftests/net/fcnal-test.sh-226-\ntools/testing/selftests/net/fcnal-test.sh:227:run_cmd_nsb()\ntools/testing/selftests/net/fcnal-test.sh-228-{\ntools/testing/selftests/net/fcnal-test.sh:229:\tdo_run_cmd ${NSB_CMD} $\ntools/testing/selftests/net/fcnal-test.sh-230-}\ntools/testing/selftests/net/fcnal-test.sh-231-\ntools/testing/selftests/net/fcnal-test.sh:232:run_cmd_nsc()\ntools/testing/selftests/net/fcnal-test.sh-233-{\ntools/testing/selftests/net/fcnal-test.sh:234:\tdo_run_cmd ${NSC_CMD} $\ntools/testing/selftests/net/fcnal-test.sh-235-}\n--\ntools/testing/selftests/net/fcnal-test.sh=237=setup_cmd()\n--\ntools/testing/selftests/net/fcnal-test.sh-241-\ntools/testing/selftests/net/fcnal-test.sh:242:\trun_cmd ${cmd}\ntools/testing/selftests/net/fcnal-test.sh-243-\trc=$?\n--\ntools/testing/selftests/net/fcnal-test.sh=259=setup_cmd_nsb()\n--\ntools/testing/selftests/net/fcnal-test.sh-263-\ntools/testing/selftests/net/fcnal-test.sh:264:\trun_cmd_nsb ${cmd}\ntools/testing/selftests/net/fcnal-test.sh-265-\trc=$?\n--\ntools/testing/selftests/net/fcnal-test.sh=281=setup_cmd_nsc()\n--\ntools/testing/selftests/net/fcnal-test.sh-285-\ntools/testing/selftests/net/fcnal-test.sh:286:\trun_cmd_nsc ${cmd}\ntools/testing/selftests/net/fcnal-test.sh-287-\trc=$?\n--\ntools/testing/selftests/net/fcnal-test.sh=304=set_sysctl()\n--\ntools/testing/selftests/net/fcnal-test.sh-307-\techo\ntools/testing/selftests/net/fcnal-test.sh:308:\trun_cmd sysctl -q -w $*\ntools/testing/selftests/net/fcnal-test.sh-309-}\n--\ntools/testing/selftests/net/fcnal-test.sh=584=ipv4_ping_novrf()\n--\ntools/testing/selftests/net/fcnal-test.sh-593-\t\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:594:\t\trun_cmd ping -c1 -w1 ${a}\ntools/testing/selftests/net/fcnal-test.sh-595-\t\tlog_test_addr ${a} $? 0 \"ping out\"\n--\ntools/testing/selftests/net/fcnal-test.sh-597-\t\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:598:\t\trun_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}\ntools/testing/selftests/net/fcnal-test.sh-599-\t\tlog_test_addr ${a} $? 0 \"ping out, device bind\"\n--\ntools/testing/selftests/net/fcnal-test.sh-601-\t\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:602:\t\trun_cmd ping -c1 -w1 -I ${NSA_LO_IP} ${a}\ntools/testing/selftests/net/fcnal-test.sh-603-\t\tlog_test_addr ${a} $? 0 \"ping out, address bind\"\n--\ntools/testing/selftests/net/fcnal-test.sh-610-\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:611:\trun_cmd ping -c 1 -w 1 -r ${a}\ntools/testing/selftests/net/fcnal-test.sh-612-\tlog_test_addr ${a} $? 0 \"ping out (don't route), peer on link\"\n--\ntools/testing/selftests/net/fcnal-test.sh-616-\tshow_hint \"Fails since peer is not on link\"\ntools/testing/selftests/net/fcnal-test.sh:617:\trun_cmd ping -c 1 -w 1 -r ${a}\ntools/testing/selftests/net/fcnal-test.sh-618-\tlog_test_addr ${a} $? 1 \"ping out (don't route), peer not on link\"\n--\ntools/testing/selftests/net/fcnal-test.sh-625-\t\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:626:\t\trun_cmd_nsb ping -c1 -w1 ${a}\ntools/testing/selftests/net/fcnal-test.sh-627-\t\tlog_test_addr ${a} $? 0 \"ping in\"\n--\ntools/testing/selftests/net/fcnal-test.sh-635-\t\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:636:\t\trun_cmd ping -c1 -w1 ${a}\ntools/testing/selftests/net/fcnal-test.sh-637-\t\tlog_test_addr ${a} $? 0 \"ping local\"\n--\ntools/testing/selftests/net/fcnal-test.sh-645-\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:646:\trun_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}\ntools/testing/selftests/net/fcnal-test.sh-647-\tlog_test_addr ${a} $? 0 \"ping local, device bind\"\n--\ntools/testing/selftests/net/fcnal-test.sh-655-\t\tshow_hint \"Fails since address on loopback device is out of device scope\"\ntools/testing/selftests/net/fcnal-test.sh:656:\t\trun_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}\ntools/testing/selftests/net/fcnal-test.sh-657-\t\tlog_test_addr ${a} $? 1 \"ping local, device bind\"\n--\ntools/testing/selftests/net/fcnal-test.sh-669-\ta=${NSB_LO_IP}\ntools/testing/selftests/net/fcnal-test.sh:670:\trun_cmd ping -c1 -w1 ${a}\ntools/testing/selftests/net/fcnal-test.sh-671-\tlog_test_addr ${a} $? 2 \"ping out, blocked by rule\"\n--\ntools/testing/selftests/net/fcnal-test.sh-675-\t# case succeeds despite the rule\ntools/testing/selftests/net/fcnal-test.sh:676:\t# run_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}\ntools/testing/selftests/net/fcnal-test.sh-677-\n--\ntools/testing/selftests/net/fcnal-test.sh-680-\tshow_hint \"Response generates ICMP (or arp request is ignored) due to ip rule\"\ntools/testing/selftests/net/fcnal-test.sh:681:\trun_cmd_nsb ping -c1 -w1 ${a}\ntools/testing/selftests/net/fcnal-test.sh-682-\tlog_test_addr ${a} $? 1 \"ping in, blocked by rule\"\n--\ntools/testing/selftests/net/fcnal-test.sh-697-\ta=${NSB_LO_IP}\ntools/testing/selftests/net/fcnal-test.sh:698:\trun_cmd ping -c1 -w1 ${a}\ntools/testing/selftests/net/fcnal-test.sh-699-\tlog_test_addr ${a} $? 2 \"ping out, blocked by route\"\n--\ntools/testing/selftests/net/fcnal-test.sh-703-\t# case succeeds despite not having a route for the address\ntools/testing/selftests/net/fcnal-test.sh:704:\t# run_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}\ntools/testing/selftests/net/fcnal-test.sh-705-\n--\ntools/testing/selftests/net/fcnal-test.sh-708-\tshow_hint \"Response is dropped (or arp request is ignored) due to ip route\"\ntools/testing/selftests/net/fcnal-test.sh:709:\trun_cmd_nsb ping -c1 -w1 ${a}\ntools/testing/selftests/net/fcnal-test.sh-710-\tlog_test_addr ${a} $? 1 \"ping in, blocked by route\"\n--\ntools/testing/selftests/net/fcnal-test.sh-718-\ta=${NSB_LO_IP}\ntools/testing/selftests/net/fcnal-test.sh:719:\trun_cmd ping -c1 -w1 ${a}\ntools/testing/selftests/net/fcnal-test.sh-720-\tlog_test_addr ${a} $? 2 \"ping out, unreachable default route\"\n--\ntools/testing/selftests/net/fcnal-test.sh-724-\t# case succeeds despite not having a route for the address\ntools/testing/selftests/net/fcnal-test.sh:725:\t# run_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}\ntools/testing/selftests/net/fcnal-test.sh-726-}\n--\ntools/testing/selftests/net/fcnal-test.sh=728=ipv4_ping_vrf()\n--\ntools/testing/selftests/net/fcnal-test.sh-740-\t\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:741:\t\trun_cmd ping -c1 -w1 -I ${VRF} ${a}\ntools/testing/selftests/net/fcnal-test.sh-742-\t\tlog_test_addr ${a} $? 0 \"ping out, VRF bind\"\n--\ntools/testing/selftests/net/fcnal-test.sh-744-\t\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:745:\t\trun_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}\ntools/testing/selftests/net/fcnal-test.sh-746-\t\tlog_test_addr ${a} $? 0 \"ping out, device bind\"\n--\ntools/testing/selftests/net/fcnal-test.sh-748-\t\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:749:\t\trun_cmd ip vrf exec ${VRF} ping -c1 -w1 -I ${NSA_IP} ${a}\ntools/testing/selftests/net/fcnal-test.sh-750-\t\tlog_test_addr ${a} $? 0 \"ping out, vrf device + dev address bind\"\n--\ntools/testing/selftests/net/fcnal-test.sh-752-\t\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:753:\t\trun_cmd ip vrf exec ${VRF} ping -c1 -w1 -I ${VRF_IP} ${a}\ntools/testing/selftests/net/fcnal-test.sh-754-\t\tlog_test_addr ${a} $? 0 \"ping out, vrf device + vrf address bind\"\n--\ntools/testing/selftests/net/fcnal-test.sh-762-\t\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:763:\t\trun_cmd_nsb ping -c1 -w1 ${a}\ntools/testing/selftests/net/fcnal-test.sh-764-\t\tlog_test_addr ${a} $? 0 \"ping in\"\n--\ntools/testing/selftests/net/fcnal-test.sh-773-\t\tshow_hint \"Source address should be ${a}\"\ntools/testing/selftests/net/fcnal-test.sh:774:\t\trun_cmd ping -c1 -w1 -I ${VRF} ${a}\ntools/testing/selftests/net/fcnal-test.sh-775-\t\tlog_test_addr ${a} $? 0 \"ping local, VRF bind\"\n--\ntools/testing/selftests/net/fcnal-test.sh-783-\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:784:\trun_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}\ntools/testing/selftests/net/fcnal-test.sh-785-\tlog_test_addr ${a} $? 0 \"ping local, device bind\"\n--\ntools/testing/selftests/net/fcnal-test.sh-791-\t\tshow_hint \"Fails since address on vrf device is out of device scope\"\ntools/testing/selftests/net/fcnal-test.sh:792:\t\trun_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}\ntools/testing/selftests/net/fcnal-test.sh-793-\t\tlog_test_addr ${a} $? 2 \"ping local, device bind\"\n--\ntools/testing/selftests/net/fcnal-test.sh-803-\ta=${NSB_LO_IP}\ntools/testing/selftests/net/fcnal-test.sh:804:\trun_cmd ping -c1 -w1 -I ${VRF} ${a}\ntools/testing/selftests/net/fcnal-test.sh-805-\tlog_test_addr ${a} $? 2 \"ping out, vrf bind, blocked by rule\"\n--\ntools/testing/selftests/net/fcnal-test.sh-807-\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:808:\trun_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}\ntools/testing/selftests/net/fcnal-test.sh-809-\tlog_test_addr ${a} $? 2 \"ping out, device bind, blocked by rule\"\n--\ntools/testing/selftests/net/fcnal-test.sh-813-\tshow_hint \"Response lost due to ip rule\"\ntools/testing/selftests/net/fcnal-test.sh:814:\trun_cmd_nsb ping -c1 -w1 ${a}\n\n" }
29/2	2026/08/01 15:50	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 31013 output: 35 thoughts: 356 Thoughts: Analyzing MGLRU's Kernel Interactions Okay, so I'm digging into this MGLRU implementation. The core function of interest is `run_cmd` within `mm/vmscan.c`, but it's static. That's the first hurdle. The debugfs interface, `lru_gen_seq_write`, calls `run_cmd`, but it's also static, though it's registered as a file operation. Hmm, is there any other non-static function? Let's see… I know `lru_gen_do_aging` exists in `tools/testing/selftests/kvm/lib/lru_gen_util.c`, but that's userspace, so it's not relevant in this context. Right, `FocusSymbols` are supposed to be kernel functions! That's the key. The functions we can focus on are: `try_to_free_pages`, `try_to_free_mem_cgroup_pages`, `shrink_all_memory`, `user_proactive_reclaim`, and `balance_pgdat`. These seem to be the primary hooks, the heart of the changes. Let's confirm that `user_proactive_reclaim` is non-static and not inlined. Yes, it's defined in `mm/vmscan.c` and declared in `mm/internal.h`. Confirmed. Good. I'll need to remember that. `try_to_free_mem_cgroup_pages` looks to be non-static as well. That's another potential point of entry, and `shrink_all_memory` is also non-static. Now, I need to verify that `CONFIG_LRU_GEN` is the only config I need. It looks like the patch modifies both `mm/vmscan.c` and `include/linux/mmzone.h`. I need to ensure that the critical code changes are gated by the `#ifdef CONFIG_LRU_GEN` directives. I'll check `mm/vmscan.c` around line 3982 to confirm this. That should tell me if I have all the necessary components enabled.
30/2	2026/08/01 15:50	tool	read-file	0m Args: { "File": "mm/vmscan.c", "FirstLine": 3960, "LineCount": 50 } Results: { "Contents": "3960:\t\n3961:\t\t/* find the oldest populated generation /\n3962:\t\tfor_each_evictable_type(type, swappiness) {\n3963:\t\t\twhile (min_seq[type] + MIN_NR_GENS \u003c= lrugen-\u003emax_seq) {\n3964:\t\t\t\tgen = lru_gen_from_seq(min_seq[type]);\n3965:\t\n3966:\t\t\t\tfor (zone = 0; zone \u003c MAX_NR_ZONES; zone++) {\n3967:\t\t\t\t\tif (!list_empty(\u0026lrugen-\u003efolios[gen][type][zone]))\n3968:\t\t\t\t\t\tgoto next;\n3969:\t\t\t\t}\n3970:\t\n3971:\t\t\t\tmin_seq[type]++;\n3972:\t\t\t\tseq_inc_flag = true;\n3973:\t\t\t}\n3974:\tnext:\n3975:\t\t\t;\n3976:\t\t}\n3977:\t\n3978:\t\t/\n3979:\t\t * If min_seq[type] of both anonymous and file is not increased,\n3980:\t\t * return here to avoid unnecessary checking overhead later.\n3981:\t\t /\n3982:\t\tif (!seq_inc_flag)\n3983:\t\t\treturn;\n3984:\t\n3985:\t\tfor_each_evictable_type(type, swappiness) {\n3986:\t\t\tif (min_seq[type] \u003c= lrugen-\u003emin_seq[type])\n3987:\t\t\t\tcontinue;\n3988:\t\n3989:\t\t\treset_ctrl_pos(lruvec, type, true);\n3990:\t\t\tWRITE_ONCE(lrugen-\u003emin_seq[type], min_seq[type]);\n3991:\t\t}\n3992:\t}\n3993:\t\n3994:\tstatic bool inc_max_seq(struct lruvec lruvec, unsigned long seq, int swappiness)\n3995:\t{\n3996:\t\tbool success;\n3997:\t\tint prev, next;\n3998:\t\tint type, zone;\n3999:\t\tstruct lru_gen_folio *lrugen = \u0026lruvec-\u003elrugen;\n4000:\trestart:\n4001:\t\tif (seq \u003c READ_ONCE(lrugen-\u003emax_seq))\n4002:\t\t\treturn false;\n4003:\t\n4004:\t\tlruvec_lock_irq(lruvec);\n4005:\t\n4006:\t\tVM_WARN_ON_ONCE(!seq_is_valid(lruvec));\n4007:\t\n4008:\t\tsuccess = seq == lrugen-\u003emax_seq;\n4009:\t\tif (!success)\n" }
31/2	2026/08/01 15:50	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 32612 output: 33 thoughts: 71 Thoughts: Here's my summary, as though I'm thinking through this code: Diving into the MGLRU Configuration Okay, this looks like I'm inside the MGLRU code, perfect. Now, let's get a handle on the configuration options here. What are the key settings I need to be aware of? I know `CONFIG_LRU_GEN` is the big one, but I should probably double-check if there are any others that might influence the behavior, especially related to enabling it by default. Ah, yes, there it is! `CONFIG_LRU_GEN_ENABLED` looks like exactly what I'm looking for. It's probably used to set the default behavior. To be completely sure, I should really jump over to `mm/Kconfig` and refresh my memory on the specific details of `LRU_GEN` and any dependent options. Let's go take a look there...
32/2	2026/08/01 15:50	tool	read-file	0m Args: { "File": "mm/Kconfig", "FirstLine": 1400, "LineCount": 40 } Results: { "Contents": "1400:\t# multi-gen LRU {\n1401:\tconfig LRU_GEN\n1402:\t\tbool \"Multi-Gen LRU\"\n1403:\t\tdepends on MMU\n1404:\t\t# make sure folio-\u003eflags has enough spare bits\n1405:\t\tdepends on 64BIT \|\| !SPARSEMEM \|\| SPARSEMEM_VMEMMAP\n1406:\t\thelp\n1407:\t\t A high performance LRU implementation to overcommit memory. See\n1408:\t\t Documentation/admin-guide/mm/multigen_lru.rst for details.\n1409:\t\n1410:\tconfig LRU_GEN_ENABLED\n1411:\t\tbool \"Enable by default\"\n1412:\t\tdepends on LRU_GEN\n1413:\t\thelp\n1414:\t\t This option enables the multi-gen LRU by default.\n1415:\t\n1416:\tconfig LRU_GEN_STATS\n1417:\t\tbool \"Full stats for debugging\"\n1418:\t\tdepends on LRU_GEN\n1419:\t\thelp\n1420:\t\t Do not enable this option unless you plan to look at historical stats\n1421:\t\t from evicted generations for debugging purpose.\n1422:\t\n1423:\t\t This option has a per-memcg and per-node memory overhead.\n1424:\t\n1425:\tconfig LRU_GEN_WALKS_MMU\n1426:\t\tdef_bool y\n1427:\t\tdepends on LRU_GEN \u0026\u0026 ARCH_HAS_HW_PTE_YOUNG\n1428:\t# }\n1429:\t\n1430:\tconfig ARCH_SUPPORTS_PER_VMA_LOCK\n1431:\t def_bool n\n1432:\t\n1433:\tconfig PER_VMA_LOCK\n1434:\t\tdef_bool y\n1435:\t\tdepends on ARCH_SUPPORTS_PER_VMA_LOCK \u0026\u0026 MMU \u0026\u0026 SMP\n1436:\t\thelp\n1437:\t\t Allow per-vma locking during page fault handling.\n1438:\t\n1439:\t\t This feature allows locking each virtual memory area separately when\n" }
33/2	2026/08/01 15:50	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 33491 output: 18 thoughts: 617 Thoughts: My Fuzzing Strategy for Memory Reclaim Okay, so I'm looking at this patch and my initial thought is: `LRU_GEN` and `LRU_GEN_ENABLED` are the configurations involved. I'll make sure to include those in `EnableConfigs` since they seem central to this memory reclaim change. I've reviewed the patch itself and it's touching `mm/vmscan.c` and `include/linux/mmzone.h`. From what I can tell, the modifications are functional, involving changes to how the system handles swappiness checks, how it manages generation exhaustion during folio scans, retries with different folio types, and triggers aging based on exhaustion and imbalance. This is definitely worth a fuzzing campaign to uncover any subtle bugs. Now, let's nail down the critical symbols. I'm focusing on the entry points: `try_to_free_pages` is the direct reclaim entry, and `try_to_free_mem_cgroup_pages` is for memcg reclaim. `user_proactive_reclaim` is another, as is `shrink_all_memory`. I know `balance_pgdat` (kswapd) is a kthread, but it's non-static so it's a valid target too, even if indirectly through memory allocation. I'm listing `try_to_free_pages`, `try_to_free_mem_cgroup_pages`, `user_proactive_reclaim`, and `shrink_all_memory` as my core fuzzing targets. I need to confirm the availability of `user_proactive_reclaim`; yes, it's there in `mm/vmscan.c`. And `shrink_all_memory`, which is also in `mm/vmscan.c`, used for hibernation. I'm leaning toward prioritizing `user_proactive_reclaim` and `try_to_free_mem_cgroup_pages` as more direct reclaim entry points. I'll also keep in mind that `sys_madvise` with `MADV_PAGEOUT` or `MADV_COLD`, which lead to `madvise_pageout` and ultimately to `reclaim_pages`. That's another potential vector, so I should analyze `reclaim_pages` too to see if that should also be added.
34/2	2026/08/01 15:50	tool	grepper	0m Args: { "Expression": "reclaim_pages" } Results: { "Output": "arch/x86/kernel/cpu/sgx/main.c=257=static void sgx_reclaimer_write(struct sgx_epc_page epc_page,\n--\narch/x86/kernel/cpu/sgx/main.c-302- /\narch/x86/kernel/cpu/sgx/main.c:303:static void sgx_reclaim_pages(void)\narch/x86/kernel/cpu/sgx/main.c-304-{\n--\narch/x86/kernel/cpu/sgx/main.c=396=void sgx_reclaim_direct(void)\n--\narch/x86/kernel/cpu/sgx/main.c-398-\tif (sgx_should_reclaim(SGX_NR_LOW_PAGES))\narch/x86/kernel/cpu/sgx/main.c:399:\t\tsgx_reclaim_pages();\narch/x86/kernel/cpu/sgx/main.c-400-}\n--\narch/x86/kernel/cpu/sgx/main.c=402=static int ksgxd(void p)\n--\narch/x86/kernel/cpu/sgx/main.c-421-\t\tif (sgx_should_reclaim(SGX_NR_HIGH_PAGES))\narch/x86/kernel/cpu/sgx/main.c:422:\t\t\tsgx_reclaim_pages();\narch/x86/kernel/cpu/sgx/main.c-423-\n--\narch/x86/kernel/cpu/sgx/main.c=567=struct sgx_epc_page sgx_alloc_epc_page(void owner, bool reclaim)\n--\narch/x86/kernel/cpu/sgx/main.c-590-\narch/x86/kernel/cpu/sgx/main.c:591:\t\tsgx_reclaim_pages();\narch/x86/kernel/cpu/sgx/main.c-592-\t\tcond_resched();\n--\ndrivers/crypto/ccp/sev-dev-tio.c=387=static void sla_free(struct sla_addr_t sla, size_t len, bool firmware_state)\n--\ndrivers/crypto/ccp/sev-dev-tio.c-403-\ndrivers/crypto/ccp/sev-dev-tio.c:404:\t\t\t\tret = snp_reclaim_pages(sla_to_pa(scatter[i]), 1, false);\ndrivers/crypto/ccp/sev-dev-tio.c-405-\t\t\t\tif (ret)\n--\ndrivers/crypto/ccp/sev-dev-tio.c-408-\t\t} else {\ndrivers/crypto/ccp/sev-dev-tio.c:409:\t\t\tret = snp_reclaim_pages(sla_to_pa(sla), 1, false);\ndrivers/crypto/ccp/sev-dev-tio.c-410-\t\t}\n--\ndrivers/crypto/ccp/sev-dev.c=358=static int sev_write_init_ex_file_if_required(int cmd_id)\n--\ndrivers/crypto/ccp/sev-dev.c-383-\ndrivers/crypto/ccp/sev-dev.c:384:int snp_reclaim_pages(unsigned long paddr, unsigned int npages, bool locked)\ndrivers/crypto/ccp/sev-dev.c-385-{\n--\ndrivers/crypto/ccp/sev-dev.c-417-}\ndrivers/crypto/ccp/sev-dev.c:418:EXPORT_SYMBOL_GPL(snp_reclaim_pages);\ndrivers/crypto/ccp/sev-dev.c-419-\ndrivers/crypto/ccp/sev-dev.c=420=static int rmp_mark_pages_firmware(unsigned long paddr, unsigned int npages, bool locked)\n--\ndrivers/crypto/ccp/sev-dev.c-438-\t /\ndrivers/crypto/ccp/sev-dev.c:439:\tsnp_reclaim_pages(paddr, i, locked);\ndrivers/crypto/ccp/sev-dev.c-440-\n--\ndrivers/crypto/ccp/sev-dev.c=479=static void __snp_free_firmware_pages(struct page page, int order, bool locked)\n--\ndrivers/crypto/ccp/sev-dev.c-488-\tif (sev-\u003esnp_initialized \u0026\u0026\ndrivers/crypto/ccp/sev-dev.c:489:\t snp_reclaim_pages(paddr, npages, locked))\ndrivers/crypto/ccp/sev-dev.c-490-\t\treturn;\n--\ndrivers/crypto/ccp/sev-dev.c=712=static int snp_unmap_cmd_buf_desc(struct cmd_buf_desc desc)\n--\ndrivers/crypto/ccp/sev-dev.c-721-\t/* Transition the buffers back to hypervisor-owned. /\ndrivers/crypto/ccp/sev-dev.c:722:\tif (snp_reclaim_pages(desc-\u003epaddr_ptr, npages, true)) {\ndrivers/crypto/ccp/sev-dev.c-723-\t\tpr_warn(\"Failed to reclaim firmware-owned pages while issuing SEV legacy command.\\n\");\n--\ndrivers/crypto/ccp/sev-dev.c=833=static int snp_reclaim_cmd_buf(int cmd, void cmd_buf)\n--\ndrivers/crypto/ccp/sev-dev.c-842-\tif (sev_cmd_buf_writable(cmd))\ndrivers/crypto/ccp/sev-dev.c:843:\t\tif (snp_reclaim_pages(__pa(cmd_buf), 1, true))\ndrivers/crypto/ccp/sev-dev.c-844-\t\t\treturn -EFAULT;\n--\ndrivers/crypto/ccp/sev-dev.c=1355=static int __sev_snp_init_locked(int error, unsigned int max_snp_asid)\n--\ndrivers/crypto/ccp/sev-dev.c-1494-\t\t * This executes with the sev_cmd_mutex held so down the stack\ndrivers/crypto/ccp/sev-dev.c:1495:\t\t * snp_reclaim_pages(locked=false) might be needed (which is extremely\ndrivers/crypto/ccp/sev-dev.c-1496-\t\t * unlikely) but will cause a deadlock.\n--\ndrivers/crypto/ccp/sev-dev.c=2372=static int __sev_do_snp_platform_status(struct sev_user_data_snp_status status,\n--\ndrivers/crypto/ccp/sev-dev.c-2407-\t\t The status page will be in Reclaim state on success, or left\ndrivers/crypto/ccp/sev-dev.c:2408:\t\t * in Firmware state on failure. Use snp_reclaim_pages() to\ndrivers/crypto/ccp/sev-dev.c-2409-\t\t * transition either case back to Hypervisor-owned state.\ndrivers/crypto/ccp/sev-dev.c-2410-\t\t /\ndrivers/crypto/ccp/sev-dev.c:2411:\t\tif (snp_reclaim_pages(__pa(data), 1, true))\ndrivers/crypto/ccp/sev-dev.c-2412-\t\t\treturn -EFAULT;\n--\ndrivers/net/ethernet/mellanox/mlx5/core/debugfs.c=280=void mlx5_pages_debugfs_init(struct mlx5_core_dev dev)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/debugfs.c-290-\tdebugfs_create_u32(\"fw_pages_reclaim_discard\", 0400, pages,\ndrivers/net/ethernet/mellanox/mlx5/core/debugfs.c:291:\t\t\t \u0026dev-\u003epriv.reclaim_pages_discard);\ndrivers/net/ethernet/mellanox/mlx5/core/debugfs.c-292-}\n--\ndrivers/net/ethernet/mellanox/mlx5/core/lib/tout.c=127=static int tout_query_dtor(struct mlx5_core_dev dev)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/lib/tout.c-148-\tMLX5_TIMEOUT_FILL(fsm_reactivate_to, out, dev, MLX5_TO_FSM_REACTIVATE_MS, 0);\ndrivers/net/ethernet/mellanox/mlx5/core/lib/tout.c:149:\tMLX5_TIMEOUT_FILL(reclaim_pages_to, out, dev, MLX5_TO_RECLAIM_PAGES_MS, 0);\ndrivers/net/ethernet/mellanox/mlx5/core/lib/tout.c-150-\tMLX5_TIMEOUT_FILL(reclaim_vfs_pages_to, out, dev, MLX5_TO_RECLAIM_VFS_PAGES_MS, 0);\n--\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c=518=static u32 fwp_fill_manage_pages_out(struct fw_page fwp, u32 out, u32 index,\n--\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-535-\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c:536:static int reclaim_pages_cmd(struct mlx5_core_dev dev,\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-537-\t\t\t u32 in, int in_size, u32 out, int out_size)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-574-\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c:575:static int reclaim_pages(struct mlx5_core_dev dev, u16 func_vhca_id,\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-576-\t\t\t int npages, int nclaimed, bool event,\n--\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-606-\t\t mlx5_page_mgt_mode_is_vhca_id(dev));\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c:607:\terr = reclaim_pages_cmd(dev, in, sizeof(in), out, outlen);\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-608-\tif (err) {\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-609-\t\tnpages = MLX5_GET(manage_pages_in, in, input_num_entries);\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c:610:\t\tdev-\u003epriv.reclaim_pages_discard += npages;\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-611-\t}\n--\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c=643=static void pages_work_handler(struct work_struct work)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-651-\telse if (req-\u003enpages \u003c 0)\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c:652:\t\terr = reclaim_pages(dev, req-\u003efunc_id, -1 req-\u003enpages, NULL,\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-653-\t\t\t\t true, req-\u003eec_function);\n--\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c=830=static int mlx5_reclaim_root_pages(struct mlx5_core_dev dev,\n--\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-841-\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c:842:\t\terr = reclaim_pages(dev, func_vhca_id,\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-843-\t\t\t\t optimal_reclaimed_pages(),\n--\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-846-\t\t\tmlx5_core_warn(dev,\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c:847:\t\t\t\t \"reclaim_pages err (%d) func_vhca_id=0x%x ec_func=0x%x\\n\",\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-848-\t\t\t\t err, func_vhca_id, ec_function);\n--\ninclude/linux/mlx5/driver.h=573=struct mlx5_priv {\n--\ninclude/linux/mlx5/driver.h-587-\tu32\t\t\tgive_pages_dropped;\ninclude/linux/mlx5/driver.h:588:\tu32\t\t\treclaim_pages_discard;\ninclude/linux/mlx5/driver.h-589-\tenum mlx5_page_mgt_mode\tpage_mgt_mode;\n--\ninclude/linux/mlx5/mlx5_ifc.h=3455=struct mlx5_ifc_dtor_reg_bits {\n--\ninclude/linux/mlx5/mlx5_ifc.h-3475-\ninclude/linux/mlx5/mlx5_ifc.h:3476:\tstruct mlx5_ifc_default_timeout_bits reclaim_pages_to;\ninclude/linux/mlx5/mlx5_ifc.h-3477-\n--\ninclude/linux/psp-sev.h=1081=void snp_alloc_firmware_page(gfp_t mask);\ninclude/linux/psp-sev.h:1082:int snp_reclaim_pages(unsigned long paddr, unsigned int npages, bool locked);\ninclude/linux/psp-sev.h-1083-void snp_free_firmware_page(void addr);\n--\ninclude/linux/psp-sev.h=1115=static inline void snp_alloc_firmware_page(gfp_t mask)\n--\ninclude/linux/psp-sev.h-1119-\ninclude/linux/psp-sev.h:1120:static inline int snp_reclaim_pages(unsigned long paddr, unsigned int npages, bool locked)\ninclude/linux/psp-sev.h-1121-{\n--\ninclude/trace/events/vmscan.h=409=TRACE_EVENT(mm_vmscan_write_folio,\n--\ninclude/trace/events/vmscan.h-431-\ninclude/trace/events/vmscan.h:432:TRACE_EVENT(mm_vmscan_reclaim_pages,\ninclude/trace/events/vmscan.h-433-\n--\nmm/damon/paddr.c=220=static unsigned long damon_pa_pageout(struct damon_region r,\n--\nmm/damon/paddr.c-271-\t\tdamos_destroy_filter(filter);\nmm/damon/paddr.c:272:\tapplied = reclaim_pages(\u0026folio_list);\nmm/damon/paddr.c-273-\tcond_resched();\n--\nmm/internal.h=1205=extern unsigned long __must_check vm_mmap_pgoff(struct file , unsigned long,\n--\nmm/internal.h-1208-\nmm/internal.h:1209:unsigned long reclaim_pages(struct list_head folio_list);\nmm/internal.h-1210-unsigned int reclaim_clean_pages_from_list(struct zone zone,\n--\nmm/madvise.c=353=static int madvise_cold_or_pageout_pte_range(pmd_t pmd,\n--\nmm/madvise.c-442-\t\tif (pageout)\nmm/madvise.c:443:\t\t\treclaim_pages(\u0026folio_list);\nmm/madvise.c-444-\t\treturn 0;\n--\nmm/madvise.c-561-\tif (pageout)\nmm/madvise.c:562:\t\treclaim_pages(\u0026folio_list);\nmm/madvise.c-563-\tcond_resched();\n--\nmm/vmscan.c=2153=static unsigned int reclaim_folio_list(struct list_head folio_list,\n--\nmm/vmscan.c-2172-\t}\nmm/vmscan.c:2173:\ttrace_mm_vmscan_reclaim_pages(pgdat-\u003enode_id, sc.nr_scanned, nr_reclaimed, \u0026stat);\nmm/vmscan.c-2174-\n--\nmm/vmscan.c-2177-\nmm/vmscan.c:2178:unsigned long reclaim_pages(struct list_head *folio_list)\nmm/vmscan.c-2179-{\n" }
35/2	2026/08/01 15:50	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 39056 output: 35 thoughts: 448 Thoughts: Analyzing the Interaction of Page Reclaim and MGLRU Okay, let's break this down. My initial observation is that `reclaim_pages` isn't static and is called by `madvise_cold_or_pageout_pte_range` and `damon_pa_pageout`. However, the patch also touches functions like `scan_folios`, `isolate_folios`, `evict_folios`, and `should_run_aging`, which are all deeply involved in MGLRU. This is interesting. Now, `reclaim_pages` further calls `reclaim_folio_list`, which in turn calls `shrink_folio_list`. Ah, there's the distinction! `shrink_folio_list` is the active/inactive LRU reclaim path, which isn't MGLRU directly. MGLRU uses `evict_folios`, which internally calls `shrink_folio_list`. And, `madvise_pageout` calls `reclaim_pages`, leading back to `reclaim_folio_list`. So, `reclaim_pages` itself isn't using MGLRU directly; it's simply reclaiming the specific folios passed to it. It is MGLRU that actually makes the page replacement decisions, determining which pages to reclaim. So, the critical entry points that trigger MGLRU functionality are the functions that shrink the LRU lists, specifically `shrink_lruvec`. That’s it! That's the entry point! So those are the functions I want. I am going to use: * `try_to_free_pages` * `try_to_free_mem_cgroup_pages` * `user_proactive_reclaim` * `shrink_all_memory` Right, let's double-check about `user_proactive_reclaim`. I need to ensure it's available when `CONFIG_MEMCG` is enabled. A quick look at `mm/vmscan.c` shows it’s there, and it does indeed depend on `CONFIG_MEMCG`. Just to be safe, I’ll add `MEMCG` to `EnableConfigs` even though it's usually enabled anyway. Always better to be explicit. Okay, time to dive deeper into `mm/vmscan.c` and confirm that everything is as expected regarding `user_proactive_reclaim`.
36/2	2026/08/01 15:50	tool	read-file	0m Args: { "File": "mm/vmscan.c", "FirstLine": 8030, "LineCount": 20 } Results: { "Contents": "8030:\tstatic const match_table_t tokens = {\n8031:\t\t{ MEMORY_RECLAIM_SWAPPINESS, \"swappiness=%d\"},\n8032:\t\t{ MEMORY_RECLAIM_SWAPPINESS_MAX, \"swappiness=max\"},\n8033:\t\t{ MEMORY_RECLAIM_NULL, NULL },\n8034:\t};\n8035:\t\n8036:\tint user_proactive_reclaim(char buf,\n8037:\t\t\t\t struct mem_cgroup memcg, pg_data_t pgdat)\n8038:\t{\n8039:\t\tunsigned int nr_retries = MAX_RECLAIM_RETRIES;\n8040:\t\tunsigned long nr_to_reclaim, nr_reclaimed = 0;\n8041:\t\tint swappiness = -1;\n8042:\t\tchar old_buf, *start;\n8043:\t\tsubstring_t args[MAX_OPT_ARGS];\n8044:\t\tgfp_t gfp_mask = GFP_KERNEL;\n8045:\t\n8046:\t\tif (!buf \|\| (!memcg \u0026\u0026 !pgdat) \|\| (memcg \u0026\u0026 pgdat))\n8047:\t\t\treturn -EINVAL;\n8048:\t\n8049:\t\tbuf = strstrip(buf);\n" }
37/2	2026/08/01 15:50	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 40412 output: 21 thoughts: 106 Thoughts: Investigating the Availability of `user_proactive_reclaim` Okay, hold on a minute. It's dawning on me that `user_proactive_reclaim` might not be guarded by that `#ifdef CONFIG_MEMCG` directive. That's a crucial point, and I need to verify that assumption. So, let's explore whether `user_proactive_reclaim` is accessible even when `CONFIG_MEMCG` is disabled. Hmm, it takes a `struct mem_cgroup memcg` argument, which is the giveaway. However, if `CONFIG_MEMCG` is off, the kernel still* declares `struct mem_cgroup`, right? It might be an opaque struct or possibly an empty struct. I need to confirm how it's handled in that scenario. Alright, let's cut the chase. I need to run a quick search for `#ifdef CONFIG_MEMCG` within `mm/vmscan.c` to understand the true dependencies of that function. That'll clear up any potential confusion and give me a concrete answer.
38/2	2026/08/01 15:50	tool	grepper	0m Args: { "Expression": "^#ifdef CONFIG_MEMCG" } Results: { "Output": "\nFull output is too long, showing 500 out of 744 lines.\nUse more precise expression if possible.\n\nblock/blk-cgroup.c=1508=struct cgroup_subsys io_cgrp_subsys = {\n--\nblock/blk-cgroup.c-1517-\t.exit = blkcg_exit,\nblock/blk-cgroup.c:1518:#ifdef CONFIG_MEMCG\nblock/blk-cgroup.c-1519-\t/\n--\ndrivers/block/loop.c=1843=static blk_status_t loop_queue_rq(struct blk_mq_hw_ctx hctx,\n--\ndrivers/block/loop.c-1871-\t\tcmd-\u003eblkcg_css = bio_blkcg_css(rq-\u003ebio);\ndrivers/block/loop.c:1872:#ifdef CONFIG_MEMCG\ndrivers/block/loop.c-1873-\t\tif (cmd-\u003eblkcg_css) {\n--\ndrivers/iommu/iommu-pages.c=19=IOPTDESC_MATCH(_refcount, __page_refcount);\ndrivers/iommu/iommu-pages.c:20:#ifdef CONFIG_MEMCG\ndrivers/iommu/iommu-pages.c-21-IOPTDESC_MATCH(memcg_data, memcg_data);\n--\ndrivers/iommu/iommu-pages.h=19=struct ioptdesc {\n--\ndrivers/iommu/iommu-pages.h-31-\tatomic_t __page_refcount;\ndrivers/iommu/iommu-pages.h:32:#ifdef CONFIG_MEMCG\ndrivers/iommu/iommu-pages.h-33-\tunsigned long memcg_data;\n--\nfs/proc/page.c=261=static const struct proc_ops kpageflags_proc_ops = {\n--\nfs/proc/page.c-266-\nfs/proc/page.c:267:#ifdef CONFIG_MEMCG\nfs/proc/page.c-268-static ssize_t kpagecgroup_read(struct file file, char __user buf,\n--\nfs/proc/page.c=280=static int __init proc_page_init(void)\n--\nfs/proc/page.c-283-\tproc_create(\"kpageflags\", S_IRUSR, NULL, \u0026kpageflags_proc_ops);\nfs/proc/page.c:284:#ifdef CONFIG_MEMCG\nfs/proc/page.c-285-\tproc_create(\"kpagecgroup\", S_IRUSR, NULL, \u0026kpagecgroup_proc_ops);\n--\ninclude/linux/bpf.h=300=struct bpf_map {\n--\ninclude/linux/bpf.h-320-\tstruct btf btf;\ninclude/linux/bpf.h:321:#ifdef CONFIG_MEMCG\ninclude/linux/bpf.h-322-\tstruct obj_cgroup objcg;\n--\ninclude/linux/bpf.h=2780=int bpf_map_alloc_pages(const struct bpf_map map, int nid,\ninclude/linux/bpf.h-2781-\t\t\tunsigned long nr_pages, struct page page_array);\ninclude/linux/bpf.h:2782:#ifdef CONFIG_MEMCG\ninclude/linux/bpf.h-2783-void bpf_map_memcg_enter(const struct bpf_map map, struct mem_cgroup *old_memcg,\n--\ninclude/linux/list_lru.h=51=struct list_lru {\ninclude/linux/list_lru.h-52-\tstruct list_lru_node\tnode;\ninclude/linux/list_lru.h:53:#ifdef CONFIG_MEMCG\ninclude/linux/list_lru.h-54-\tstruct list_head\tlist;\n--\ninclude/linux/list_lru.h=82=int memcg_list_lru_alloc(struct mem_cgroup memcg, struct list_lru lru,\n--\ninclude/linux/list_lru.h-84-\ninclude/linux/list_lru.h:85:#ifdef CONFIG_MEMCG\ninclude/linux/list_lru.h-86-/*\n--\ninclude/linux/memcontrol.h=60=struct mem_cgroup_reclaim_cookie {\n--\ninclude/linux/memcontrol.h-64-\ninclude/linux/memcontrol.h:65:#ifdef CONFIG_MEMCG\ninclude/linux/memcontrol.h-66-\n--\ninclude/linux/memcontrol.h=89=struct mem_cgroup_per_node {\n--\ninclude/linux/memcontrol.h-97-\ninclude/linux/memcontrol.h:98:#ifdef CONFIG_MEMCG_V1\ninclude/linux/memcontrol.h-99-\t/\n--\ninclude/linux/memcontrol.h-128-\ninclude/linux/memcontrol.h:129:#ifdef CONFIG_MEMCG_NMI_SAFETY_REQUIRES_ATOMIC\ninclude/linux/memcontrol.h-130-\t/* slab stats for nmi context /\n--\ninclude/linux/memcontrol.h=202=struct mem_cgroup {\n--\ninclude/linux/memcontrol.h-255-\ninclude/linux/memcontrol.h:256:#ifdef CONFIG_MEMCG_NMI_SAFETY_REQUIRES_ATOMIC\ninclude/linux/memcontrol.h-257-\t/ MEMCG_KMEM for nmi context /\n--\ninclude/linux/memcontrol.h-283-\ninclude/linux/memcontrol.h:284:#ifdef CONFIG_MEMCG_V1\ninclude/linux/memcontrol.h-285-\t/ Legacy consumer-oriented counters /\n--\ninclude/linux/memcontrol.h=354=enum objext_flags {\n--\ninclude/linux/memcontrol.h-367-\ninclude/linux/memcontrol.h:368:#ifdef CONFIG_MEMCG\ninclude/linux/memcontrol.h-369-/\n--\ninclude/linux/memcontrol.h=1476=struct slabobj_ext {\ninclude/linux/memcontrol.h:1477:#ifdef CONFIG_MEMCG\ninclude/linux/memcontrol.h-1478-\tstruct obj_cgroup objcg;\n--\ninclude/linux/memcontrol.h=1504=static inline struct lruvec lruvec_live_lock_irq(struct lruvec lruvec)\ninclude/linux/memcontrol.h-1505-{\ninclude/linux/memcontrol.h:1506:#ifdef CONFIG_MEMCG\ninclude/linux/memcontrol.h-1507-\tstruct pglist_data pgdat = lruvec_pgdat(lruvec);\n--\ninclude/linux/memcontrol.h=1639=struct sock;\ninclude/linux/memcontrol.h:1640:#ifdef CONFIG_MEMCG\ninclude/linux/memcontrol.h-1641-extern struct static_key_false memcg_sockets_enabled_key;\n--\ninclude/linux/memcontrol.h=1727=static inline int shrinker_id(struct shrinker shrinker)\n--\ninclude/linux/memcontrol.h-1732-\ninclude/linux/memcontrol.h:1733:#ifdef CONFIG_MEMCG\ninclude/linux/memcontrol.h-1734-bool mem_cgroup_kmem_disabled(void);\n--\ninclude/linux/memcontrol.h=1919=static inline bool mem_cgroup_zswap_writeback_enabled(struct mem_cgroup memcg)\n--\ninclude/linux/memcontrol.h-1928-\ninclude/linux/memcontrol.h:1929:#ifdef CONFIG_MEMCG_V1\ninclude/linux/memcontrol.h-1930-unsigned long memcg1_soft_limit_reclaim(pg_data_t pgdat, int order,\n--\ninclude/linux/mm_inline.h=47=static __always_inline void update_lru_size(struct lruvec lruvec,\n--\ninclude/linux/mm_inline.h-51-\t__update_lru_size(lruvec, lru, zid, nr_pages);\ninclude/linux/mm_inline.h:52:#ifdef CONFIG_MEMCG\ninclude/linux/mm_inline.h-53-\tmem_cgroup_update_lru_size(lruvec, lru, zid, nr_pages);\n--\ninclude/linux/mm_types.h=80=struct page {\n--\ninclude/linux/mm_types.h-186-\ninclude/linux/mm_types.h:187:#ifdef CONFIG_MEMCG\ninclude/linux/mm_types.h-188-\tunsigned long memcg_data;\n--\ninclude/linux/mm_types.h=404=struct folio {\n--\ninclude/linux/mm_types.h-435-\t\t\tatomic_t _refcount;\ninclude/linux/mm_types.h:436:#ifdef CONFIG_MEMCG\ninclude/linux/mm_types.h-437-\t\t\tunsigned long memcg_data;\n--\ninclude/linux/mm_types.h=521=FOLIO_MATCH(_refcount, _refcount);\ninclude/linux/mm_types.h:522:#ifdef CONFIG_MEMCG\ninclude/linux/mm_types.h-523-FOLIO_MATCH(memcg_data, memcg_data);\n--\ninclude/linux/mm_types.h=576=struct ptdesc {\n--\ninclude/linux/mm_types.h-607-\tatomic_t __page_refcount;\ninclude/linux/mm_types.h:608:#ifdef CONFIG_MEMCG\ninclude/linux/mm_types.h-609-\tunsigned long pt_memcg_data;\n--\ninclude/linux/mm_types.h=622=TABLE_MATCH(_refcount, __page_refcount);\ninclude/linux/mm_types.h:623:#ifdef CONFIG_MEMCG\ninclude/linux/mm_types.h-624-TABLE_MATCH(memcg_data, pt_memcg_data);\n--\ninclude/linux/mm_types.h=1175=struct mm_struct {\n--\ninclude/linux/mm_types.h-1327-#endif\ninclude/linux/mm_types.h:1328:#ifdef CONFIG_MEMCG\ninclude/linux/mm_types.h-1329-\t\t/\n--\ninclude/linux/mm_types.h-1412-\t\t\tunsigned long bitmap;\ninclude/linux/mm_types.h:1413:#ifdef CONFIG_MEMCG\ninclude/linux/mm_types.h-1414-\t\t\t/ points to the memcg of \"owner\" above /\n--\ninclude/linux/mm_types.h=1502=static inline void lru_gen_init_mm(struct mm_struct mm)\n--\ninclude/linux/mm_types.h-1505-\tmm-\u003elru_gen.bitmap = 0;\ninclude/linux/mm_types.h:1506:#ifdef CONFIG_MEMCG\ninclude/linux/mm_types.h-1507-\tmm-\u003elru_gen.memcg = NULL;\n--\ninclude/linux/mmzone.h=764=struct lruvec {\n--\ninclude/linux/mmzone.h-791-#endif /* CONFIG_LRU_GEN /\ninclude/linux/mmzone.h:792:#ifdef CONFIG_MEMCG\ninclude/linux/mmzone.h-793-\tstruct pglist_data pgdat;\n--\ninclude/linux/mmzone.h=1664=static inline struct pglist_data lruvec_pgdat(struct lruvec lruvec)\ninclude/linux/mmzone.h-1665-{\ninclude/linux/mmzone.h:1666:#ifdef CONFIG_MEMCG\ninclude/linux/mmzone.h-1667-\treturn lruvec-\u003epgdat;\n--\ninclude/linux/sched.h=826=struct task_struct {\n--\ninclude/linux/sched.h-1021-#endif\ninclude/linux/sched.h:1022:#ifdef CONFIG_MEMCG_V1\ninclude/linux/sched.h-1023-\tunsigned\t\t\tin_user_fault:1;\n--\ninclude/linux/sched.h-1548-\ninclude/linux/sched.h:1549:#ifdef CONFIG_MEMCG_V1\ninclude/linux/sched.h-1550-\tstruct mem_cgroup\t\tmemcg_in_oom;\n--\ninclude/linux/sched.h-1552-\ninclude/linux/sched.h:1553:#ifdef CONFIG_MEMCG\ninclude/linux/sched.h-1554-\t/ Number of pages to reclaim on returning to userland: /\n--\ninclude/linux/sched/mm.h=161=extern void exec_mm_release(struct task_struct , struct mm_struct );\ninclude/linux/sched/mm.h-162-\ninclude/linux/sched/mm.h:163:#ifdef CONFIG_MEMCG\ninclude/linux/sched/mm.h-164-extern void mm_update_next_owner(struct mm_struct mm);\n--\ninclude/linux/sched/mm.h=466=static inline void memalloc_pin_restore(unsigned int flags)\n--\ninclude/linux/sched/mm.h-470-\ninclude/linux/sched/mm.h:471:#ifdef CONFIG_MEMCG\ninclude/linux/sched/mm.h-472-DECLARE_PER_CPU(struct mem_cgroup , int_active_memcg);\n--\ninclude/linux/shrinker.h=82=struct shrinker {\n--\ninclude/linux/shrinker.h-106-\tstruct list_head list;\ninclude/linux/shrinker.h:107:#ifdef CONFIG_MEMCG\ninclude/linux/shrinker.h-108-\t/ ID in shrinker_idr /\n--\ninclude/linux/slab.h=26=enum _slab_flag_bits {\n--\ninclude/linux/slab.h-45-#endif\ninclude/linux/slab.h:46:#ifdef CONFIG_MEMCG\ninclude/linux/slab.h-47-\t_SLAB_ACCOUNT,\n--\ninclude/linux/slab.h-204- /\ninclude/linux/slab.h:205:#ifdef CONFIG_MEMCG\ninclude/linux/slab.h-206-# define SLAB_ACCOUNT\t\t__SLAB_FLAG_BIT(_SLAB_ACCOUNT)\n--\ninclude/linux/slab.h=708=enum kmalloc_cache_type {\n--\ninclude/linux/slab.h-728-#endif\ninclude/linux/slab.h:729:#ifdef CONFIG_MEMCG\ninclude/linux/slab.h-730-\tKMALLOC_CGROUP,\n--\ninclude/linux/swap.h=467=static inline int add_swap_extent(struct swap_info_struct sis,\n--\ninclude/linux/swap.h-473-#endif / CONFIG_SWAP /\ninclude/linux/swap.h:474:#ifdef CONFIG_MEMCG\ninclude/linux/swap.h-475-void lru_reparent_memcg(struct mem_cgroup memcg, struct mem_cgroup parent, int nid);\n--\ninclude/linux/vmpressure.h=13=struct vmpressure {\n--\ninclude/linux/vmpressure.h-18-\ninclude/linux/vmpressure.h:19:#ifdef CONFIG_MEMCG_V1\ninclude/linux/vmpressure.h-20-\t/\n--\ninclude/linux/vmpressure.h=43=struct mem_cgroup;\ninclude/linux/vmpressure.h-44-\ninclude/linux/vmpressure.h:45:#ifdef CONFIG_MEMCG\ninclude/linux/vmpressure.h-46-void vmpressure(gfp_t gfp, int order, struct mem_cgroup memcg, bool tree,\n--\ninclude/linux/vmpressure.h=55=extern enum vmpressure_levels vmpressure_calc_level(unsigned long scanned,\n--\ninclude/linux/vmpressure.h-57-\ninclude/linux/vmpressure.h:58:#ifdef CONFIG_MEMCG_V1\ninclude/linux/vmpressure.h-59-extern void vmpressure_prio(gfp_t gfp, struct mem_cgroup memcg, int prio);\n--\ninclude/linux/vmstat.h=522=static inline const char vm_event_name(enum vm_event_item item)\n--\ninclude/linux/vmstat.h-531-\ninclude/linux/vmstat.h:532:#ifdef CONFIG_MEMCG\ninclude/linux/vmstat.h-533-\n--\ninclude/net/sock.h=365=struct sock {\n--\ninclude/net/sock.h-460-\tstruct socket\t\tsk_socket;\ninclude/net/sock.h:461:#ifdef CONFIG_MEMCG\ninclude/net/sock.h-462-\tstruct mem_cgroup\tsk_memcg;\n--\ninclude/net/sock.h=2686=static inline gfp_t gfp_memcg_charge(void)\n--\ninclude/net/sock.h-2690-\ninclude/net/sock.h:2691:#ifdef CONFIG_MEMCG\ninclude/net/sock.h-2692-static inline struct mem_cgroup mem_cgroup_from_sk(const struct sock sk)\n--\ninclude/net/sock.h=2702=static inline bool mem_cgroup_sk_under_memory_pressure(const struct sock sk)\n--\ninclude/net/sock.h-2705-\ninclude/net/sock.h:2706:#ifdef CONFIG_MEMCG_V1\ninclude/net/sock.h-2707-\tif (!cgroup_subsys_on_dfl(memory_cgrp_subsys))\n--\ninclude/trace/events/vmscan.h=203=DEFINE_EVENT(mm_vmscan_direct_reclaim_begin_template, mm_vmscan_direct_reclaim_begin,\n--\ninclude/trace/events/vmscan.h-209-\ninclude/trace/events/vmscan.h:210:#ifdef CONFIG_MEMCG\ninclude/trace/events/vmscan.h-211-DEFINE_EVENT(mm_vmscan_direct_reclaim_begin_template, mm_vmscan_memcg_reclaim_begin,\n--\ninclude/trace/events/vmscan.h=249=DEFINE_EVENT(mm_vmscan_direct_reclaim_end_template, mm_vmscan_direct_reclaim_end,\n--\ninclude/trace/events/vmscan.h-255-\ninclude/trace/events/vmscan.h:256:#ifdef CONFIG_MEMCG\ninclude/trace/events/vmscan.h-257-DEFINE_EVENT(mm_vmscan_direct_reclaim_end_template, mm_vmscan_memcg_reclaim_end,\n--\nkernel/bpf/memalloc.c=160=static struct mem_cgroup get_memcg(const struct bpf_mem_cache c)\nkernel/bpf/memalloc.c-161-{\nkernel/bpf/memalloc.c:162:#ifdef CONFIG_MEMCG\nkernel/bpf/memalloc.c-163-\tif (c-\u003eobjcg)\n--\nkernel/bpf/memalloc.c=502=int bpf_mem_alloc_init(struct bpf_mem_alloc ma, int size, bool percpu)\n--\nkernel/bpf/memalloc.c-525-\nkernel/bpf/memalloc.c:526:#ifdef CONFIG_MEMCG\nkernel/bpf/memalloc.c-527-\t\tif (memcg_bpf_enabled())\n--\nkernel/bpf/memalloc.c-547-\t\treturn -ENOMEM;\nkernel/bpf/memalloc.c:548:#ifdef CONFIG_MEMCG\nkernel/bpf/memalloc.c-549-\tobjcg = get_obj_cgroup_from_current();\n--\nkernel/bpf/syscall.c=466=void bpf_map_free_id(struct bpf_map map)\n--\nkernel/bpf/syscall.c-485-\nkernel/bpf/syscall.c:486:#ifdef CONFIG_MEMCG\nkernel/bpf/syscall.c-487-static void bpf_map_save_memcg(struct bpf_map map)\n--\nkernel/bpf/verifier.c=5637=BTF_TYPE_SAFE_RCU_OR_NULL(struct mm_struct) {\nkernel/bpf/verifier.c-5638-\tstruct file __rcu exe_file;\nkernel/bpf/verifier.c:5639:#ifdef CONFIG_MEMCG\nkernel/bpf/verifier.c-5640-\tstruct task_struct __rcu owner;\n--\nkernel/exit.c=429=static void coredump_task_exit(struct task_struct tsk,\n--\nkernel/exit.c-454-\nkernel/exit.c:455:#ifdef CONFIG_MEMCG\nkernel/exit.c-456-/* drops tasklist_lock if succeeds /\n--\nkernel/fork.c=914=static struct task_struct dup_task_struct(struct task_struct orig, int node)\n--\nkernel/fork.c-998-\nkernel/fork.c:999:#ifdef CONFIG_MEMCG\nkernel/fork.c-1000-\ttsk-\u003eactive_memcg = NULL;\n--\nkernel/fork.c=1052=static __always_inline void mm_clear_owner(struct mm_struct mm,\n--\nkernel/fork.c-1054-{\nkernel/fork.c:1055:#ifdef CONFIG_MEMCG\nkernel/fork.c-1056-\tif (mm-\u003eowner == p)\n--\nkernel/fork.c=1061=static void mm_init_owner(struct mm_struct mm, struct task_struct p)\nkernel/fork.c-1062-{\nkernel/fork.c:1063:#ifdef CONFIG_MEMCG\nkernel/fork.c-1064-\tmm-\u003eowner = p;\n--\nmm/damon/sysfs-common.c=106=static bool damon_sysfs_memcg_path_eq(struct mem_cgroup memcg,\n--\nmm/damon/sysfs-common.c-108-{\nmm/damon/sysfs-common.c:109:#ifdef CONFIG_MEMCG\nmm/damon/sysfs-common.c-110-\tcgroup_path(memcg-\u003ecss.cgroup, memcg_path_buf, PATH_MAX);\n--\nmm/debug.c=70=static void __dump_folio(const struct folio folio, const struct page page,\n--\nmm/debug.c-96-\nmm/debug.c:97:#ifdef CONFIG_MEMCG\nmm/debug.c-98-\tif (folio-\u003ememcg_data)\n--\nmm/debug.c=175=void dump_mm(const struct mm_struct mm)\n--\nmm/debug.c-188-#endif\nmm/debug.c:189:#ifdef CONFIG_MEMCG\nmm/debug.c-190-\t\t\"owner %px \"\n--\nmm/debug.c-217-#endif\nmm/debug.c:218:#ifdef CONFIG_MEMCG\nmm/debug.c-219-\t\tmm-\u003eowner,\n--\nmm/folio.c=1061=void folio_batch_remove_exceptionals(struct folio_batch fbatch)\n--\nmm/folio.c-1072-\nmm/folio.c:1073:#ifdef CONFIG_MEMCG\nmm/folio.c-1074-static void lruvec_reparent_lru(struct lruvec child_lruvec,\n--\nmm/huge_memory.c=3642=static void __split_folio_to_order(struct folio folio, int old_order,\n--\nmm/huge_memory.c-3744-\t\t\tfolio_set_idle(new_folio);\nmm/huge_memory.c:3745:#ifdef CONFIG_MEMCG\nmm/huge_memory.c-3746-\t\tnew_folio-\u003ememcg_data = folio-\u003ememcg_data;\n--\nmm/hwpoison-inject.c=45=static int hwpoison_filter_flags(struct page p)\n--\nmm/hwpoison-inject.c-66- /\nmm/hwpoison-inject.c:67:#ifdef CONFIG_MEMCG\nmm/hwpoison-inject.c-68-static u64 hwpoison_filter_memcg;\n--\nmm/hwpoison-inject.c=162=static int __init pfn_inject_init(void)\n--\nmm/hwpoison-inject.c-191-\nmm/hwpoison-inject.c:192:#ifdef CONFIG_MEMCG\nmm/hwpoison-inject.c-193-\tdebugfs_create_u64(\"corrupt-filter-memcg\", 0600, hwpoison_dir,\n--\nmm/kfence/core.c=611=static unsigned long kfence_init_pool(void)\n--\nmm/kfence/core.c-638-\t\t__SetPageSlab(page);\nmm/kfence/core.c:639:#ifdef CONFIG_MEMCG\nmm/kfence/core.c-640-\t\tstruct slab slab = page_slab(page);\n--\nmm/kfence/core.c-706-\t\tpage = pfn_to_page(start_pfn + i);\nmm/kfence/core.c:707:#ifdef CONFIG_MEMCG\nmm/kfence/core.c-708-\t\tstruct slab slab = page_slab(page);\n--\nmm/kfence/core.c=1247=void __kfence_free(void addr)\n--\nmm/kfence/core.c-1250-\nmm/kfence/core.c:1251:#ifdef CONFIG_MEMCG\nmm/kfence/core.c-1252-\tKFENCE_WARN_ON(meta-\u003eobj_exts.objcg);\n--\nmm/kfence/kfence.h=59=struct kfence_metadata {\n--\nmm/kfence/kfence.h-104-\tu32 alloc_stack_hash __guarded_by(\u0026lock);\nmm/kfence/kfence.h:105:#ifdef CONFIG_MEMCG\nmm/kfence/kfence.h-106-\tstruct slabobj_ext obj_exts;\n--\nmm/list_lru.c=29=static inline void unlock_list_lru(struct list_lru_one l, bool irq_off,\n--\nmm/list_lru.c-39-\nmm/list_lru.c:40:#ifdef CONFIG_MEMCG\nmm/list_lru.c-41-static LIST_HEAD(memcg_list_lrus);\n--\nmm/list_lru.c=413=unsigned long list_lru_walk_node(struct list_lru lru, int nid,\n--\nmm/list_lru.c-421-\nmm/list_lru.c:422:#ifdef CONFIG_MEMCG\nmm/list_lru.c-423-\tif (nr_to_walk \u003e 0 \u0026\u0026 list_lru_memcg_aware(lru)) {\n--\nmm/list_lru.c=451=static void init_one_lru(struct list_lru lru, struct list_lru_one l)\n--\nmm/list_lru.c-461-\nmm/list_lru.c:462:#ifdef CONFIG_MEMCG\nmm/list_lru.c-463-static struct list_lru_memcg memcg_init_list_lru_one(struct list_lru lru, gfp_t gfp)\n--\nmm/list_lru.c=664=int __list_lru_init(struct list_lru lru, bool memcg_aware, struct shrinker shrinker)\n--\nmm/list_lru.c-667-\nmm/list_lru.c:668:#ifdef CONFIG_MEMCG\nmm/list_lru.c-669-\tif (shrinker)\n--\nmm/list_lru.c=692=void list_lru_destroy(struct list_lru lru)\n--\nmm/list_lru.c-703-\nmm/list_lru.c:704:#ifdef CONFIG_MEMCG\nmm/list_lru.c-705-\tlru-\u003eshrinker_id = -1;\n--\nmm/memcontrol-v1.h=24=struct mem_cgroup mem_cgroup_private_id_get_online(struct mem_cgroup memcg,\n--\nmm/memcontrol-v1.h-27-/* Cgroup v1-specific declarations /\nmm/memcontrol-v1.h:28:#ifdef CONFIG_MEMCG_V1\nmm/memcontrol-v1.h-29-\n--\nmm/memcontrol.c=215=static inline struct obj_cgroup __memcg_reparent_objcgs(struct mem_cgroup memcg,\n--\nmm/memcontrol.c-234-\nmm/memcontrol.c:235:#ifdef CONFIG_MEMCG_V1\nmm/memcontrol.c-236-static void __mem_cgroup_flush_stats(struct mem_cgroup memcg, bool force);\n--\nmm/memcontrol.c=550=unsigned long lruvec_page_state_local(struct lruvec lruvec,\n--\nmm/memcontrol.c-572-\nmm/memcontrol.c:573:#ifdef CONFIG_MEMCG_V1\nmm/memcontrol.c-574-static void __mod_memcg_lruvec_state(struct mem_cgroup_per_node pn,\n--\nmm/memcontrol.c=598=static const unsigned int memcg_vm_event_stat[] = {\nmm/memcontrol.c:599:#ifdef CONFIG_MEMCG_V1\nmm/memcontrol.c-600-\tPGPGIN,\n--\nmm/memcontrol.c=832=static long memcg_state_val_in_pages(int idx, long val)\n--\nmm/memcontrol.c-847-\nmm/memcontrol.c:848:#ifdef CONFIG_MEMCG_V1\nmm/memcontrol.c-849-/\n--\nmm/memcontrol.c=916=void mod_memcg_state(struct mem_cgroup memcg, enum memcg_stat_item idx,\n--\nmm/memcontrol.c-928-\nmm/memcontrol.c:929:#ifdef CONFIG_MEMCG_V1\nmm/memcontrol.c-930-/* idx can be of type enum memcg_stat_item or node_stat_item. /\n--\nmm/memcontrol.c=1104=bool memcg_vm_event_item_valid(enum vm_event_item idx)\n--\nmm/memcontrol.c-1111-\nmm/memcontrol.c:1112:#ifdef CONFIG_MEMCG_V1\nmm/memcontrol.c-1113-unsigned long memcg_events_local(struct mem_cgroup memcg, int event)\n--\nmm/memcontrol.c=1712=unsigned long memcg_page_state_output(struct mem_cgroup memcg, int item)\n--\nmm/memcontrol.c-1717-\nmm/memcontrol.c:1718:#ifdef CONFIG_MEMCG_V1\nmm/memcontrol.c-1719-unsigned long memcg_page_state_local_output(struct mem_cgroup memcg, int item)\n--\nmm/memcontrol.c=1738=static void memcg_stat_format(struct mem_cgroup memcg, struct seq_buf s)\n--\nmm/memcontrol.c-1784-\tfor (i = 0; i \u003c ARRAY_SIZE(memcg_vm_event_stat); i++) {\nmm/memcontrol.c:1785:#ifdef CONFIG_MEMCG_V1\nmm/memcontrol.c-1786-\t\tif (memcg_vm_event_stat[i] == PGPGIN \|\|\n--\nmm/memcontrol.c=1836=void mem_cgroup_print_oom_meminfo(struct mem_cgroup memcg)\n--\nmm/memcontrol.c-1857-\t\t\tatomic_long_read(\u0026memcg-\u003ememory_events[MEMCG_SWAP_MAX]));\nmm/memcontrol.c:1858:#ifdef CONFIG_MEMCG_V1\nmm/memcontrol.c-1859-\telse {\n--\nmm/memcontrol.c=2858=static void commit_charge(struct folio folio, struct obj_cgroup objcg)\n--\nmm/memcontrol.c-2870-\nmm/memcontrol.c:2871:#ifdef CONFIG_MEMCG_NMI_SAFETY_REQUIRES_ATOMIC\nmm/memcontrol.c-2872-static inline void account_slab_nmi_safe(struct mem_cgroup memcg,\n--\nmm/memcontrol.c=3090=struct obj_cgroup get_obj_cgroup_from_folio(struct folio folio)\n--\nmm/memcontrol.c-3100-\nmm/memcontrol.c:3101:#ifdef CONFIG_MEMCG_NMI_SAFETY_REQUIRES_ATOMIC\nmm/memcontrol.c-3102-static inline void account_kmem_nmi_safe(struct mem_cgroup memcg, int val)\n--\nmm/memcontrol.c=4212=mem_cgroup_css_alloc(struct cgroup_subsys_state parent_css)\n--\nmm/memcontrol.c-4233-\t\tpage_counter_init(\u0026memcg-\u003eswap, \u0026parent-\u003eswap, false);\nmm/memcontrol.c:4234:#ifdef CONFIG_MEMCG_V1\nmm/memcontrol.c-4235-\t\tWRITE_ONCE(memcg-\u003eswappiness, mem_cgroup_swappiness(parent));\n\n" }
39/2	2026/08/01 15:50	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 49464 output: 35 thoughts: 56 Thoughts: Here's my take on the thought process: Diving Deep into `vmscan.c` Okay, hold on a minute. I was just reviewing the memory management code, and I need to double-check something. I thought I remembered seeing `user_proactive_reclaim` defined in `mm/vmscan.c`, but without any conditional compilation based on the `CONFIG_MEMCG` setting. That seems... odd. I was sure that related features were guarded by that configuration flag. Let me quickly jump back into `mm/vmscan.c` and take another look around line 8036. I want to make absolutely certain I didn't misinterpret that. It's crucial to understand those interactions between the reclaim mechanisms and memory control groups, and any unexpected behavior without the `CONFIG_MEMCG` guard could indicate a problem or an oversight in the code.
40/2	2026/08/01 15:50	tool	read-file	0m Args: { "File": "mm/vmscan.c", "FirstLine": 8020, "LineCount": 50 } Results: { "Contents": "8020:\t\treturn 0;\n8021:\t}\n8022:\t\n8023:\t#endif\n8024:\t\n8025:\tenum {\n8026:\t\tMEMORY_RECLAIM_SWAPPINESS = 0,\n8027:\t\tMEMORY_RECLAIM_SWAPPINESS_MAX,\n8028:\t\tMEMORY_RECLAIM_NULL,\n8029:\t};\n8030:\tstatic const match_table_t tokens = {\n8031:\t\t{ MEMORY_RECLAIM_SWAPPINESS, \"swappiness=%d\"},\n8032:\t\t{ MEMORY_RECLAIM_SWAPPINESS_MAX, \"swappiness=max\"},\n8033:\t\t{ MEMORY_RECLAIM_NULL, NULL },\n8034:\t};\n8035:\t\n8036:\tint user_proactive_reclaim(char buf,\n8037:\t\t\t\t struct mem_cgroup memcg, pg_data_t pgdat)\n8038:\t{\n8039:\t\tunsigned int nr_retries = MAX_RECLAIM_RETRIES;\n8040:\t\tunsigned long nr_to_reclaim, nr_reclaimed = 0;\n8041:\t\tint swappiness = -1;\n8042:\t\tchar old_buf, *start;\n8043:\t\tsubstring_t args[MAX_OPT_ARGS];\n8044:\t\tgfp_t gfp_mask = GFP_KERNEL;\n8045:\t\n8046:\t\tif (!buf \|\| (!memcg \u0026\u0026 !pgdat) \|\| (memcg \u0026\u0026 pgdat))\n8047:\t\t\treturn -EINVAL;\n8048:\t\n8049:\t\tbuf = strstrip(buf);\n8050:\t\n8051:\t\told_buf = buf;\n8052:\t\tnr_to_reclaim = memparse(buf, \u0026buf) / PAGE_SIZE;\n8053:\t\tif (buf == old_buf)\n8054:\t\t\treturn -EINVAL;\n8055:\t\n8056:\t\tbuf = strstrip(buf);\n8057:\t\n8058:\t\twhile ((start = strsep(\u0026buf, \" \")) != NULL) {\n8059:\t\t\tif (!strlen(start))\n8060:\t\t\t\tcontinue;\n8061:\t\t\tswitch (match_token(start, tokens, args)) {\n8062:\t\t\tcase MEMORY_RECLAIM_SWAPPINESS:\n8063:\t\t\t\tif (match_int(\u0026args[0], \u0026swappiness))\n8064:\t\t\t\t\treturn -EINVAL;\n8065:\t\t\t\tif (swappiness \u003c MIN_SWAPPINESS \|\|\n8066:\t\t\t\t swappiness \u003e MAX_SWAPPINESS)\n8067:\t\t\t\t\treturn -EINVAL;\n8068:\t\t\t\tbreak;\n8069:\t\t\tcase MEMORY_RECLAIM_SWAPPINESS_MAX:\n" }
41/2	2026/08/01 15:50	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 50501 output: 35 thoughts: 62 Thoughts: Checking Memory Cgroup Freeing Function Okay, so I've confirmed the function in question is available. Now, I need to understand its context within the kernel. Let's see... the name `try_to_free_mem_cgroup_pages` definitely suggests memory cgroup interaction. My immediate thought is to check its definition and see if it's tied to the `CONFIG_MEMCG` configuration option. Knowing where it's defined will help me understand its scope. Let's start by finding it; the code path is `mm/vmscan.c`, likely around line 6933, as I recall. Now, let's see if this function is only compiled if memory cgroups are enabled, which I suspect it is.
42/2	2026/08/01 15:50	tool	read-file	0m Args: { "File": "mm/vmscan.c", "FirstLine": 6920, "LineCount": 40 } Results: { "Contents": "6920:\t\t * if we don't reclaim here, the shrink_node from balance_pgdat\n6921:\t\t * will pick up pages from other mem cgroup's as well. We hack\n6922:\t\t * the priority and make it zero.\n6923:\t\t /\n6924:\t\tshrink_lruvec(lruvec, \u0026sc);\n6925:\t\n6926:\t\ttrace_mm_vmscan_memcg_softlimit_reclaim_end(sc.nr_reclaimed, memcg);\n6927:\t\n6928:\t\tnr_scanned = sc.nr_scanned;\n6929:\t\n6930:\t\treturn sc.nr_reclaimed;\n6931:\t}\n6932:\t\n6933:\tunsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup memcg,\n6934:\t\t\t\t\t\t unsigned long nr_pages,\n6935:\t\t\t\t\t\t gfp_t gfp_mask,\n6936:\t\t\t\t\t\t unsigned int reclaim_options,\n6937:\t\t\t\t\t\t int swappiness)\n6938:\t{\n6939:\t\tunsigned long nr_reclaimed;\n6940:\t\tunsigned int noreclaim_flag;\n6941:\t\tstruct scan_control sc = {\n6942:\t\t\t.nr_to_reclaim = max(nr_pages, SWAP_CLUSTER_MAX),\n6943:\t\t\t.proactive_swappiness = swappiness,\n6944:\t\t\t.gfp_mask = (current_gfp_context(gfp_mask) \u0026 GFP_RECLAIM_MASK) \|\n6945:\t\t\t\t\t(GFP_HIGHUSER_MOVABLE \u0026 ~GFP_RECLAIM_MASK),\n6946:\t\t\t.reclaim_idx = MAX_NR_ZONES - 1,\n6947:\t\t\t.target_mem_cgroup = memcg,\n6948:\t\t\t.priority = DEF_PRIORITY,\n6949:\t\t\t.may_writepage = 1,\n6950:\t\t\t.may_unmap = 1,\n6951:\t\t\t.may_swap = !!(reclaim_options \u0026 MEMCG_RECLAIM_MAY_SWAP),\n6952:\t\t\t.proactive = !!(reclaim_options \u0026 MEMCG_RECLAIM_PROACTIVE),\n6953:\t\t};\n6954:\t\t/\n6955:\t\t Traverse the ZONELIST_FALLBACK zonelist of the current node to put\n6956:\t\t * equal pressure on all the nodes. This is based on the assumption that\n6957:\t\t * the reclaim does not bail out early.\n6958:\t\t /\n6959:\t\tstruct zonelist zonelist = node_zonelist(numa_node_id(), sc.gfp_mask);\n" }
43/2	2026/08/01 15:50	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 51483 output: 35 thoughts: 47 Thoughts: Okay, let's see. My first thought is: Decoding the `try_to_free_mem_cgroup_pages` Function. Hold on a second, isn't that `try_to_free_mem_cgroup_pages` function defined inside an `#ifdef CONFIG_MEMCG` preprocessor block? That would mean it's only active if memory cgroups are enabled in the kernel config. I need to be sure about this, so I will double-check. I'm going to jump into `mm/vmscan.c` and take a look around line 6890, just to confirm my initial hunch. Understanding that conditional compilation is crucial for me, given the modular nature of the kernel. This will likely provide key context for understanding how memory management and cgroups are integrated, and how that code path behaves under different configurations.
44/2	2026/08/01 15:50	tool	read-file	0m Args: { "File": "mm/vmscan.c", "FirstLine": 6880, "LineCount": 20 } Results: { "Contents": "6880:\t\ttrace_mm_vmscan_direct_reclaim_begin(sc.gfp_mask, order, NULL);\n6881:\t\n6882:\t\tnr_reclaimed = do_try_to_free_pages(zonelist, \u0026sc);\n6883:\t\n6884:\t\ttrace_mm_vmscan_direct_reclaim_end(nr_reclaimed, NULL);\n6885:\t\tset_task_reclaim_state(current, NULL);\n6886:\t\n6887:\t\treturn nr_reclaimed;\n6888:\t}\n6889:\t\n6890:\t#ifdef CONFIG_MEMCG\n6891:\t\n6892:\t/* Only used by soft limit reclaim. Do not reuse for anything else. /\n6893:\tunsigned long mem_cgroup_shrink_node(struct mem_cgroup memcg,\n6894:\t\t\t\t\t\t\tgfp_t gfp_mask, bool noswap,\n6895:\t\t\t\t\t\t\tpg_data_t pgdat,\n6896:\t\t\t\t\t\t\tunsigned long nr_scanned)\n6897:\t{\n6898:\t\tstruct lruvec *lruvec = mem_cgroup_lruvec(memcg, pgdat);\n6899:\t\tstruct scan_control sc = {\n" }
45/2	2026/08/01 15:50	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 52096 output: 35 thoughts: 230 Thoughts: My Analysis of the MGLRU Patch Okay, so I've pinpointed that the crucial modifications are indeed within the `#ifdef CONFIG_MEMCG` block. That settles it; I need to add `MEMCG` to my `EnableConfigs` list. No question there. Let's break this down. The patch's `WorthFuzzing` flag is set to true, and rightly so. The changes touch the Multi-Gen LRU (MGLRU) page reclaim logic – a core piece of the memory management subsystem. This includes alterations to how generation sequences increment, folio scanning and isolation, and the conditions for aging. These are functional modifications affecting reachable core kernel logic, which definitely justifies fuzzing. My `FocusSymbols` are clearly defined: `try_to_free_pages`, `try_to_free_mem_cgroup_pages`, `user_proactive_reclaim`, and `shrink_all_memory`. And for `EnableConfigs`, I'll be including `LRU_GEN`, `LRU_GEN_ENABLED`, and now `MEMCG`. Hold on a second... `shrink_all_memory`... that's ringing a bell. I need to be sure about that one. My initial assessment had it in the 'safe' list, so I need to check its context. Let me quickly cross-reference that against `mm/vmscan.c`, specifically around line 7731. Just to be completely certain I haven't missed any dependencies that would shift this into the 'safe' zone. Always good to double-check.
46/2	2026/08/01 15:50	tool	read-file	0m Args: { "File": "mm/vmscan.c", "FirstLine": 7720, "LineCount": 20 } Results: { "Contents": "7720:\t}\n7721:\t\n7722:\t#ifdef CONFIG_HIBERNATION\n7723:\t/\n7724:\t Try to free `nr_to_reclaim' of memory, system-wide, and return the number of\n7725:\t * freed pages.\n7726:\t \n7727:\t Rather than trying to age LRUs the aim is to preserve the overall\n7728:\t * LRU order by reclaiming preferentially\n7729:\t * inactive \u003e active \u003e active referenced \u003e active mapped\n7730:\t */\n7731:\tunsigned long shrink_all_memory(unsigned long nr_to_reclaim)\n7732:\t{\n7733:\t\tstruct scan_control sc = {\n7734:\t\t\t.nr_to_reclaim = nr_to_reclaim,\n7735:\t\t\t.gfp_mask = GFP_HIGHUSER_MOVABLE,\n7736:\t\t\t.reclaim_idx = MAX_NR_ZONES - 1,\n7737:\t\t\t.priority = DEF_PRIORITY,\n7738:\t\t\t.may_writepage = 1,\n7739:\t\t\t.may_unmap = 1,\n" }
47/2	2026/08/01 15:50	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 53022 output: 151 thoughts: 184 Thoughts: My Configuration Dependencies Okay, so I'm looking at this section, and it's definitely nestled within `#ifdef CONFIG_HIBERNATION`. That's good to know, but I don't think I need to explicitly include `HIBERNATION` in the `EnableConfigs` list. My reasoning is that the presence of `try_to_free_pages` and `user_proactive_reclaim` should be sufficient to get the code I need to run. So, my list will just include those: `try_to_free_pages`, `try_to_free_mem_cgroup_pages`, and `user_proactive_reclaim`. Now, before I commit to that, let's just double-check for any other dependencies I might be missing. Ah, here we go, looking at `CONFIG_LRU_GEN`. I see that it depends on `MMU`, but that's a near certainty, as `MMU` is enabled by default on virtually all relevant architectures. And then `CONFIG_LRU_GEN_ENABLED` depends on `LRU_GEN`, so if `LRU_GEN` is there, the enabled version should be too. That seems straightforward enough: `LRU_GEN` and `LRU_GEN_ENABLED` should be all I need. Alright, with that clarified, I'm ready to craft the response.
48/2	2026/08/01 15:51	tool	set-results	0m Args: { "EnableConfigs": [ "LRU_GEN", "LRU_GEN_ENABLED", "MEMCG" ], "FocusSymbols": [ "try_to_free_pages", "try_to_free_mem_cgroup_pages", "user_proactive_reclaim" ], "Reasoning": "The patch modifies the Multi-Gen LRU (MGLRU) page reclaim logic in the core memory management subsystem. It changes how the minimum generation sequence is incremented, how folios are scanned and isolated, and the conditions for running aging. These are functional changes to reachable core kernel logic that should be fuzzed.", "WorthFuzzing": true } Results: { "EnableConfigs": [ "LRU_GEN", "LRU_GEN_ENABLED", "MEMCG" ], "FocusSymbols": [ "try_to_free_pages", "try_to_free_mem_cgroup_pages", "user_proactive_reclaim" ], "Reasoning": "The patch modifies the Multi-Gen LRU (MGLRU) page reclaim logic in the core memory management subsystem. It changes how the minimum generation sequence is incremented, how folios are scanned and isolated, and the conditions for running aging. These are functional changes to reachable core kernel logic that should be fuzzed.", "WorthFuzzing": true }

{
  "EnableConfigs": [
    "LRU_GEN",
    "LRU_GEN_ENABLED",
    "MEMCG"
  ],
  "FocusSymbols": [
    "try_to_free_pages",
    "try_to_free_mem_cgroup_pages",
    "user_proactive_reclaim"
  ],
  "Reasoning": "The patch modifies the Multi-Gen LRU (MGLRU) page reclaim logic in the core memory management subsystem. It changes how the minimum generation sequence is incremented, how folios are scanned and isolated, and the conditions for running aging. These are functional changes to reachable core kernel logic that should be fuzzed.",
  "WorthFuzzing": true
}

{
  "PatchDiff": "commit 49d388c9cbe725f42b50cee9e52614953b235c42\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Sat Aug 1 15:48:49 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/include/linux/mmzone.h b/include/linux/mmzone.h\nindex a26c8b8552222..233d2006a5417 100644\n--- a/include/linux/mmzone.h\n+++ b/include/linux/mmzone.h\n@@ -552,10 +552,8 @@ enum {\n  * The youngest generation number is stored in max_seq for both anon and file\n  * types as they are aged on an equal footing. The oldest generation numbers are\n  * stored in min_seq[] separately for anon and file types so that they can be\n- * incremented independently. Ideally min_seq[] are kept in sync when both anon\n- * and file types are evictable. However, to adapt to situations like extreme\n- * swappiness, they are allowed to be out of sync by at most\n- * MAX_NR_GENS-MIN_NR_GENS-1.\n+ * incremented independently. For both file and anonymous memory, the minimum\n+ * generation must be at least MIN_NR_GENS.\n  *\n  * The number of pages in each generation is eventually consistent and therefore\n  * can be transiently negative when reset_batch_size() is pending.\ndiff --git a/mm/vmscan.c b/mm/vmscan.c\nindex 17d2b793cbfc4..396e47e327bc8 100644\n--- a/mm/vmscan.c\n+++ b/mm/vmscan.c\n@@ -3982,16 +3982,6 @@ static void try_to_inc_min_seq(struct lruvec *lruvec, int swappiness)\n \tif (!seq_inc_flag)\n \t\treturn;\n \n-\t/* see the comment on lru_gen_folio */\n-\tif (swappiness \u0026\u0026 swappiness \u003c= MAX_SWAPPINESS) {\n-\t\tunsigned long seq = lrugen-\u003emax_seq - MIN_NR_GENS;\n-\n-\t\tif (min_seq[LRU_GEN_ANON] \u003e seq \u0026\u0026 min_seq[LRU_GEN_FILE] \u003c seq)\n-\t\t\tmin_seq[LRU_GEN_ANON] = seq;\n-\t\telse if (min_seq[LRU_GEN_FILE] \u003e seq \u0026\u0026 min_seq[LRU_GEN_ANON] \u003c seq)\n-\t\t\tmin_seq[LRU_GEN_FILE] = seq;\n-\t}\n-\n \tfor_each_evictable_type(type, swappiness) {\n \t\tif (min_seq[type] \u003c= lrugen-\u003emin_seq[type])\n \t\t\tcontinue;\n@@ -4727,7 +4717,8 @@ static bool isolate_folio(struct lruvec *lruvec, struct folio *folio, struct sca\n \n static int scan_folios(unsigned long nr_to_scan, struct lruvec *lruvec,\n \t\t       struct scan_control *sc, int type, int tier,\n-\t\t       struct list_head *list, int *isolatedp)\n+\t\t       struct list_head *list, int *isolatedp,\n+\t\t       bool *exhausted)\n {\n \tint i;\n \tint gen;\n@@ -4738,15 +4729,18 @@ static int scan_folios(unsigned long nr_to_scan, struct lruvec *lruvec,\n \tint skipped = 0;\n \tunsigned long remaining = nr_to_scan;\n \tstruct lru_gen_folio *lrugen = \u0026lruvec-\u003elrugen;\n+\tunsigned long min_seq = lrugen-\u003emin_seq[type];\n \n \tVM_WARN_ON_ONCE(nr_to_scan \u003e MAX_LRU_BATCH);\n \tVM_WARN_ON_ONCE(!list_empty(list));\n \n-\tif (get_nr_gens(lruvec, type) == MIN_NR_GENS)\n+\tif (get_nr_gens(lruvec, type) == MIN_NR_GENS) {\n+\t\t*exhausted = true;\n \t\treturn 0;\n+\t}\n \n-\tgen = lru_gen_from_seq(lrugen-\u003emin_seq[type]);\n-\n+next_gen:\n+\tgen = lru_gen_from_seq(min_seq);\n \tfor (i = MAX_NR_ZONES; i \u003e 0; i--) {\n \t\tLIST_HEAD(moved);\n \t\tint skipped_zone = 0;\n@@ -4788,6 +4782,14 @@ static int scan_folios(unsigned long nr_to_scan, struct lruvec *lruvec,\n \t\t\tbreak;\n \t}\n \n+\t/*\n+\t * This generation is exhausted across all zones, but the scan\n+\t * target has not been reached yet. Continue with the next\n+\t * reclaimable generation.\n+\t */\n+\tif (i == 0 \u0026\u0026 ++min_seq + MIN_NR_GENS \u003c= lrugen-\u003emax_seq)\n+\t\tgoto next_gen;\n+\n \titem = PGSCAN_KSWAPD + reclaimer_offset(sc);\n \tmod_lruvec_state(lruvec, item, isolated);\n \tmod_lruvec_state(lruvec, PGREFILL, sorted);\n@@ -4796,6 +4798,11 @@ static int scan_folios(unsigned long nr_to_scan, struct lruvec *lruvec,\n \t\t\t\tscanned, skipped, isolated,\n \t\t\t\ttype ? LRU_INACTIVE_FILE : LRU_INACTIVE_ANON);\n \n+\t/*\n+\t * This scan exhausted the reclaimable lists before reaching the\n+\t * scan target or accumulating enough isolated folios.\n+\t */\n+\t*exhausted = remaining \u003e 0 \u0026\u0026 isolated \u003c MIN_LRU_BATCH;\n \t*isolatedp = isolated;\n \treturn scanned;\n }\n@@ -4839,35 +4846,42 @@ static int get_type_to_scan(struct lruvec *lruvec, int swappiness)\n \treturn positive_ctrl_err(\u0026sp, \u0026pv);\n }\n \n+static inline bool is_single_type_reclaim(int swappiness)\n+{\n+\treturn swappiness == MIN_SWAPPINESS ||\n+\t       swappiness == SWAPPINESS_ANON_ONLY;\n+}\n+\n static int isolate_folios(unsigned long nr_to_scan, struct lruvec *lruvec,\n \t\t\t  struct scan_control *sc, int swappiness,\n \t\t\t  struct list_head *list, int *isolated,\n \t\t\t  int *isolate_type, int *isolate_scanned)\n {\n-\tint i;\n-\tint total_scanned = 0;\n+\tbool single_type = is_single_type_reclaim(swappiness);\n \tint type = get_type_to_scan(lruvec, swappiness);\n+\tint total_scanned = 0, scanned, tier;\n+\tbool tried = false, exhausted;\n \n-\tfor_each_evictable_type(i, swappiness) {\n-\t\tint scanned;\n-\t\tint tier = get_tier_idx(lruvec, type);\n+retry:\n+\ttier = get_tier_idx(lruvec, type);\n+\tscanned = scan_folios(nr_to_scan, lruvec, sc,\n+\t\t\t      type, tier, list, isolated, \u0026exhausted);\n \n-\t\tscanned = scan_folios(nr_to_scan, lruvec, sc,\n-\t\t\t\t      type, tier, list, isolated);\n+\ttotal_scanned += scanned;\n+\tif (*isolated) {\n+\t\t*isolate_type = type;\n+\t\t*isolate_scanned = scanned;\n+\t\treturn total_scanned;\n+\t}\n \n-\t\ttotal_scanned += scanned;\n-\t\tif (*isolated) {\n-\t\t\t*isolate_type = type;\n-\t\t\t*isolate_scanned = scanned;\n-\t\t\tbreak;\n-\t\t}\n-\t\t/*\n-\t\t * If scanned \u003e 0 and isolated == 0, avoid falling back to the\n-\t\t * other type, as this type remains sufficient. Falling back\n-\t\t * too readily can disrupt the positive_ctrl_err() bias.\n-\t\t */\n-\t\tif (!scanned)\n-\t\t\ttype = !type;\n+\t/*\n+\t * We are running out of the current reclaim type. Fall back to\n+\t * the other type if allowed.\n+\t */\n+\tif (!tried \u0026\u0026 exhausted \u0026\u0026 !single_type) {\n+\t\ttype = !type;\n+\t\ttried = true;\n+\t\tgoto retry;\n \t}\n \n \treturn total_scanned;\n@@ -4969,21 +4983,82 @@ static int evict_folios(unsigned long nr_to_scan, struct lruvec *lruvec,\n \treturn scanned;\n }\n \n+static inline bool swappiness_is_balanced(int swappiness)\n+{\n+\tint range = MAX_SWAPPINESS - MIN_SWAPPINESS;\n+\tint middle = MIN_SWAPPINESS + range / 2;\n+\n+\treturn swappiness \u003e= middle - range / 5 \u0026\u0026\n+\t       swappiness \u003c= middle + range / 5;\n+}\n+\n+static bool lru_gen_imbalanced(struct lruvec *lruvec, int type,\n+\t\tunsigned long max_seq, unsigned long min_seq,\n+\t\tstruct scan_control *sc, int swappiness)\n+{\n+\tstruct lru_gen_folio *lrugen = \u0026lruvec-\u003elrugen;\n+\tunsigned long young = 0, old = 0, seq;\n+\tunsigned long old_ratio, gb;\n+\n+\t/* Skip swappiness bias for single-type reclaim or balanced swappiness */\n+\tif (is_single_type_reclaim(swappiness) || swappiness_is_balanced(swappiness))\n+\t\treturn false;\n+\n+\t/* More than two generations remain to reclaim */\n+\tif (min_seq + MIN_NR_GENS \u003c max_seq)\n+\t\treturn false;\n+\n+\t/*\n+\t * Run aging if the only remaining reclaimable generation\n+\t * has few folios.\n+\t */\n+\tfor (seq = min_seq; seq \u003c= max_seq; seq++) {\n+\t\tint gen = lru_gen_from_seq(seq);\n+\t\tunsigned long size = 0;\n+\t\tint zone;\n+\n+\t\tfor (zone = 0; zone \u003c MAX_NR_ZONES; zone++)\n+\t\t\tsize += max(READ_ONCE(lrugen-\u003enr_pages[gen][type][zone]), 0L);\n+\n+\t\tif (seq + MIN_NR_GENS \u003e max_seq)\n+\t\t\tyoung += size;\n+\t\telse\n+\t\t\told += size;\n+\t}\n+\t/*\n+\t * Copied from inactive_is_low(), but uses a higher old_ratio to\n+\t * make aging less aggressive.\n+\t */\n+\tgb = (young + old) \u003e\u003e (30 - PAGE_SHIFT);\n+\told_ratio = gb ? int_sqrt(10 * gb) : 1;\n+\told_ratio *= MAX_NR_GENS;\n+\treturn young \u003e old * old_ratio;\n+}\n+\n static bool should_run_aging(struct lruvec *lruvec, unsigned long max_seq,\n \t\t\t     struct scan_control *sc, int swappiness)\n {\n+\tint type = get_type_to_scan(lruvec, swappiness);\n \tDEFINE_MIN_SEQ(lruvec);\n \n \t/* have to run aging, since eviction is not possible anymore */\n \tif (evictable_min_seq(min_seq, swappiness) + MIN_NR_GENS \u003e max_seq)\n \t\treturn true;\n \n+\t/* run aging if the preferred type is exhausted for extreme swappiness */\n+\tif (min_seq[type] + MIN_NR_GENS \u003e max_seq \u0026\u0026 !swappiness_is_balanced(swappiness))\n+\t\treturn true;\n+\n \t/* try to avoid aging, do gentle reclaim at the default priority */\n \tif (sc-\u003epriority == DEF_PRIORITY)\n \t\treturn false;\n \n \t/* better to run aging even though eviction is still possible */\n-\treturn evictable_min_seq(min_seq, swappiness) + MIN_NR_GENS == max_seq;\n+\tif (evictable_min_seq(min_seq, swappiness) + MIN_NR_GENS == max_seq)\n+\t\treturn true;\n+\n+\t/* Run aging if the preferred type is severely imbalanced across gens */\n+\treturn lru_gen_imbalanced(lruvec, type, max_seq, min_seq[type], sc, swappiness);\n }\n \n static long get_nr_to_scan(struct lruvec *lruvec, struct scan_control *sc,\n"
}

{
  "EnableConfigs": [
    "LRU_GEN",
    "LRU_GEN_ENABLED",
    "MEMCG"
  ],
  "FocusSymbols": [
    "try_to_free_pages",
    "try_to_free_mem_cgroup_pages",
    "user_proactive_reclaim"
  ],
  "Reasoning": "The patch modifies the Multi-Gen LRU (MGLRU) page reclaim logic in the core memory management subsystem. It changes how the minimum generation sequence is incremented, how folios are scanned and isolated, and the conditions for running aging. These are functional changes to reachable core kernel logic that should be fuzzed.",
  "WorthFuzzing": true
}

You are an expert Linux kernel maintainer.
Your job is to review a provided patch series and determine
if it makes functional changes to the kernel that should be fuzzed.

IMPORTANT: The changes have ALREADY been applied and committed as the HEAD commit in
your workspace. Do NOT rely on your internal knowledge of the kernel. You must actively
use your code access tools to examine the actual source code and confirm any assumptions.

Return WorthFuzzing=false if the patch only contains:
- Modifications to Documentation/, Kconfig files, or code comments.
- Purely decorative changes, such as logging (e.g., pr_err, printk) or tracepoints.
- Changes to numeric constants or macros that do not functionally alter execution flow.
- Code paths that are impossible to reach in virtualized environments like GCE or QEMU,
  even when utilizing software-emulated hardware (e.g., usb gadget, mac80211_hwsim).
- Code in vendor-specific PCIe switch, SmartNIC, or GPU drivers (e.g., mlxsw, pds_core, qed,
  ionic, amdgpu) that require physical PCIe hardware cards not emulated in standard QEMU.
- Driver .remove, .shutdown, or pci_unregister_driver teardown callbacks (e.g., igb_remove)
  that are executed only during PCI hot-unplug or sysfs driver unbind operations.

If it modifies reachable core kernel logic, drivers, or architectures, use your code search
tools to verify the code can be executed, then return WorthFuzzing=true.

When returning WorthFuzzing=true, you MUST ALSO:
1. Extract any specific kernel functions that should be heavily fuzzed into FocusSymbols.
   Avoid listing generic hot-path functions to prevent skewed test distributions.
   Prefer non-static, non-inlined API entrypoint functions over internal static helper functions
   (which are inlined by the compiler and do not have distinct symbol addresses).
2. Identify any specific CONFIG_ options required to properly test this new/modified feature.
   Go and look into the Kconfig files and check for ifdefs around the code, do not make assumptions.
   Also check "depends on" lines in Kconfig to include any non-standard parent subsystem configs
   needed for Kbuild to compile the code statically into vmlinux. List them in the EnableConfigs
   output array, and DO NOT add a 'CONFIG_' prefix (e.g., return "NET_IPV4" instead of "CONFIG_NET_IPV4").
Prefer calling several tools at the same time to save round-trips.


Use set-results tool to provide results of the analysis.
It must be called exactly once before the final reply.
Ignore results of this tool.

For your convenience, here is the diff of the changes:
commit 49d388c9cbe725f42b50cee9e52614953b235c42
Author: syz-cluster <triage@syzkaller.com>
Date:   Sat Aug 1 15:48:49 2026 +0000

    syz-cluster: applied patch under review

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index a26c8b8552222..233d2006a5417 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -552,10 +552,8 @@ enum {
  * The youngest generation number is stored in max_seq for both anon and file
  * types as they are aged on an equal footing. The oldest generation numbers are
  * stored in min_seq[] separately for anon and file types so that they can be
- * incremented independently. Ideally min_seq[] are kept in sync when both anon
- * and file types are evictable. However, to adapt to situations like extreme
- * swappiness, they are allowed to be out of sync by at most
- * MAX_NR_GENS-MIN_NR_GENS-1.
+ * incremented independently. For both file and anonymous memory, the minimum
+ * generation must be at least MIN_NR_GENS.
  *
  * The number of pages in each generation is eventually consistent and therefore
  * can be transiently negative when reset_batch_size() is pending.
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 17d2b793cbfc4..396e47e327bc8 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -3982,16 +3982,6 @@ static void try_to_inc_min_seq(struct lruvec *lruvec, int swappiness)
 	if (!seq_inc_flag)
 		return;
 
-	/* see the comment on lru_gen_folio */
-	if (swappiness && swappiness <= MAX_SWAPPINESS) {
-		unsigned long seq = lrugen->max_seq - MIN_NR_GENS;
-
-		if (min_seq[LRU_GEN_ANON] > seq && min_seq[LRU_GEN_FILE] < seq)
-			min_seq[LRU_GEN_ANON] = seq;
-		else if (min_seq[LRU_GEN_FILE] > seq && min_seq[LRU_GEN_ANON] < seq)
-			min_seq[LRU_GEN_FILE] = seq;
-	}
-
 	for_each_evictable_type(type, swappiness) {
 		if (min_seq[type] <= lrugen->min_seq[type])
 			continue;
@@ -4727,7 +4717,8 @@ static bool isolate_folio(struct lruvec *lruvec, struct folio *folio, struct sca
 
 static int scan_folios(unsigned long nr_to_scan, struct lruvec *lruvec,
 		       struct scan_control *sc, int type, int tier,
-		       struct list_head *list, int *isolatedp)
+		       struct list_head *list, int *isolatedp,
+		       bool *exhausted)
 {
 	int i;
 	int gen;
@@ -4738,15 +4729,18 @@ static int scan_folios(unsigned long nr_to_scan, struct lruvec *lruvec,
 	int skipped = 0;
 	unsigned long remaining = nr_to_scan;
 	struct lru_gen_folio *lrugen = &lruvec->lrugen;
+	unsigned long min_seq = lrugen->min_seq[type];
 
 	VM_WARN_ON_ONCE(nr_to_scan > MAX_LRU_BATCH);
 	VM_WARN_ON_ONCE(!list_empty(list));
 
-	if (get_nr_gens(lruvec, type) == MIN_NR_GENS)
+	if (get_nr_gens(lruvec, type) == MIN_NR_GENS) {
+		*exhausted = true;
 		return 0;
+	}
 
-	gen = lru_gen_from_seq(lrugen->min_seq[type]);
-
+next_gen:
+	gen = lru_gen_from_seq(min_seq);
 	for (i = MAX_NR_ZONES; i > 0; i--) {
 		LIST_HEAD(moved);
 		int skipped_zone = 0;
@@ -4788,6 +4782,14 @@ static int scan_folios(unsigned long nr_to_scan, struct lruvec *lruvec,
 			break;
 	}
 
+	/*
+	 * This generation is exhausted across all zones, but the scan
+	 * target has not been reached yet. Continue with the next
+	 * reclaimable generation.
+	 */
+	if (i == 0 && ++min_seq + MIN_NR_GENS <= lrugen->max_seq)
+		goto next_gen;
+
 	item = PGSCAN_KSWAPD + reclaimer_offset(sc);
 	mod_lruvec_state(lruvec, item, isolated);
 	mod_lruvec_state(lruvec, PGREFILL, sorted);
@@ -4796,6 +4798,11 @@ static int scan_folios(unsigned long nr_to_scan, struct lruvec *lruvec,
 				scanned, skipped, isolated,
 				type ? LRU_INACTIVE_FILE : LRU_INACTIVE_ANON);
 
+	/*
+	 * This scan exhausted the reclaimable lists before reaching the
+	 * scan target or accumulating enough isolated folios.
+	 */
+	*exhausted = remaining > 0 && isolated < MIN_LRU_BATCH;
 	*isolatedp = isolated;
 	return scanned;
 }
@@ -4839,35 +4846,42 @@ static int get_type_to_scan(struct lruvec *lruvec, int swappiness)
 	return positive_ctrl_err(&sp, &pv);
 }
 
+static inline bool is_single_type_reclaim(int swappiness)
+{
+	return swappiness == MIN_SWAPPINESS ||
+	       swappiness == SWAPPINESS_ANON_ONLY;
+}
+
 static int isolate_folios(unsigned long nr_to_scan, struct lruvec *lruvec,
 			  struct scan_control *sc, int swappiness,
 			  struct list_head *list, int *isolated,
 			  int *isolate_type, int *isolate_scanned)
 {
-	int i;
-	int total_scanned = 0;
+	bool single_type = is_single_type_reclaim(swappiness);
 	int type = get_type_to_scan(lruvec, swappiness);
+	int total_scanned = 0, scanned, tier;
+	bool tried = false, exhausted;
 
-	for_each_evictable_type(i, swappiness) {
-		int scanned;
-		int tier = get_tier_idx(lruvec, type);
+retry:
+	tier = get_tier_idx(lruvec, type);
+	scanned = scan_folios(nr_to_scan, lruvec, sc,
+			      type, tier, list, isolated, &exhausted);
 
-		scanned = scan_folios(nr_to_scan, lruvec, sc,
-				      type, tier, list, isolated);
+	total_scanned += scanned;
+	if (*isolated) {
+		*isolate_type = type;
+		*isolate_scanned = scanned;
+		return total_scanned;
+	}
 
-		total_scanned += scanned;
-		if (*isolated) {
-			*isolate_type = type;
-			*isolate_scanned = scanned;
-			break;
-		}
-		/*
-		 * If scanned > 0 and isolated == 0, avoid falling back to the
-		 * other type, as this type remains sufficient. Falling back
-		 * too readily can disrupt the positive_ctrl_err() bias.
-		 */
-		if (!scanned)
-			type = !type;
+	/*
+	 * We are running out of the current reclaim type. Fall back to
+	 * the other type if allowed.
+	 */
+	if (!tried && exhausted && !single_type) {
+		type = !type;
+		tried = true;
+		goto retry;
 	}
 
 	return total_scanned;
@@ -4969,21 +4983,82 @@ static int evict_folios(unsigned long nr_to_scan, struct lruvec *lruvec,
 	return scanned;
 }
 
+static inline bool swappiness_is_balanced(int swappiness)
+{
+	int range = MAX_SWAPPINESS - MIN_SWAPPINESS;
+	int middle = MIN_SWAPPINESS + range / 2;
+
+	return swappiness >= middle - range / 5 &&
+	       swappiness <= middle + range / 5;
+}
+
+static bool lru_gen_imbalanced(struct lruvec *lruvec, int type,
+		unsigned long max_seq, unsigned long min_seq,
+		struct scan_control *sc, int swappiness)
+{
+	struct lru_gen_folio *lrugen = &lruvec->lrugen;
+	unsigned long young = 0, old = 0, seq;
+	unsigned long old_ratio, gb;
+
+	/* Skip swappiness bias for single-type reclaim or balanced swappiness */
+	if (is_single_type_reclaim(swappiness) || swappiness_is_balanced(swappiness))
+		return false;
+
+	/* More than two generations remain to reclaim */
+	if (min_seq + MIN_NR_GENS < max_seq)
+		return false;
+
+	/*
+	 * Run aging if the only remaining reclaimable generation
+	 * has few folios.
+	 */
+	for (seq = min_seq; seq <= max_seq; seq++) {
+		int gen = lru_gen_from_seq(seq);
+		unsigned long size = 0;
+		int zone;
+
+		for (zone = 0; zone < MAX_NR_ZONES; zone++)
+			size += max(READ_ONCE(lrugen->nr_pages[gen][type][zone]), 0L);
+
+		if (seq + MIN_NR_GENS > max_seq)
+			young += size;
+		else
+			old += size;
+	}
+	/*
+	 * Copied from inactive_is_low(), but uses a higher old_ratio to
+	 * make aging less aggressive.
+	 */
+	gb = (young + old) >> (30 - PAGE_SHIFT);
+	old_ratio = gb ? int_sqrt(10 * gb) : 1;
+	old_ratio *= MAX_NR_GENS;
+	return young > old * old_ratio;
+}
+
 static bool should_run_aging(struct lruvec *lruvec, unsigned long max_seq,
 			     struct scan_control *sc, int swappiness)
 {
+	int type = get_type_to_scan(lruvec, swappiness);
 	DEFINE_MIN_SEQ(lruvec);
 
 	/* have to run aging, since eviction is not possible anymore */
 	if (evictable_min_seq(min_seq, swappiness) + MIN_NR_GENS > max_seq)
 		return true;
 
+	/* run aging if the preferred type is exhausted for extreme swappiness */
+	if (min_seq[type] + MIN_NR_GENS > max_seq && !swappiness_is_balanced(swappiness))
+		return true;
+
 	/* try to avoid aging, do gentle reclaim at the default priority */
 	if (sc->priority == DEF_PRIORITY)
 		return false;
 
 	/* better to run aging even though eviction is still possible */
-	return evictable_min_seq(min_seq, swappiness) + MIN_NR_GENS == max_seq;
+	if (evictable_min_seq(min_seq, swappiness) + MIN_NR_GENS == max_seq)
+		return true;
+
+	/* Run aging if the preferred type is severely imbalanced across gens */
+	return lru_gen_imbalanced(lruvec, type, max_seq, min_seq[type], sc, swappiness);
 }
 
 static long get_nr_to_scan(struct lruvec *lruvec, struct scan_control *sc,

gemini-3.1-pro-preview

							input: 5031
							output: 19
							thoughts: 186

**Analyzing the MGLRU Patch for Fuzzing Potential**

Okay, so I've got this patch – it's touching `mm/vmscan.c` and `include/linux/mmzone.h`. Alarm bells are already going off; anything near memory management is critical and *always* a good candidate for fuzzing. This one is specifically dealing with the Multi-Gen LRU reclaim logic (MGLRU). It looks like the patch is reworking some key functions: `try_to_inc_min_seq`, `scan_folios`, `isolate_folios`, `evict_folios`, and `should_run_aging`, and introducing a few new ones like `is_single_type_reclaim`, `swappiness_is_balanced`, and `lru_gen_imbalanced`. Definitely a high-value target. My gut tells me this is ripe for fuzzing.

My next step is to figure out the pre-requisites. I need to nail down the configuration options that enable MGLRU. Typically, `CONFIG_LRU_GEN` is the key. So, let's dive into the kernel's Kconfig files, specifically within `mm/` or potentially related areas, to find the exact dependency for `LRU_GEN`.

{
  "Expression": "config LRU_GEN"
}

{
  "Output": "mm/Kconfig=1390=config PTE_MARKER_UFFD_WP\n--\nmm/Kconfig-1400-# multi-gen LRU {\nmm/Kconfig:1401:config LRU_GEN\nmm/Kconfig-1402-\tbool \"Multi-Gen LRU\"\n--\nmm/Kconfig-1409-\nmm/Kconfig:1410:config LRU_GEN_ENABLED\nmm/Kconfig-1411-\tbool \"Enable by default\"\n--\nmm/Kconfig-1415-\nmm/Kconfig:1416:config LRU_GEN_STATS\nmm/Kconfig-1417-\tbool \"Full stats for debugging\"\n--\nmm/Kconfig-1424-\nmm/Kconfig:1425:config LRU_GEN_WALKS_MMU\nmm/Kconfig-1426-\tdef_bool y\n"
}

gemini-3.1-pro-preview

							input: 5745
							output: 18
							thoughts: 140

Okay, let's break this down.

**Analyzing LRU Generation Configuration and Impact**

Right, so we're looking at enabling `CONFIG_LRU_GEN` and `CONFIG_LRU_GEN_ENABLED`. That makes sense; it's the foundation we're building on. Now, the key is to understand what enabling these flags *does* in the code. Let's see... what functions are being touched? Okay, it looks like `try_to_inc_min_seq`, `scan_folios`, `isolate_folios`, `evict_folios`, and `should_run_aging` are the ones that have been modified. These are all static, meaning they're internal to `mm/vmscan.c`.

That's helpful, but we need to see the *non-static* entry points to understand how these internal functions are being called. We need to trace the call paths. So, `evict_folios`, that's the one I'm most interested in. Where is it being called from? I'm betting that `lru_gen_shrink_lruvec` or something similar is involved. Better to just check `mm/vmscan.c` directly to be sure, that'll be the fastest way to get to the bottom of this.

{
  "Expression": "evict_folios"
}

{
  "Output": "mm/vmscan.c=4855=static int isolate_folios(unsigned long nr_to_scan, struct lruvec *lruvec,\n--\nmm/vmscan.c-4889-\nmm/vmscan.c:4890:static int evict_folios(unsigned long nr_to_scan, struct lruvec *lruvec,\nmm/vmscan.c-4891-\t\t\tstruct scan_control *sc, int swappiness)\n--\nmm/vmscan.c=5130=static bool try_to_shrink_lruvec(struct lruvec *lruvec, struct scan_control *sc)\n--\nmm/vmscan.c-5153-\t\tnr_batch = min(nr_to_scan, MIN_LRU_BATCH);\nmm/vmscan.c:5154:\t\tdelta = evict_folios(nr_batch, lruvec, sc, swappiness);\nmm/vmscan.c-5155-\t\tif (!delta)\n--\nmm/vmscan.c=5757=static int run_eviction(struct lruvec *lruvec, unsigned long seq, struct scan_control *sc,\n--\nmm/vmscan.c-5777-\t\tnr_batch = min(nr_to_reclaim - sc-\u003enr_reclaimed, MAX_LRU_BATCH);\nmm/vmscan.c:5778:\t\tif (!evict_folios(nr_batch, lruvec, sc, swappiness))\nmm/vmscan.c-5779-\t\t\treturn 0;\n"
}

gemini-3.1-pro-preview

							input: 6577
							output: 23
							thoughts: 50

Here's my thought process, as if I were analyzing this code:

**Deep Dive into LRU Vector Eviction**

Okay, so I'm looking at how this system handles memory pressure. It seems like both `try_to_shrink_lruvec` and `run_eviction` eventually funnel down to `evict_folios`. That's the core eviction logic, clearly. My next step is to trace the call paths to those two functions, `try_to_shrink_lruvec` and `run_eviction`. I want to understand *when* and *why* these eviction routines are triggered. What events or conditions lead the system to decide it's time to reclaim some memory? Is it based on explicit requests, detected thresholds, or a background process? Understanding the callers will give me a solid picture of the overall eviction strategy. This analysis will guide my understanding of the system's memory management policy.

{
  "Expression": "try_to_shrink_lruvec"
}

{
  "Output": "mm/vmscan.c=5095=static bool should_abort_scan(struct lruvec *lruvec, struct scan_control *sc)\n--\nmm/vmscan.c-5129- */\nmm/vmscan.c:5130:static bool try_to_shrink_lruvec(struct lruvec *lruvec, struct scan_control *sc)\nmm/vmscan.c-5131-{\n--\nmm/vmscan.c=5175=static int shrink_one(struct lruvec *lruvec, struct scan_control *sc)\n--\nmm/vmscan.c-5194-\nmm/vmscan.c:5195:\tneed_rotate = try_to_shrink_lruvec(lruvec, sc);\nmm/vmscan.c-5196-\n--\nmm/vmscan.c=5286=static void lru_gen_shrink_lruvec(struct lruvec *lruvec, struct scan_control *sc)\n--\nmm/vmscan.c-5298-\nmm/vmscan.c:5299:\tif (try_to_shrink_lruvec(lruvec, sc))\nmm/vmscan.c-5300-\t\tlru_gen_rotate_memcg(lruvec, MEMCG_LRU_YOUNG);\n"
}

gemini-3.1-pro-preview

							input: 7193
							output: 18
							thoughts: 28

Here's my summary, as though I'm thinking through this process:

**Evaluating Eviction Strategies**

Okay, so we're looking at memory eviction, and I need to figure out the best approach. My initial instinct is that `lru_gen_shrink_lruvec` is a strong contender. It's often effective, so it's a natural starting point. But I need to be thorough.

Let's not jump to conclusions. Before I commit to anything, I should definitively check how `run_eviction` interacts, how it might work as an alternative, or how it might inform the process. I need a holistic view before making a decision. Gotta consider the implications of *all* potential options.

{
  "Expression": "run_eviction"
}

{
  "Output": "mm/vmscan.c=5746=static int run_aging(struct lruvec *lruvec, unsigned long seq,\n--\nmm/vmscan.c-5756-\nmm/vmscan.c:5757:static int run_eviction(struct lruvec *lruvec, unsigned long seq, struct scan_control *sc,\nmm/vmscan.c-5758-\t\t\tint swappiness, unsigned long nr_to_reclaim)\n--\nmm/vmscan.c=5787=static int run_cmd(char cmd, u64 memcg_id, int nid, unsigned long seq,\n--\nmm/vmscan.c-5818-\tcase '-':\nmm/vmscan.c:5819:\t\terr = run_eviction(lruvec, seq, sc, swappiness, opt);\nmm/vmscan.c-5820-\t\tbreak;\n"
}

gemini-3.1-pro-preview

							input: 7629
							output: 24
							thoughts: 50

Okay, here's my interpretation of those thoughts, tailored for an expert audience, presented in the first person:

**Delving into MGLRU Debugging and Shrink Logic**

Alright, I'm digging into this `run_cmd` function within the MGLRU debugfs interface. It's obviously designed for interactive debugging and testing of the MGLRU implementation. My initial thought is to figure out exactly how it relates to the shrinking process.

Now, I'm wondering about the calls to `lru_gen_shrink_lruvec`. Specifically, does this get invoked only from `shrink_lruvec` and potentially `shrink_node`, or are there other call paths I need to be aware of? Best practice would be to confirm this. I will look into the surrounding code to determine the origin points of the call.

{
  "Expression": "lru_gen_shrink_lruvec"
}

{
  "Output": "mm/vmscan.c=5216=static void shrink_many(struct pglist_data *pgdat, struct scan_control *sc)\n--\nmm/vmscan.c-5285-\nmm/vmscan.c:5286:static void lru_gen_shrink_lruvec(struct lruvec *lruvec, struct scan_control *sc)\nmm/vmscan.c-5287-{\n--\nmm/vmscan.c=6030=static void lru_gen_age_node(struct pglist_data *pgdat, struct scan_control *sc)\n--\nmm/vmscan.c-6034-\nmm/vmscan.c:6035:static void lru_gen_shrink_lruvec(struct lruvec *lruvec, struct scan_control *sc)\nmm/vmscan.c-6036-{\n--\nmm/vmscan.c=6047=static void shrink_lruvec(struct lruvec *lruvec, struct scan_control *sc)\n--\nmm/vmscan.c-6058-\tif ((lru_gen_enabled() || lru_gen_switching()) \u0026\u0026 !root_reclaim(sc)) {\nmm/vmscan.c:6059:\t\tlru_gen_shrink_lruvec(lruvec, sc);\nmm/vmscan.c-6060-\n"
}

gemini-3.1-pro-preview

							input: 8236
							output: 19
							thoughts: 37

Here's my analysis of that snippet:

**Diving into the `shrink_lruvec` Function**

Okay, so I see that `shrink_lruvec` is calling `lru_gen_shrink_lruvec`. That's the core relationship here. My immediate question, though, is what *triggers* `shrink_lruvec`? It's a static function, which means its visibility and scope are limited, so I need to figure out the specific part of the code that's calling it. Knowing where this call originates will give me critical context on the broader LRU cache's behavior and performance implications, especially if I'm looking at optimization or debugging a potential issue. Need to trace back the call chain and understand its entry point.

{
  "Expression": "shrink_lruvec"
}

{
  "Output": "mm/vmscan.c=5095=static bool should_abort_scan(struct lruvec *lruvec, struct scan_control *sc)\n--\nmm/vmscan.c-5129- */\nmm/vmscan.c:5130:static bool try_to_shrink_lruvec(struct lruvec *lruvec, struct scan_control *sc)\nmm/vmscan.c-5131-{\n--\nmm/vmscan.c=5175=static int shrink_one(struct lruvec *lruvec, struct scan_control *sc)\n--\nmm/vmscan.c-5194-\nmm/vmscan.c:5195:\tneed_rotate = try_to_shrink_lruvec(lruvec, sc);\nmm/vmscan.c-5196-\n--\nmm/vmscan.c=5216=static void shrink_many(struct pglist_data *pgdat, struct scan_control *sc)\n--\nmm/vmscan.c-5285-\nmm/vmscan.c:5286:static void lru_gen_shrink_lruvec(struct lruvec *lruvec, struct scan_control *sc)\nmm/vmscan.c-5287-{\n--\nmm/vmscan.c-5298-\nmm/vmscan.c:5299:\tif (try_to_shrink_lruvec(lruvec, sc))\nmm/vmscan.c-5300-\t\tlru_gen_rotate_memcg(lruvec, MEMCG_LRU_YOUNG);\n--\nmm/vmscan.c=6030=static void lru_gen_age_node(struct pglist_data *pgdat, struct scan_control *sc)\n--\nmm/vmscan.c-6034-\nmm/vmscan.c:6035:static void lru_gen_shrink_lruvec(struct lruvec *lruvec, struct scan_control *sc)\nmm/vmscan.c-6036-{\n--\nmm/vmscan.c=6040=static void lru_gen_shrink_node(struct pglist_data *pgdat, struct scan_control *sc)\n--\nmm/vmscan.c-6046-\nmm/vmscan.c:6047:static void shrink_lruvec(struct lruvec *lruvec, struct scan_control *sc)\nmm/vmscan.c-6048-{\n--\nmm/vmscan.c-6058-\tif ((lru_gen_enabled() || lru_gen_switching()) \u0026\u0026 !root_reclaim(sc)) {\nmm/vmscan.c:6059:\t\tlru_gen_shrink_lruvec(lruvec, sc);\nmm/vmscan.c-6060-\n--\nmm/vmscan.c=6238=static void shrink_node_memcgs(pg_data_t *pgdat, struct scan_control *sc)\n--\nmm/vmscan.c-6297-\nmm/vmscan.c:6298:\t\tshrink_lruvec(lruvec, sc);\nmm/vmscan.c-6299-\n--\nmm/vmscan.c=6893=unsigned long mem_cgroup_shrink_node(struct mem_cgroup *memcg,\n--\nmm/vmscan.c-6923-\t */\nmm/vmscan.c:6924:\tshrink_lruvec(lruvec, \u0026sc);\nmm/vmscan.c-6925-\n"
}

gemini-3.1-pro-preview

							input: 9358
							output: 17
							thoughts: 25

Here's a summary of my thought process:

**Diving into Memory Management - A Quick Scan**

Alright, so `mem_cgroup_shrink_node` isn't static. That's a good starting point. Now, let's see what that means, where this leads us. My next step is to examine `shrink_node`. I need to understand its relationship to `mem_cgroup_shrink_node`. What is its purpose? Where is it used? Let's trace this and see what we can find.

{
  "Expression": "shrink_node"
}

{
  "Output": "mm/internal.h=83=unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *memcg,\n--\nmm/internal.h-87-\t\t\t\t\t   int *swappiness);\nmm/internal.h:88:unsigned long mem_cgroup_shrink_node(struct mem_cgroup *memcg,\nmm/internal.h-89-\t\t\t\t     gfp_t gfp_mask, bool noswap,\n--\nmm/memcontrol-v1.c=273=static int mem_cgroup_soft_reclaim(struct mem_cgroup *root_memcg,\n--\nmm/memcontrol-v1.c-312-\t\t}\nmm/memcontrol-v1.c:313:\t\ttotal += mem_cgroup_shrink_node(victim, gfp_mask, false,\nmm/memcontrol-v1.c-314-\t\t\t\t\tpgdat, \u0026nr_scanned);\n--\nmm/page_isolation.c=19=bool page_is_unmovable(struct zone *zone, struct page *page,\n--\nmm/page_isolation.c-114-\t * it.  But now, memory offline itself doesn't call\nmm/page_isolation.c:115:\t * shrink_node_slabs() and it still to be fixed.\nmm/page_isolation.c-116-\t */\n--\nmm/vmpressure.c=57=enum vmpressure_levels vmpressure_calc_level(unsigned long scanned,\n--\nmm/vmpressure.c-64-\t * reclaimed can be greater than scanned for things such as reclaimed\nmm/vmpressure.c:65:\t * slab pages. shrink_node() just adds reclaimed pages without a\nmm/vmpressure.c-66-\t * related increment to scanned pages.\n--\nmm/vmscan.c=1940=static void handle_reclaim_writeback(unsigned long nr_taken,\n--\nmm/vmscan.c-1978-/*\nmm/vmscan.c:1979: * shrink_inactive_list() is a helper for shrink_node().  It returns the number\nmm/vmscan.c-1980- * of reclaimed pages\n--\nmm/vmscan.c=5286=static void lru_gen_shrink_lruvec(struct lruvec *lruvec, struct scan_control *sc)\n--\nmm/vmscan.c-5306-\nmm/vmscan.c:5307:static void lru_gen_shrink_node(struct pglist_data *pgdat, struct scan_control *sc)\nmm/vmscan.c-5308-{\n--\nmm/vmscan.c=6035=static void lru_gen_shrink_lruvec(struct lruvec *lruvec, struct scan_control *sc)\n--\nmm/vmscan.c-6039-\nmm/vmscan.c:6040:static void lru_gen_shrink_node(struct pglist_data *pgdat, struct scan_control *sc)\nmm/vmscan.c-6041-{\n--\nmm/vmscan.c=6186=static inline bool should_continue_reclaim(struct pglist_data *pgdat,\n--\nmm/vmscan.c-6237-\nmm/vmscan.c:6238:static void shrink_node_memcgs(pg_data_t *pgdat, struct scan_control *sc)\nmm/vmscan.c-6239-{\n--\nmm/vmscan.c-6316-\nmm/vmscan.c:6317:static void shrink_node(pg_data_t *pgdat, struct scan_control *sc)\nmm/vmscan.c-6318-{\n--\nmm/vmscan.c-6324-\t\tmemset(\u0026sc-\u003enr, 0, sizeof(sc-\u003enr));\nmm/vmscan.c:6325:\t\tlru_gen_shrink_node(pgdat, sc);\nmm/vmscan.c-6326-\n--\nmm/vmscan.c-6341-\nmm/vmscan.c:6342:\tshrink_node_memcgs(pgdat, sc);\nmm/vmscan.c-6343-\n--\nmm/vmscan.c=6502=static void shrink_zones(struct zonelist *zonelist, struct scan_control *sc)\n--\nmm/vmscan.c-6580-\t\tlast_pgdat = zone-\u003ezone_pgdat;\nmm/vmscan.c:6581:\t\tshrink_node(zone-\u003ezone_pgdat, sc);\nmm/vmscan.c-6582-\t}\n--\nmm/vmscan.c=6847=unsigned long try_to_free_pages(struct zonelist *zonelist, int order,\n--\nmm/vmscan.c-6892-/* Only used by soft limit reclaim. Do not reuse for anything else. */\nmm/vmscan.c:6893:unsigned long mem_cgroup_shrink_node(struct mem_cgroup *memcg,\nmm/vmscan.c-6894-\t\t\t\t\t\tgfp_t gfp_mask, bool noswap,\n--\nmm/vmscan.c-6919-\t * here is not a good idea, since it limits the pages we can scan.\nmm/vmscan.c:6920:\t * if we don't reclaim here, the shrink_node from balance_pgdat\nmm/vmscan.c-6921-\t * will pick up pages from other mem cgroup's as well. We hack\n--\nmm/vmscan.c=7041=static bool pgdat_balanced(pg_data_t *pgdat, int order, int highest_zoneidx)\n--\nmm/vmscan.c-7065-\t\t * its own and needs kcompactd support. Once it's\nmm/vmscan.c:7066:\t\t * reclaimed a compaction gap, and kswapd_shrink_node\nmm/vmscan.c-7067-\t\t * has dropped order, simply ensure there are enough\n--\nmm/vmscan.c=7123=static bool prepare_kswapd_sleep(pg_data_t *pgdat, int order,\n--\nmm/vmscan.c-7161- */\nmm/vmscan.c:7162:static bool kswapd_shrink_node(pg_data_t *pgdat,\nmm/vmscan.c-7163-\t\t\t       struct scan_control *sc)\n--\nmm/vmscan.c-7178-\t */\nmm/vmscan.c:7179:\tshrink_node(pgdat, sc);\nmm/vmscan.c-7180-\n--\nmm/vmscan.c=7235=static int balance_pgdat(pg_data_t *pgdat, int order, int highest_zoneidx)\n--\nmm/vmscan.c-7344-\nmm/vmscan.c:7345:\t\t/* Call soft limit reclaim before calling shrink_node. */\nmm/vmscan.c-7346-\t\tsc.nr_scanned = 0;\n--\nmm/vmscan.c-7356-\t\t */\nmm/vmscan.c:7357:\t\tif (kswapd_shrink_node(pgdat, \u0026sc))\nmm/vmscan.c-7358-\t\t\traise_priority = false;\n--\nmm/vmscan.c=7911=static unsigned long __node_reclaim(struct pglist_data *pgdat,\n--\nmm/vmscan.c-7938-\t\tdo {\nmm/vmscan.c:7939:\t\t\tshrink_node(pgdat, sc);\nmm/vmscan.c-7940-\t\t} while (sc-\u003enr_reclaimed \u003c nr_pages \u0026\u0026 --sc-\u003epriority \u003e= 0);\n"
}

gemini-3.1-pro-preview

							input: 11478
							output: 21
							thoughts: 78

Okay, let's break this down.

**Memory Management Entry Points and Reclaim Logic**

Alright, so `try_to_free_pages` seems like the logical starting point for understanding how the kernel initiates page freeing. That's usually the best place to begin the analysis. It's the top level function, if I recall correctly. Then, `balance_pgdat` is the main loop for the kswapd daemon, that makes sense. It's the persistent process that constantly monitors and manages memory pressure across the system.

`__node_reclaim` sounds like the core logic for reclaiming memory at the NUMA node level. That's likely the function that's being called when kswapd, or other parts of the memory management system, need to free up memory from a specific node. And finally, `try_to_free_mem_cgroup_pages` is specifically for memory cgroup reclaim. That's targeted at memory control groups, handling their specific reclaim demands.

So, where do I start? Let's dive into `try_to_free_pages` and see how the page freeing process unfolds. That seems to be the logical entry point for the entire memory freeing process.

{
  "Expression": "try_to_free_pages"
}

{
  "Output": "fs/fuse/file.c=2351=static void fuse_vma_close(struct vm_area_struct *vma)\n--\nfs/fuse/file.c-2371- * - sync(2)\nfs/fuse/file.c:2372: * - try_to_free_pages() with order \u003e PAGE_ALLOC_COSTLY_ORDER\nfs/fuse/file.c-2373- */\n--\nmm/internal.h=69=unsigned long zone_reclaimable_pages(struct zone *zone);\nmm/internal.h:70:unsigned long try_to_free_pages(struct zonelist *zonelist, int order,\nmm/internal.h-71-\t\t\t\tgfp_t gfp_mask, const nodemask_t *mask);\n--\nmm/page_alloc.c=4496=__perform_reclaim(gfp_t gfp_mask, unsigned int order,\n--\nmm/page_alloc.c-4508-\nmm/page_alloc.c:4509:\tprogress = try_to_free_pages(ac-\u003ezonelist, order, gfp_mask,\nmm/page_alloc.c-4510-\t\t\t\t\t\t\t\tac-\u003enodemask);\n--\nmm/vmscan.c=6594=static void snapshot_refaults(struct mem_cgroup *target_memcg, pg_data_t *pgdat)\n--\nmm/vmscan.c-6624- */\nmm/vmscan.c:6625:static unsigned long do_try_to_free_pages(struct zonelist *zonelist,\nmm/vmscan.c-6626-\t\t\t\t\t  struct scan_control *sc)\n--\nmm/vmscan.c=6767=static bool throttle_direct_reclaim(gfp_t gfp_mask, struct zonelist *zonelist,\n--\nmm/vmscan.c-6846-\nmm/vmscan.c:6847:unsigned long try_to_free_pages(struct zonelist *zonelist, int order,\nmm/vmscan.c-6848-\t\t\t\tgfp_t gfp_mask, const nodemask_t *nodemask)\n--\nmm/vmscan.c-6881-\nmm/vmscan.c:6882:\tnr_reclaimed = do_try_to_free_pages(zonelist, \u0026sc);\nmm/vmscan.c-6883-\n--\nmm/vmscan.c=6933=unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *memcg,\n--\nmm/vmscan.c-6964-\nmm/vmscan.c:6965:\tnr_reclaimed = do_try_to_free_pages(zonelist, \u0026sc);\nmm/vmscan.c-6966-\n--\nmm/vmscan.c=7731=unsigned long shrink_all_memory(unsigned long nr_to_reclaim)\n--\nmm/vmscan.c-7750-\nmm/vmscan.c:7751:\tnr_reclaimed = do_try_to_free_pages(zonelist, \u0026sc);\nmm/vmscan.c-7752-\n"
}

gemini-3.1-pro-preview

							input: 12643
							output: 21
							thoughts: 267

**Analyzing Page Allocation and Memory Reclamation**

Okay, so `try_to_free_pages` gets called from `__perform_reclaim` within `mm/page_alloc.c`. This is the slow path for page allocation, which confirms its importance. Definitely a valid code path.

Let's revisit the modified functions. I see `try_to_inc_min_seq`, `scan_folios`, `isolate_folios`, `evict_folios`, and `should_run_aging`. They're all static, which limits their direct usefulness. I need to identify suitable non-static functions for `FocusSymbols`, though.

I've got `try_to_free_pages`, `try_to_free_mem_cgroup_pages`, `shrink_all_memory`, `balance_pgdat` (which is kswapd), and `mem_cgroup_shrink_node`. Hmm, `try_to_free_pages` is incredibly generic – it's the direct entry point for reclaim. While it's a hot-path function, it's perhaps *too* broad. I need something more specific.

I wonder if `lru_gen_shrink_lruvec` would be more targeted? But no, it's static. Let's dig deeper. I need to verify that there are *no* non-static `lru_gen_*` functions.

{
  "Expression": "^void lru_gen_"
}

{
  "Output": "include/linux/mm_types.h=1487=struct lru_gen_mm_list {\n--\ninclude/linux/mm_types.h-1497-\ninclude/linux/mm_types.h:1498:void lru_gen_add_mm(struct mm_struct *mm);\ninclude/linux/mm_types.h:1499:void lru_gen_del_mm(struct mm_struct *mm);\ninclude/linux/mm_types.h:1500:void lru_gen_migrate_mm(struct mm_struct *mm);\ninclude/linux/mm_types.h-1501-\n--\ninclude/linux/mmzone.h=677=struct lru_gen_memcg {\n--\ninclude/linux/mmzone.h-687-\ninclude/linux/mmzone.h:688:void lru_gen_init_pgdat(struct pglist_data *pgdat);\ninclude/linux/mmzone.h:689:void lru_gen_init_lruvec(struct lruvec *lruvec);\ninclude/linux/mmzone.h-690-bool lru_gen_look_around(struct page_vma_mapped_walk *pvmw, unsigned int nr);\ninclude/linux/mmzone.h-691-\ninclude/linux/mmzone.h:692:void lru_gen_init_memcg(struct mem_cgroup *memcg);\ninclude/linux/mmzone.h:693:void lru_gen_exit_memcg(struct mem_cgroup *memcg);\ninclude/linux/mmzone.h:694:void lru_gen_online_memcg(struct mem_cgroup *memcg);\ninclude/linux/mmzone.h:695:void lru_gen_offline_memcg(struct mem_cgroup *memcg);\ninclude/linux/mmzone.h:696:void lru_gen_release_memcg(struct mem_cgroup *memcg);\ninclude/linux/mmzone.h:697:void lru_gen_soft_reclaim(struct mem_cgroup *memcg, int nid);\ninclude/linux/mmzone.h-698-void max_lru_gen_memcg(struct mem_cgroup *memcg, int nid);\ninclude/linux/mmzone.h=699=bool recheck_lru_gen_max_memcg(struct mem_cgroup *memcg, int nid);\ninclude/linux/mmzone.h:700:void lru_gen_reparent_memcg(struct mem_cgroup *memcg, struct mem_cgroup *parent, int nid);\ninclude/linux/mmzone.h-701-\n--\ninclude/linux/mmzone.h=751=static inline\ninclude/linux/mmzone.h:752:void lru_gen_reparent_memcg(struct mem_cgroup *memcg, struct mem_cgroup *parent, int nid)\ninclude/linux/mmzone.h-753-{\n--\nmm/vmscan.c=2922=static struct mm_struct *get_next_mm(struct lru_gen_mm_walk *walk)\n--\nmm/vmscan.c-2940-\nmm/vmscan.c:2941:void lru_gen_add_mm(struct mm_struct *mm)\nmm/vmscan.c-2942-{\n--\nmm/vmscan.c-2967-\nmm/vmscan.c:2968:void lru_gen_del_mm(struct mm_struct *mm)\nmm/vmscan.c-2969-{\n--\nmm/vmscan.c-3007-#ifdef CONFIG_MEMCG\nmm/vmscan.c:3008:void lru_gen_migrate_mm(struct mm_struct *mm)\nmm/vmscan.c-3009-{\n--\nmm/vmscan.c=4371=static void lru_gen_rotate_memcg(struct lruvec *lruvec, int op)\n--\nmm/vmscan.c-4418-\nmm/vmscan.c:4419:void lru_gen_online_memcg(struct mem_cgroup *memcg)\nmm/vmscan.c-4420-{\n--\nmm/vmscan.c-4443-\nmm/vmscan.c:4444:void lru_gen_offline_memcg(struct mem_cgroup *memcg)\nmm/vmscan.c-4445-{\n--\nmm/vmscan.c-4454-\nmm/vmscan.c:4455:void lru_gen_release_memcg(struct mem_cgroup *memcg)\nmm/vmscan.c-4456-{\n--\nmm/vmscan.c-4480-\nmm/vmscan.c:4481:void lru_gen_soft_reclaim(struct mem_cgroup *memcg, int nid)\nmm/vmscan.c-4482-{\n--\nmm/vmscan.c=4578=static void __lru_gen_reparent_memcg(struct lruvec *child_lruvec, struct lruvec *parent_lruvec,\n--\nmm/vmscan.c-4608-\nmm/vmscan.c:4609:void lru_gen_reparent_memcg(struct mem_cgroup *memcg, struct mem_cgroup *parent, int nid)\nmm/vmscan.c-4610-{\n--\nmm/vmscan.c=5926=static const struct file_operations lru_gen_ro_fops = {\n--\nmm/vmscan.c-5936-\nmm/vmscan.c:5937:void lru_gen_init_pgdat(struct pglist_data *pgdat)\nmm/vmscan.c-5938-{\n--\nmm/vmscan.c-5948-\nmm/vmscan.c:5949:void lru_gen_init_lruvec(struct lruvec *lruvec)\nmm/vmscan.c-5950-{\n--\nmm/vmscan.c-5970-\nmm/vmscan.c:5971:void lru_gen_init_memcg(struct mem_cgroup *memcg)\nmm/vmscan.c-5972-{\n--\nmm/vmscan.c-5981-\nmm/vmscan.c:5982:void lru_gen_exit_memcg(struct mem_cgroup *memcg)\nmm/vmscan.c-5983-{\n--\ntools/testing/selftests/kvm/include/lru_gen_util.h=37=struct memcg_stats {\n--\ntools/testing/selftests/kvm/include/lru_gen_util.h-42-\ntools/testing/selftests/kvm/include/lru_gen_util.h:43:void lru_gen_read_memcg_stats(struct memcg_stats *stats, const char *memcg);\ntools/testing/selftests/kvm/include/lru_gen_util.h-44-long lru_gen_sum_memcg_stats(const struct memcg_stats *stats);\ntools/testing/selftests/kvm/include/lru_gen_util.h=45=long lru_gen_sum_memcg_stats_for_gen(int gen, const struct memcg_stats *stats);\ntools/testing/selftests/kvm/include/lru_gen_util.h:46:void lru_gen_do_aging(struct memcg_stats *stats, const char *memcg);\ntools/testing/selftests/kvm/include/lru_gen_util.h-47-int lru_gen_find_generation(const struct memcg_stats *stats,\n--\ntools/testing/selftests/kvm/lib/lru_gen_util.c=181=static void print_memcg_stats(const struct memcg_stats *stats, const char *name)\n--\ntools/testing/selftests/kvm/lib/lru_gen_util.c-200-/* Re-read lru_gen debugfs information for @memcg into @stats. */\ntools/testing/selftests/kvm/lib/lru_gen_util.c:201:void lru_gen_read_memcg_stats(struct memcg_stats *stats, const char *memcg)\ntools/testing/selftests/kvm/lib/lru_gen_util.c-202-{\n--\ntools/testing/selftests/kvm/lib/lru_gen_util.c=282=static void run_aging_impl(unsigned long memcg_id, int node_id, int max_gen)\n--\ntools/testing/selftests/kvm/lib/lru_gen_util.c-301-\ntools/testing/selftests/kvm/lib/lru_gen_util.c:302:void lru_gen_do_aging(struct memcg_stats *stats, const char *memcg)\ntools/testing/selftests/kvm/lib/lru_gen_util.c-303-{\n"
}

gemini-3.1-pro-preview

							input: 15553
							output: 22
							thoughts: 91

**Analyzing Memory Reclaim Functions**

Okay, so I'm looking at memory reclaim functions, and immediately I see that `lru_gen_soft_reclaim` isn't static and calls into MGLRU reclaim. That's a key observation. Now, I see that `shrink_node` *is* static, but then `mem_cgroup_shrink_node` is *not* static. Hmmm, that's interesting. Perhaps `mem_cgroup_shrink_node` is a more relevant point to focus on, as a non-static symbol is often a more important entry point to understand. Let's dig deeper. I'm going to check the implementation of `mem_cgroup_shrink_node` to understand what's happening. I'll find it in `mm/vmscan.c`.

{
  "Expression": "mem_cgroup_shrink_node"
}

{
  "Output": "mm/internal.h=83=unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *memcg,\n--\nmm/internal.h-87-\t\t\t\t\t   int *swappiness);\nmm/internal.h:88:unsigned long mem_cgroup_shrink_node(struct mem_cgroup *memcg,\nmm/internal.h-89-\t\t\t\t     gfp_t gfp_mask, bool noswap,\n--\nmm/memcontrol-v1.c=273=static int mem_cgroup_soft_reclaim(struct mem_cgroup *root_memcg,\n--\nmm/memcontrol-v1.c-312-\t\t}\nmm/memcontrol-v1.c:313:\t\ttotal += mem_cgroup_shrink_node(victim, gfp_mask, false,\nmm/memcontrol-v1.c-314-\t\t\t\t\tpgdat, \u0026nr_scanned);\n--\nmm/vmscan.c=6847=unsigned long try_to_free_pages(struct zonelist *zonelist, int order,\n--\nmm/vmscan.c-6892-/* Only used by soft limit reclaim. Do not reuse for anything else. */\nmm/vmscan.c:6893:unsigned long mem_cgroup_shrink_node(struct mem_cgroup *memcg,\nmm/vmscan.c-6894-\t\t\t\t\t\tgfp_t gfp_mask, bool noswap,\n"
}

gemini-3.1-pro-preview

							input: 16212
							output: 26
							thoughts: 73

**Fuzzing Memory Reclaim: A Promising Entry Point**

Okay, so I'm looking at how to effectively fuzz memory reclaim in the kernel, and I've identified a promising entry point. I see that the function `try_to_free_mem_cgroup_pages` is called specifically by `memory_max_write` and `memory_high_write` within `mm/memcontrol.c`. This is quite interesting. The fact that it's tied to memory limits being reached, either maximum or high thresholds, suggests it's a good spot to probe the reclaim mechanisms under stress. It makes logical sense to start here because this function would be responsible for attempting to free memory when the system is under pressure. Therefore, I should carefully analyze `try_to_free_mem_cgroup_pages` to understand its internal workings. It appears to be an ideal candidate for fuzzing, given its context. This is where I'll focus my initial efforts.

{
  "Expression": "try_to_free_mem_cgroup_pages"
}

{
  "Output": "mm/internal.h=72=unsigned long lruvec_lru_size(struct lruvec *lruvec, enum lru_list lru,\n--\nmm/internal.h-82-\nmm/internal.h:83:unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *memcg,\nmm/internal.h-84-\t\t\t\t\t   unsigned long nr_pages,\n--\nmm/memcontrol-v1.c=1772=static int mem_cgroup_resize_max(struct mem_cgroup *memcg,\n--\nmm/memcontrol-v1.c-1816-\nmm/memcontrol-v1.c:1817:\t\tif (!try_to_free_mem_cgroup_pages(memcg, 1, GFP_KERNEL,\nmm/memcontrol-v1.c-1818-\t\t\t\tmemsw ? 0 : MEMCG_RECLAIM_MAY_SWAP, NULL)) {\n--\nmm/memcontrol-v1.c=1835=static int mem_cgroup_force_empty(struct mem_cgroup *memcg)\n--\nmm/memcontrol-v1.c-1852-\nmm/memcontrol-v1.c:1853:\t\tif (!try_to_free_mem_cgroup_pages(memcg, 1, GFP_KERNEL,\nmm/memcontrol-v1.c-1854-\t\t\t\t\t\t  MEMCG_RECLAIM_MAY_SWAP, NULL))\n--\nmm/memcontrol.c=2373=static unsigned long reclaim_high(struct mem_cgroup *memcg,\n--\nmm/memcontrol.c-2388-\t\tpsi_memstall_enter(\u0026pflags);\nmm/memcontrol.c:2389:\t\tnr_reclaimed += try_to_free_mem_cgroup_pages(memcg, nr_pages,\nmm/memcontrol.c-2390-\t\t\t\t\t\t\tgfp_mask,\n--\nmm/memcontrol.c=2640=static int try_charge_memcg(struct mem_cgroup *memcg, gfp_t gfp_mask,\n--\nmm/memcontrol.c-2712-\tpsi_memstall_enter(\u0026pflags);\nmm/memcontrol.c:2713:\tnr_reclaimed = try_to_free_mem_cgroup_pages(mem_over_limit, nr_pages,\nmm/memcontrol.c-2714-\t\t\t\t\t\t    gfp_mask, reclaim_options, NULL);\n--\nmm/memcontrol.c=4830=static ssize_t memory_high_write(struct kernfs_open_file *of,\n--\nmm/memcontrol.c-4871-\nmm/memcontrol.c:4872:\t\treclaimed = try_to_free_mem_cgroup_pages(memcg, nr_pages - high,\nmm/memcontrol.c-4873-\t\t\t\t\tGFP_KERNEL, MEMCG_RECLAIM_MAY_SWAP, NULL);\n--\nmm/memcontrol.c=4889=static ssize_t memory_max_write(struct kernfs_open_file *of,\n--\nmm/memcontrol.c-4930-\t\tif (nr_reclaims) {\nmm/memcontrol.c:4931:\t\t\tif (!try_to_free_mem_cgroup_pages(memcg, nr_pages - max,\nmm/memcontrol.c-4932-\t\t\t\t\tGFP_KERNEL, MEMCG_RECLAIM_MAY_SWAP, NULL))\n--\nmm/vmscan.c=6893=unsigned long mem_cgroup_shrink_node(struct mem_cgroup *memcg,\n--\nmm/vmscan.c-6932-\nmm/vmscan.c:6933:unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *memcg,\nmm/vmscan.c-6934-\t\t\t\t\t   unsigned long nr_pages,\n--\nmm/vmscan.c-6973-#else\nmm/vmscan.c:6974:unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *memcg,\nmm/vmscan.c-6975-\t\t\t\t\t   unsigned long nr_pages,\n--\nmm/vmscan.c=8036=int user_proactive_reclaim(char *buf,\n--\nmm/vmscan.c-8107-\t\t\t\t\t  MEMCG_RECLAIM_PROACTIVE;\nmm/vmscan.c:8108:\t\t\treclaimed = try_to_free_mem_cgroup_pages(memcg,\nmm/vmscan.c-8109-\t\t\t\t\t\t batch_size, gfp_mask,\n"
}

gemini-3.1-pro-preview

							input: 17687
							output: 21
							thoughts: 66

Okay, let's break this down.

**Diving into Cgroup Memory Management**

`try_to_free_mem_cgroup_pages`... now *that's* a function name that grabs my attention. It clearly targets memory pressure within a cgroup. I like that. But what else is in play here? Ah, *that's* the beauty of cgroup v2, there is `user_proactive_reclaim`. That's invoked when we write to `memory.reclaim`, which is the user interface to trigger memory reclamation.

I need to dive into `user_proactive_reclaim`. Time to dig in and see how it works!

{
  "Expression": "user_proactive_reclaim"
}

{
  "Output": "mm/internal.h=703=extern void reclaim_throttle(pg_data_t *pgdat, enum vmscan_throttle_state reason);\nmm/internal.h:704:int user_proactive_reclaim(char *buf,\nmm/internal.h-705-\t\t\t   struct mem_cgroup *memcg, pg_data_t *pgdat);\n--\nmm/memcontrol.c=5065=static ssize_t memory_reclaim(struct kernfs_open_file *of, char *buf,\n--\nmm/memcontrol.c-5070-\nmm/memcontrol.c:5071:\tret = user_proactive_reclaim(buf, memcg, NULL);\nmm/memcontrol.c-5072-\tif (ret)\n--\nmm/vmscan.c=8030=static const match_table_t tokens = {\n--\nmm/vmscan.c-8035-\nmm/vmscan.c:8036:int user_proactive_reclaim(char *buf,\nmm/vmscan.c-8037-\t\t\t   struct mem_cgroup *memcg, pg_data_t *pgdat)\n--\nmm/vmscan.c=8189=static ssize_t reclaim_store(struct device *dev,\n--\nmm/vmscan.c-8194-\nmm/vmscan.c:8195:\tret = user_proactive_reclaim((char *)buf, NULL, NODE_DATA(nid));\nmm/vmscan.c-8196-\treturn ret ? ret : count;\n"
}

gemini-3.1-pro-preview

							input: 18324
							output: 17
							thoughts: 70

**Exploring MGLRU Usability**

Okay, so `user_proactive_reclaim` looks like a solid starting point for focusing our efforts. I need to investigate further - are there any other functions specifically within MGLRU that could be invoked from userspace? Let's dig deeper. The `run_cmd` function in `mm/vmscan.c` is called from debugfs, which is interesting. Time to delve into `run_cmd` and see what that function does.

{
  "Expression": "run_cmd"
}

{
  "Output": "\nFull output is too long, showing 500 out of 8454 lines.\nUse more precise expression if possible.\n\narch/powerpc/boot/wrapper=68=usage() {\n--\narch/powerpc/boot/wrapper-75-\narch/powerpc/boot/wrapper:76:run_cmd() {\narch/powerpc/boot/wrapper-77-    if [ \"$V\" = 1 ]; then\n--\narch/powerpc/boot/wrapper=530=ps3)\n--\narch/powerpc/boot/wrapper-554-\narch/powerpc/boot/wrapper:555:    run_cmd dd if=\"$ofile.bin\" of=\"$ofile.bin\" conv=notrunc   \\\narch/powerpc/boot/wrapper-556-        skip=$overlay_dest seek=$system_reset_kernel          \\\n--\narch/powerpc/boot/wrapper-558-\narch/powerpc/boot/wrapper:559:    run_cmd dd if=\"$ofile.bin\" of=\"$ofile.bin\" conv=notrunc   \\\narch/powerpc/boot/wrapper-560-        skip=$system_reset_overlay seek=$overlay_dest         \\\n--\ndrivers/crypto/ccp/ccp-dev.c=434=int ccp_cmd_queue_thread(void *data)\n--\ndrivers/crypto/ccp/ccp-dev.c-455-\t\t/* Execute the command */\ndrivers/crypto/ccp/ccp-dev.c:456:\t\tcmd-\u003eret = ccp_run_cmd(cmd_q, cmd);\ndrivers/crypto/ccp/ccp-dev.c-457-\n--\ndrivers/crypto/ccp/ccp-dev.h=639=int ccp_trng_read(struct hwrng *rng, void *data, size_t max, bool wait);\ndrivers/crypto/ccp/ccp-dev.h-640-\ndrivers/crypto/ccp/ccp-dev.h:641:int ccp_run_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd);\ndrivers/crypto/ccp/ccp-dev.h-642-\n--\ndrivers/crypto/ccp/ccp-ops.c=2450=ccp_run_ecc_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)\n--\ndrivers/crypto/ccp/ccp-ops.c-2475-\ndrivers/crypto/ccp/ccp-ops.c:2476:int ccp_run_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)\ndrivers/crypto/ccp/ccp-ops.c-2477-{\n--\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c=227=struct g2d_runqueue_node {\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-228-\tstruct list_head\tlist;\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c:229:\tstruct list_head\trun_cmdlist;\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-230-\tstruct list_head\tevent_list;\n--\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c=800=static void g2d_dma_start(struct g2d_data *g2d,\n--\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-803-\tstruct g2d_cmdlist_node *node =\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c:804:\t\t\t\tlist_first_entry(\u0026runqueue_node-\u003erun_cmdlist,\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-805-\t\t\t\t\t\tstruct g2d_cmdlist_node, list);\n--\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c=825=static void g2d_free_runqueue_node(struct g2d_data *g2d,\n--\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-831-\t/*\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c:832:\t * commands in run_cmdlist have been completed so unmap all gem\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-833-\t * objects in each command node so that they are unreferenced.\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-834-\t */\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c:835:\tlist_for_each_entry(node, \u0026runqueue_node-\u003erun_cmdlist, list)\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-836-\t\tg2d_unmap_cmdlist_gem(g2d, node, runqueue_node-\u003efilp);\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c:837:\tlist_splice_tail_init(\u0026runqueue_node-\u003erun_cmdlist, \u0026g2d-\u003efree_cmdlist);\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-838-\tmutex_unlock(\u0026g2d-\u003ecmdlist_mutex);\n--\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c=1299=int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data,\n--\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-1306-\tstruct g2d_runqueue_node *runqueue_node;\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c:1307:\tstruct list_head *run_cmdlist;\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-1308-\tstruct list_head *event_list;\n--\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-1313-\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c:1314:\trun_cmdlist = \u0026runqueue_node-\u003erun_cmdlist;\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-1315-\tevent_list = \u0026runqueue_node-\u003eevent_list;\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c:1316:\tINIT_LIST_HEAD(run_cmdlist);\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-1317-\tINIT_LIST_HEAD(event_list);\n--\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-1320-\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c:1321:\tlist_splice_init(\u0026file_priv-\u003einuse_cmdlist, run_cmdlist);\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-1322-\tlist_splice_init(\u0026file_priv-\u003eevent_list, event_list);\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-1323-\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c:1324:\tif (list_empty(run_cmdlist)) {\ndrivers/gpu/drm/exynos/exynos_drm_g2d.c-1325-\t\tdev_err(g2d-\u003edev, \"there is no inuse cmdlist\\n\");\n--\ndrivers/media/platform/chips-media/coda/coda-bit.c=939=int coda_check_firmware(struct coda_dev *dev)\n--\ndrivers/media/platform/chips-media/coda/coda-bit.c-960-\t\tret = -EIO;\ndrivers/media/platform/chips-media/coda/coda-bit.c:961:\t\tgoto err_run_cmd;\ndrivers/media/platform/chips-media/coda/coda-bit.c-962-\t}\n--\ndrivers/media/platform/chips-media/coda/coda-bit.c-1001-\ndrivers/media/platform/chips-media/coda/coda-bit.c:1002:err_run_cmd:\ndrivers/media/platform/chips-media/coda/coda-bit.c-1003-\tclk_disable_unprepare(dev-\u003eclk_ahb);\n--\ndrivers/net/mdio/mdio-realtek-rtl9300.c=173=static struct otto_emdio_priv *otto_emdio_bus_to_priv(struct mii_bus *bus)\n--\ndrivers/net/mdio/mdio-realtek-rtl9300.c-179-\ndrivers/net/mdio/mdio-realtek-rtl9300.c:180:static int otto_emdio_run_cmd(struct mii_bus *bus, u32 cmd,\ndrivers/net/mdio/mdio-realtek-rtl9300.c-181-\t\t\t      struct otto_emdio_cmd_regs *cmd_data)\n--\ndrivers/net/mdio/mdio-realtek-rtl9300.c=237=static int otto_emdio_read_cmd(struct mii_bus *bus, u32 cmd,\n--\ndrivers/net/mdio/mdio-realtek-rtl9300.c-243-\tlockdep_assert_held(\u0026priv-\u003elock);\ndrivers/net/mdio/mdio-realtek-rtl9300.c:244:\tret = otto_emdio_run_cmd(bus, cmd | priv-\u003einfo-\u003ecmd_read, cmd_data);\ndrivers/net/mdio/mdio-realtek-rtl9300.c-245-\tif (ret)\n--\ndrivers/net/mdio/mdio-realtek-rtl9300.c=257=static int otto_emdio_write_cmd(struct mii_bus *bus, u32 cmd,\n--\ndrivers/net/mdio/mdio-realtek-rtl9300.c-263-\ndrivers/net/mdio/mdio-realtek-rtl9300.c:264:\treturn otto_emdio_run_cmd(bus, cmd | priv-\u003einfo-\u003ecmd_write, cmd_data);\ndrivers/net/mdio/mdio-realtek-rtl9300.c-265-}\n--\nkernel/reboot.c=840=static const char reboot_cmd[] = \"/sbin/reboot\";\nkernel/reboot.c-841-\nkernel/reboot.c:842:static int run_cmd(const char *cmd)\nkernel/reboot.c-843-{\n--\nkernel/reboot.c=862=static int __orderly_reboot(void)\n--\nkernel/reboot.c-865-\nkernel/reboot.c:866:\tret = run_cmd(reboot_cmd);\nkernel/reboot.c-867-\n--\nkernel/reboot.c=877=static int __orderly_poweroff(bool force)\n--\nkernel/reboot.c-880-\nkernel/reboot.c:881:\tret = run_cmd(poweroff_cmd);\nkernel/reboot.c-882-\n--\nmm/vmscan.c=5757=static int run_eviction(struct lruvec *lruvec, unsigned long seq, struct scan_control *sc,\n--\nmm/vmscan.c-5786-\nmm/vmscan.c:5787:static int run_cmd(char cmd, u64 memcg_id, int nid, unsigned long seq,\nmm/vmscan.c-5788-\t\t   struct scan_control *sc, int swappiness, unsigned long opt)\n--\nmm/vmscan.c=5829=static ssize_t lru_gen_seq_write(struct file *file, const char __user *src,\n--\nmm/vmscan.c-5897-\nmm/vmscan.c:5898:\t\terr = run_cmd(cmd, memcg_id, nid, seq, \u0026sc, swappiness, opt);\nmm/vmscan.c-5899-\t\tif (err)\n--\nscripts/coccicheck=135=fi\nscripts/coccicheck-136-\nscripts/coccicheck:137:run_cmd_parmap() {\nscripts/coccicheck-138-\tif [ $VERBOSE -ne 0 ] ; then\n--\nscripts/coccicheck-155-\nscripts/coccicheck:156:run_cmd_old() {\nscripts/coccicheck-157-\tlocal i\n--\nscripts/coccicheck-170-\nscripts/coccicheck:171:run_cmd() {\nscripts/coccicheck-172-\tif [ \"$USE_JOBS\" = \"yes\" ]; then\nscripts/coccicheck:173:\t\trun_cmd_parmap $@\nscripts/coccicheck-174-\telse\nscripts/coccicheck:175:\t\trun_cmd_old $@\nscripts/coccicheck-176-\tfi\n--\nscripts/coccicheck=191=coccinelle () {\n--\nscripts/coccicheck-242-    if [ \"$MODE\" = \"chain\" ] ; then\nscripts/coccicheck:243:\trun_cmd $SPATCH -D patch   \\\nscripts/coccicheck-244-\t\t$FLAGS --cocci-file $COCCI $OPT $OPTIONS               || \\\nscripts/coccicheck:245:\trun_cmd $SPATCH -D report  \\\nscripts/coccicheck-246-\t\t$FLAGS --cocci-file $COCCI $OPT $OPTIONS --no-show-diff || \\\nscripts/coccicheck:247:\trun_cmd $SPATCH -D context \\\nscripts/coccicheck-248-\t\t$FLAGS --cocci-file $COCCI $OPT $OPTIONS               || \\\nscripts/coccicheck:249:\trun_cmd $SPATCH -D org     \\\nscripts/coccicheck-250-\t\t$FLAGS --cocci-file $COCCI $OPT $OPTIONS --no-show-diff || exit 1\nscripts/coccicheck-251-    elif [ \"$MODE\" = \"rep+ctxt\" ] ; then\nscripts/coccicheck:252:\trun_cmd $SPATCH -D report  \\\nscripts/coccicheck-253-\t\t$FLAGS --cocci-file $COCCI $OPT $OPTIONS --no-show-diff \u0026\u0026 \\\nscripts/coccicheck:254:\trun_cmd $SPATCH -D context \\\nscripts/coccicheck-255-\t\t$FLAGS --cocci-file $COCCI $OPT $OPTIONS || exit 1\nscripts/coccicheck-256-    else\nscripts/coccicheck:257:\trun_cmd $SPATCH -D $MODE   $FLAGS --cocci-file $COCCI $OPT $OPTIONS || exit 1\nscripts/coccicheck-258-    fi\n--\ntools/bootconfig/scripts/bconf2ftrace.sh=39=fi\ntools/bootconfig/scripts/bconf2ftrace.sh-40-\ntools/bootconfig/scripts/bconf2ftrace.sh:41:run_cmd() { # command\ntools/bootconfig/scripts/bconf2ftrace.sh-42-\techo \"$*\"\n--\ntools/bootconfig/scripts/bconf2ftrace.sh=77=set_value_of() { # key file\n--\ntools/bootconfig/scripts/bconf2ftrace.sh-79-\t\tval=`xbc_get_val $1 1`\ntools/bootconfig/scripts/bconf2ftrace.sh:80:\t\trun_cmd \"echo '$val' \u003e\u003e $2\"\ntools/bootconfig/scripts/bconf2ftrace.sh-81-\tfi\n--\ntools/bootconfig/scripts/bconf2ftrace.sh=84=set_array_of() { # key file\n--\ntools/bootconfig/scripts/bconf2ftrace.sh-86-\t\txbc_get_val $1 | while read line; do\ntools/bootconfig/scripts/bconf2ftrace.sh:87:\t\t\trun_cmd \"echo '$line' \u003e\u003e $2\"\ntools/bootconfig/scripts/bconf2ftrace.sh-88-\t\tdone\n--\ntools/bootconfig/scripts/bconf2ftrace.sh=170=setup_one_histogram() { # prefix trigger-file\ntools/bootconfig/scripts/bconf2ftrace.sh:171:\trun_cmd \"echo '`print_one_histogram ${1}`' \u003e\u003e ${2}\"\ntools/bootconfig/scripts/bconf2ftrace.sh-172-}\n--\ntools/bootconfig/scripts/bconf2ftrace.sh=183=setup_event() { # prefix group event [instance]\n--\ntools/bootconfig/scripts/bconf2ftrace.sh-191-\tif [ \"$3\" = \"enable\" ]; then\ntools/bootconfig/scripts/bconf2ftrace.sh:192:\t\trun_cmd \"echo 1 \u003e ${eventdir}\"\ntools/bootconfig/scripts/bconf2ftrace.sh-193-\t\treturn\n--\ntools/bootconfig/scripts/bconf2ftrace.sh-198-\t\txbc_get_val ${branch}.probes | while read line; do\ntools/bootconfig/scripts/bconf2ftrace.sh:199:\t\t\trun_cmd \"echo 'p:kprobes/$3 $line' \u003e\u003e $TRACEFS/kprobe_events\"\ntools/bootconfig/scripts/bconf2ftrace.sh-200-\t\tdone\n--\ntools/bootconfig/scripts/bconf2ftrace.sh-202-\tsynthetic)\ntools/bootconfig/scripts/bconf2ftrace.sh:203:\t\trun_cmd \"echo '`compose_synth $3 ${branch}.fields`' \u003e\u003e $TRACEFS/synthetic_events\"\ntools/bootconfig/scripts/bconf2ftrace.sh-204-\t\t;;\n--\ntools/bootconfig/scripts/bconf2ftrace.sh-212-\tif xbc_has_key ${branch}.enable; then\ntools/bootconfig/scripts/bconf2ftrace.sh:213:\t\trun_cmd \"echo 1 \u003e ${eventdir}/enable\"\ntools/bootconfig/scripts/bconf2ftrace.sh-214-\tfi\n--\ntools/bootconfig/scripts/bconf2ftrace.sh=217=setup_events() { # prefix(\"ftrace\" or \"ftrace.instance.INSTANCE\") [instance]\n--\ntools/bootconfig/scripts/bconf2ftrace.sh-225-\t\tif [ \"$2\" ]; then\ntools/bootconfig/scripts/bconf2ftrace.sh:226:\t\t\trun_cmd \"echo 1 \u003e $TRACEFS/instances/$2/events/enable\"\ntools/bootconfig/scripts/bconf2ftrace.sh-227-\t\telse\ntools/bootconfig/scripts/bconf2ftrace.sh:228:\t\t\trun_cmd \"echo 1 \u003e $TRACEFS/events/enable\"\ntools/bootconfig/scripts/bconf2ftrace.sh-229-\t\tfi\n--\ntools/bootconfig/scripts/bconf2ftrace.sh=244=setup_instance() { # [instance]\n--\ntools/bootconfig/scripts/bconf2ftrace.sh-263-\tif xbc_has_key ${instance}.alloc_snapshot; then\ntools/bootconfig/scripts/bconf2ftrace.sh:264:\t\trun_cmd \"echo 1 \u003e ${instancedir}/snapshot\"\ntools/bootconfig/scripts/bconf2ftrace.sh-265-\tfi\n--\ntools/bootconfig/scripts/bconf2ftrace.sh-269-\t\tsize=`eval size2kb $size`\ntools/bootconfig/scripts/bconf2ftrace.sh:270:\t\trun_cmd \"echo $size \u003e\u003e ${instancedir}/buffer_size_kb\"\ntools/bootconfig/scripts/bconf2ftrace.sh-271-\tfi\n--\ntools/bootconfig/scripts/bconf2ftrace.sh=278=if xbc_has_key \"kernel.dump_on_oops\"; then\n--\ntools/bootconfig/scripts/bconf2ftrace.sh-280-\t[ \"$dump_mode\" ] \u0026\u0026 dump_mode=`eval echo $dump_mode` || dump_mode=1\ntools/bootconfig/scripts/bconf2ftrace.sh:281:\trun_cmd \"echo \\\"$dump_mode\\\" \u003e /proc/sys/kernel/ftrace_dump_on_oops\"\ntools/bootconfig/scripts/bconf2ftrace.sh-282-fi\n--\ntools/bootconfig/scripts/bconf2ftrace.sh=295=if xbc_has_branch \"ftrace.instance\"; then\ntools/bootconfig/scripts/bconf2ftrace.sh-296-\tfor i in `xbc_subkeys \"ftrace.instance\" 1`; do\ntools/bootconfig/scripts/bconf2ftrace.sh:297:\t\trun_cmd \"mkdir -p $TRACEFS/instances/$i\"\ntools/bootconfig/scripts/bconf2ftrace.sh-298-\t\tsetup_instance $i\n--\ntools/perf/tests/shell/lib/attr.py=147=class Test(object):\n--\ntools/perf/tests/shell/lib/attr.py-281-\ntools/perf/tests/shell/lib/attr.py:282:    def run_cmd(self, tempdir):\ntools/perf/tests/shell/lib/attr.py-283-        junk1, junk2, junk3, junk4, myarch = (os.uname())\n--\ntools/perf/tests/shell/lib/attr.py-378-            # run the test script\ntools/perf/tests/shell/lib/attr.py:379:            self.run_cmd(tempdir);\ntools/perf/tests/shell/lib/attr.py-380-\n--\ntools/testing/kunit/run_checks.py=36=def main(argv: Sequence[str]) -\u003e None:\n--\ntools/testing/kunit/run_checks.py-45-\t\t\tcontinue\ntools/testing/kunit/run_checks.py:46:\t\tf = executor.submit(run_cmd, argv)\ntools/testing/kunit/run_checks.py-47-\t\tfuture_to_name[f] = name\n--\ntools/testing/kunit/run_checks.py-75-\ntools/testing/kunit/run_checks.py:76:def run_cmd(argv: Sequence[str]) -\u003e None:\ntools/testing/kunit/run_checks.py-77-\tsubprocess.check_output(argv, stderr=subprocess.STDOUT, cwd=ABS_TOOL_PATH, timeout=TIMEOUT)\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c=25=struct verity_info {\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-36-/* Run a command and optionally capture the first line of stdout. */\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:37:static int run_cmd(const char *cmd, char *out, size_t out_sz)\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-38-{\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c=57=static bool has_prerequisites(void)\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-63-\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:64:\tif (run_cmd(\"modprobe loop 2\u003e/dev/null\", NULL, 0) \u0026\u0026\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:65:\t    run_cmd(\"ls /dev/loop-control 2\u003e/dev/null\", NULL, 0)) {\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-66-\t\tprintf(\"SKIP: no loop device support\\n\");\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-69-\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:70:\tif (run_cmd(\"modprobe dm-verity 2\u003e/dev/null\", NULL, 0) \u0026\u0026\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:71:\t    run_cmd(\"dmsetup targets 2\u003e/dev/null | grep -q verity\", NULL, 0)) {\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-72-\t\tprintf(\"SKIP: dm-verity module not available\\n\");\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-75-\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:76:\tif (run_cmd(\"which veritysetup \u003e/dev/null 2\u003e\u00261\", NULL, 0)) {\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-77-\t\tprintf(\"SKIP: veritysetup not found\\n\");\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c=84=void test_lsm_bdev(void)\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-105-\tsnprintf(cmd, sizeof(cmd), \"dmsetup remove %s 2\u003e/dev/null\", DM_NAME);\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:106:\trun_cmd(cmd, NULL, 0);\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-107-\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-132-\t\t \"losetup --find --show %s 2\u003e/dev/null\", data_img);\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:133:\tif (!ASSERT_OK(run_cmd(cmd, data_loop, sizeof(data_loop)),\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-134-\t\t       \"losetup data\"))\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-138-\t\t \"losetup --find --show %s 2\u003e/dev/null\", hash_img);\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:139:\tif (!ASSERT_OK(run_cmd(cmd, hash_loop, sizeof(hash_loop)),\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-140-\t\t       \"losetup hash\"))\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-147-\t\t data_loop, hash_loop);\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:148:\tif (!ASSERT_OK(run_cmd(cmd, roothash, sizeof(roothash)),\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-149-\t\t       \"veritysetup format\"))\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-167-\t\t data_loop, DM_NAME, hash_loop, roothash);\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:168:\tif (!ASSERT_OK(run_cmd(cmd, NULL, 0), \"veritysetup open\"))\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-169-\t\tgoto teardown;\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-198-\tsnprintf(cmd, sizeof(cmd), \"dmsetup remove %s 2\u003e/dev/null\", DM_NAME);\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:199:\trun_cmd(cmd, NULL, 0);\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-200-\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-204-\t\t\t data_loop);\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:205:\t\trun_cmd(cmd, NULL, 0);\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-206-\t}\n--\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-209-\t\t\t hash_loop);\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c:210:\t\trun_cmd(cmd, NULL, 0);\ntools/testing/selftests/bpf/prog_tests/lsm_bdev.c-211-\t}\n--\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py=97=class RecordValuePicker:\n--\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py-120-\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py:121:def run_cmd(cmd, json=False):\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py-122-    out = subprocess.check_output(cmd, shell=True)\n--\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py=128=def run_json_cmd(cmd):\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py:129:    return run_cmd(cmd, json=True)\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py-130-\n--\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py=172=class Pool(CommonItem):\n--\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py-175-    def dl_set(self, dlname, size, thtype):\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py:176:        run_cmd(\"devlink sb pool set {} sb {} pool {} size {} thtype {}\".format(dlname, self[\"sb\"],\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py-177-                                                                                self[\"pool\"],\n--\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py=230=class TcBind(CommonItem):\n--\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py-237-    def dl_set(self, pool, th):\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py:238:        run_cmd(\"devlink sb tc bind set {} sb {} tc {} type {} pool {} th {}\".format(self[\"dlportname\"],\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py-239-                                                                                     self[\"sb\"],\n--\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py=304=class PortPool(CommonItem):\n--\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py-311-    def dl_set(self, th):\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py:312:        run_cmd(\"devlink sb port pool set {} sb {} pool {} th {}\".format(self[\"dlportname\"],\ntools/testing/selftests/drivers/net/mlxsw/sharedbuffer_configuration.py-313-                                                                         self[\"sb\"],\n--\ntools/testing/selftests/net/fcnal-test.sh=195=set_ping_group()\n--\ntools/testing/selftests/net/fcnal-test.sh-203-\ntools/testing/selftests/net/fcnal-test.sh:204:do_run_cmd()\ntools/testing/selftests/net/fcnal-test.sh-205-{\n--\ntools/testing/selftests/net/fcnal-test.sh-221-\ntools/testing/selftests/net/fcnal-test.sh:222:run_cmd()\ntools/testing/selftests/net/fcnal-test.sh-223-{\ntools/testing/selftests/net/fcnal-test.sh:224:\tdo_run_cmd ${NSA_CMD} $*\ntools/testing/selftests/net/fcnal-test.sh-225-}\ntools/testing/selftests/net/fcnal-test.sh-226-\ntools/testing/selftests/net/fcnal-test.sh:227:run_cmd_nsb()\ntools/testing/selftests/net/fcnal-test.sh-228-{\ntools/testing/selftests/net/fcnal-test.sh:229:\tdo_run_cmd ${NSB_CMD} $*\ntools/testing/selftests/net/fcnal-test.sh-230-}\ntools/testing/selftests/net/fcnal-test.sh-231-\ntools/testing/selftests/net/fcnal-test.sh:232:run_cmd_nsc()\ntools/testing/selftests/net/fcnal-test.sh-233-{\ntools/testing/selftests/net/fcnal-test.sh:234:\tdo_run_cmd ${NSC_CMD} $*\ntools/testing/selftests/net/fcnal-test.sh-235-}\n--\ntools/testing/selftests/net/fcnal-test.sh=237=setup_cmd()\n--\ntools/testing/selftests/net/fcnal-test.sh-241-\ntools/testing/selftests/net/fcnal-test.sh:242:\trun_cmd ${cmd}\ntools/testing/selftests/net/fcnal-test.sh-243-\trc=$?\n--\ntools/testing/selftests/net/fcnal-test.sh=259=setup_cmd_nsb()\n--\ntools/testing/selftests/net/fcnal-test.sh-263-\ntools/testing/selftests/net/fcnal-test.sh:264:\trun_cmd_nsb ${cmd}\ntools/testing/selftests/net/fcnal-test.sh-265-\trc=$?\n--\ntools/testing/selftests/net/fcnal-test.sh=281=setup_cmd_nsc()\n--\ntools/testing/selftests/net/fcnal-test.sh-285-\ntools/testing/selftests/net/fcnal-test.sh:286:\trun_cmd_nsc ${cmd}\ntools/testing/selftests/net/fcnal-test.sh-287-\trc=$?\n--\ntools/testing/selftests/net/fcnal-test.sh=304=set_sysctl()\n--\ntools/testing/selftests/net/fcnal-test.sh-307-\techo\ntools/testing/selftests/net/fcnal-test.sh:308:\trun_cmd sysctl -q -w $*\ntools/testing/selftests/net/fcnal-test.sh-309-}\n--\ntools/testing/selftests/net/fcnal-test.sh=584=ipv4_ping_novrf()\n--\ntools/testing/selftests/net/fcnal-test.sh-593-\t\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:594:\t\trun_cmd ping -c1 -w1 ${a}\ntools/testing/selftests/net/fcnal-test.sh-595-\t\tlog_test_addr ${a} $? 0 \"ping out\"\n--\ntools/testing/selftests/net/fcnal-test.sh-597-\t\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:598:\t\trun_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}\ntools/testing/selftests/net/fcnal-test.sh-599-\t\tlog_test_addr ${a} $? 0 \"ping out, device bind\"\n--\ntools/testing/selftests/net/fcnal-test.sh-601-\t\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:602:\t\trun_cmd ping -c1 -w1 -I ${NSA_LO_IP} ${a}\ntools/testing/selftests/net/fcnal-test.sh-603-\t\tlog_test_addr ${a} $? 0 \"ping out, address bind\"\n--\ntools/testing/selftests/net/fcnal-test.sh-610-\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:611:\trun_cmd ping -c 1 -w 1 -r ${a}\ntools/testing/selftests/net/fcnal-test.sh-612-\tlog_test_addr ${a} $? 0 \"ping out (don't route), peer on link\"\n--\ntools/testing/selftests/net/fcnal-test.sh-616-\tshow_hint \"Fails since peer is not on link\"\ntools/testing/selftests/net/fcnal-test.sh:617:\trun_cmd ping -c 1 -w 1 -r ${a}\ntools/testing/selftests/net/fcnal-test.sh-618-\tlog_test_addr ${a} $? 1 \"ping out (don't route), peer not on link\"\n--\ntools/testing/selftests/net/fcnal-test.sh-625-\t\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:626:\t\trun_cmd_nsb ping -c1 -w1 ${a}\ntools/testing/selftests/net/fcnal-test.sh-627-\t\tlog_test_addr ${a} $? 0 \"ping in\"\n--\ntools/testing/selftests/net/fcnal-test.sh-635-\t\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:636:\t\trun_cmd ping -c1 -w1 ${a}\ntools/testing/selftests/net/fcnal-test.sh-637-\t\tlog_test_addr ${a} $? 0 \"ping local\"\n--\ntools/testing/selftests/net/fcnal-test.sh-645-\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:646:\trun_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}\ntools/testing/selftests/net/fcnal-test.sh-647-\tlog_test_addr ${a} $? 0 \"ping local, device bind\"\n--\ntools/testing/selftests/net/fcnal-test.sh-655-\t\tshow_hint \"Fails since address on loopback device is out of device scope\"\ntools/testing/selftests/net/fcnal-test.sh:656:\t\trun_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}\ntools/testing/selftests/net/fcnal-test.sh-657-\t\tlog_test_addr ${a} $? 1 \"ping local, device bind\"\n--\ntools/testing/selftests/net/fcnal-test.sh-669-\ta=${NSB_LO_IP}\ntools/testing/selftests/net/fcnal-test.sh:670:\trun_cmd ping -c1 -w1 ${a}\ntools/testing/selftests/net/fcnal-test.sh-671-\tlog_test_addr ${a} $? 2 \"ping out, blocked by rule\"\n--\ntools/testing/selftests/net/fcnal-test.sh-675-\t# case succeeds despite the rule\ntools/testing/selftests/net/fcnal-test.sh:676:\t# run_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}\ntools/testing/selftests/net/fcnal-test.sh-677-\n--\ntools/testing/selftests/net/fcnal-test.sh-680-\tshow_hint \"Response generates ICMP (or arp request is ignored) due to ip rule\"\ntools/testing/selftests/net/fcnal-test.sh:681:\trun_cmd_nsb ping -c1 -w1 ${a}\ntools/testing/selftests/net/fcnal-test.sh-682-\tlog_test_addr ${a} $? 1 \"ping in, blocked by rule\"\n--\ntools/testing/selftests/net/fcnal-test.sh-697-\ta=${NSB_LO_IP}\ntools/testing/selftests/net/fcnal-test.sh:698:\trun_cmd ping -c1 -w1 ${a}\ntools/testing/selftests/net/fcnal-test.sh-699-\tlog_test_addr ${a} $? 2 \"ping out, blocked by route\"\n--\ntools/testing/selftests/net/fcnal-test.sh-703-\t# case succeeds despite not having a route for the address\ntools/testing/selftests/net/fcnal-test.sh:704:\t# run_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}\ntools/testing/selftests/net/fcnal-test.sh-705-\n--\ntools/testing/selftests/net/fcnal-test.sh-708-\tshow_hint \"Response is dropped (or arp request is ignored) due to ip route\"\ntools/testing/selftests/net/fcnal-test.sh:709:\trun_cmd_nsb ping -c1 -w1 ${a}\ntools/testing/selftests/net/fcnal-test.sh-710-\tlog_test_addr ${a} $? 1 \"ping in, blocked by route\"\n--\ntools/testing/selftests/net/fcnal-test.sh-718-\ta=${NSB_LO_IP}\ntools/testing/selftests/net/fcnal-test.sh:719:\trun_cmd ping -c1 -w1 ${a}\ntools/testing/selftests/net/fcnal-test.sh-720-\tlog_test_addr ${a} $? 2 \"ping out, unreachable default route\"\n--\ntools/testing/selftests/net/fcnal-test.sh-724-\t# case succeeds despite not having a route for the address\ntools/testing/selftests/net/fcnal-test.sh:725:\t# run_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}\ntools/testing/selftests/net/fcnal-test.sh-726-}\n--\ntools/testing/selftests/net/fcnal-test.sh=728=ipv4_ping_vrf()\n--\ntools/testing/selftests/net/fcnal-test.sh-740-\t\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:741:\t\trun_cmd ping -c1 -w1 -I ${VRF} ${a}\ntools/testing/selftests/net/fcnal-test.sh-742-\t\tlog_test_addr ${a} $? 0 \"ping out, VRF bind\"\n--\ntools/testing/selftests/net/fcnal-test.sh-744-\t\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:745:\t\trun_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}\ntools/testing/selftests/net/fcnal-test.sh-746-\t\tlog_test_addr ${a} $? 0 \"ping out, device bind\"\n--\ntools/testing/selftests/net/fcnal-test.sh-748-\t\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:749:\t\trun_cmd ip vrf exec ${VRF} ping -c1 -w1 -I ${NSA_IP} ${a}\ntools/testing/selftests/net/fcnal-test.sh-750-\t\tlog_test_addr ${a} $? 0 \"ping out, vrf device + dev address bind\"\n--\ntools/testing/selftests/net/fcnal-test.sh-752-\t\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:753:\t\trun_cmd ip vrf exec ${VRF} ping -c1 -w1 -I ${VRF_IP} ${a}\ntools/testing/selftests/net/fcnal-test.sh-754-\t\tlog_test_addr ${a} $? 0 \"ping out, vrf device + vrf address bind\"\n--\ntools/testing/selftests/net/fcnal-test.sh-762-\t\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:763:\t\trun_cmd_nsb ping -c1 -w1 ${a}\ntools/testing/selftests/net/fcnal-test.sh-764-\t\tlog_test_addr ${a} $? 0 \"ping in\"\n--\ntools/testing/selftests/net/fcnal-test.sh-773-\t\tshow_hint \"Source address should be ${a}\"\ntools/testing/selftests/net/fcnal-test.sh:774:\t\trun_cmd ping -c1 -w1 -I ${VRF} ${a}\ntools/testing/selftests/net/fcnal-test.sh-775-\t\tlog_test_addr ${a} $? 0 \"ping local, VRF bind\"\n--\ntools/testing/selftests/net/fcnal-test.sh-783-\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:784:\trun_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}\ntools/testing/selftests/net/fcnal-test.sh-785-\tlog_test_addr ${a} $? 0 \"ping local, device bind\"\n--\ntools/testing/selftests/net/fcnal-test.sh-791-\t\tshow_hint \"Fails since address on vrf device is out of device scope\"\ntools/testing/selftests/net/fcnal-test.sh:792:\t\trun_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}\ntools/testing/selftests/net/fcnal-test.sh-793-\t\tlog_test_addr ${a} $? 2 \"ping local, device bind\"\n--\ntools/testing/selftests/net/fcnal-test.sh-803-\ta=${NSB_LO_IP}\ntools/testing/selftests/net/fcnal-test.sh:804:\trun_cmd ping -c1 -w1 -I ${VRF} ${a}\ntools/testing/selftests/net/fcnal-test.sh-805-\tlog_test_addr ${a} $? 2 \"ping out, vrf bind, blocked by rule\"\n--\ntools/testing/selftests/net/fcnal-test.sh-807-\tlog_start\ntools/testing/selftests/net/fcnal-test.sh:808:\trun_cmd ping -c1 -w1 -I ${NSA_DEV} ${a}\ntools/testing/selftests/net/fcnal-test.sh-809-\tlog_test_addr ${a} $? 2 \"ping out, device bind, blocked by rule\"\n--\ntools/testing/selftests/net/fcnal-test.sh-813-\tshow_hint \"Response lost due to ip rule\"\ntools/testing/selftests/net/fcnal-test.sh:814:\trun_cmd_nsb ping -c1 -w1 ${a}\n\n"
}

gemini-3.1-pro-preview

							input: 31013
							output: 35
							thoughts: 356

**Analyzing MGLRU's Kernel Interactions**

Okay, so I'm digging into this MGLRU implementation. The core function of interest is `run_cmd` within `mm/vmscan.c`, but it's *static*. That's the first hurdle. The debugfs interface, `lru_gen_seq_write`, calls `run_cmd`, but it's also static, though it's registered as a file operation. Hmm, is there any other non-static function?

Let's see… I know `lru_gen_do_aging` exists in `tools/testing/selftests/kvm/lib/lru_gen_util.c`, but that's userspace, so it's not relevant in this context.

Right, `FocusSymbols` are supposed to be kernel functions! That's the key. The functions we can focus on are: `try_to_free_pages`, `try_to_free_mem_cgroup_pages`, `shrink_all_memory`, `user_proactive_reclaim`, and `balance_pgdat`. These seem to be the primary hooks, the heart of the changes.

Let's confirm that `user_proactive_reclaim` is non-static and not inlined. Yes, it's defined in `mm/vmscan.c` and declared in `mm/internal.h`. Confirmed. Good. I'll need to remember that. `try_to_free_mem_cgroup_pages` looks to be non-static as well. That's another potential point of entry, and `shrink_all_memory` is also non-static.

Now, I need to verify that `CONFIG_LRU_GEN` is the only config I need. It looks like the patch modifies both `mm/vmscan.c` and `include/linux/mmzone.h`. I need to ensure that the critical code changes are gated by the `#ifdef CONFIG_LRU_GEN` directives. I'll check `mm/vmscan.c` around line 3982 to confirm this. That should tell me if I have all the necessary components enabled.

{
  "File": "mm/vmscan.c",
  "FirstLine": 3960,
  "LineCount": 50
}

{
  "Contents": "3960:\t\n3961:\t\t/* find the oldest populated generation */\n3962:\t\tfor_each_evictable_type(type, swappiness) {\n3963:\t\t\twhile (min_seq[type] + MIN_NR_GENS \u003c= lrugen-\u003emax_seq) {\n3964:\t\t\t\tgen = lru_gen_from_seq(min_seq[type]);\n3965:\t\n3966:\t\t\t\tfor (zone = 0; zone \u003c MAX_NR_ZONES; zone++) {\n3967:\t\t\t\t\tif (!list_empty(\u0026lrugen-\u003efolios[gen][type][zone]))\n3968:\t\t\t\t\t\tgoto next;\n3969:\t\t\t\t}\n3970:\t\n3971:\t\t\t\tmin_seq[type]++;\n3972:\t\t\t\tseq_inc_flag = true;\n3973:\t\t\t}\n3974:\tnext:\n3975:\t\t\t;\n3976:\t\t}\n3977:\t\n3978:\t\t/*\n3979:\t\t * If min_seq[type] of both anonymous and file is not increased,\n3980:\t\t * return here to avoid unnecessary checking overhead later.\n3981:\t\t */\n3982:\t\tif (!seq_inc_flag)\n3983:\t\t\treturn;\n3984:\t\n3985:\t\tfor_each_evictable_type(type, swappiness) {\n3986:\t\t\tif (min_seq[type] \u003c= lrugen-\u003emin_seq[type])\n3987:\t\t\t\tcontinue;\n3988:\t\n3989:\t\t\treset_ctrl_pos(lruvec, type, true);\n3990:\t\t\tWRITE_ONCE(lrugen-\u003emin_seq[type], min_seq[type]);\n3991:\t\t}\n3992:\t}\n3993:\t\n3994:\tstatic bool inc_max_seq(struct lruvec *lruvec, unsigned long seq, int swappiness)\n3995:\t{\n3996:\t\tbool success;\n3997:\t\tint prev, next;\n3998:\t\tint type, zone;\n3999:\t\tstruct lru_gen_folio *lrugen = \u0026lruvec-\u003elrugen;\n4000:\trestart:\n4001:\t\tif (seq \u003c READ_ONCE(lrugen-\u003emax_seq))\n4002:\t\t\treturn false;\n4003:\t\n4004:\t\tlruvec_lock_irq(lruvec);\n4005:\t\n4006:\t\tVM_WARN_ON_ONCE(!seq_is_valid(lruvec));\n4007:\t\n4008:\t\tsuccess = seq == lrugen-\u003emax_seq;\n4009:\t\tif (!success)\n"
}

gemini-3.1-pro-preview

							input: 32612
							output: 33
							thoughts: 71

Here's my summary, as though I'm thinking through this code:

**Diving into the MGLRU Configuration**

Okay, this looks like I'm inside the MGLRU code, perfect. Now, let's get a handle on the configuration options here. What are the key settings I need to be aware of? I know `CONFIG_LRU_GEN` is the big one, but I should probably double-check if there are any others that might influence the behavior, especially related to enabling it by default. Ah, yes, there it is! `CONFIG_LRU_GEN_ENABLED` looks like exactly what I'm looking for. It's probably used to set the default behavior. To be completely sure, I should really jump over to `mm/Kconfig` and refresh my memory on the specific details of `LRU_GEN` and any dependent options. Let's go take a look there...

{
  "File": "mm/Kconfig",
  "FirstLine": 1400,
  "LineCount": 40
}

{
  "Contents": "1400:\t# multi-gen LRU {\n1401:\tconfig LRU_GEN\n1402:\t\tbool \"Multi-Gen LRU\"\n1403:\t\tdepends on MMU\n1404:\t\t# make sure folio-\u003eflags has enough spare bits\n1405:\t\tdepends on 64BIT || !SPARSEMEM || SPARSEMEM_VMEMMAP\n1406:\t\thelp\n1407:\t\t  A high performance LRU implementation to overcommit memory. See\n1408:\t\t  Documentation/admin-guide/mm/multigen_lru.rst for details.\n1409:\t\n1410:\tconfig LRU_GEN_ENABLED\n1411:\t\tbool \"Enable by default\"\n1412:\t\tdepends on LRU_GEN\n1413:\t\thelp\n1414:\t\t  This option enables the multi-gen LRU by default.\n1415:\t\n1416:\tconfig LRU_GEN_STATS\n1417:\t\tbool \"Full stats for debugging\"\n1418:\t\tdepends on LRU_GEN\n1419:\t\thelp\n1420:\t\t  Do not enable this option unless you plan to look at historical stats\n1421:\t\t  from evicted generations for debugging purpose.\n1422:\t\n1423:\t\t  This option has a per-memcg and per-node memory overhead.\n1424:\t\n1425:\tconfig LRU_GEN_WALKS_MMU\n1426:\t\tdef_bool y\n1427:\t\tdepends on LRU_GEN \u0026\u0026 ARCH_HAS_HW_PTE_YOUNG\n1428:\t# }\n1429:\t\n1430:\tconfig ARCH_SUPPORTS_PER_VMA_LOCK\n1431:\t       def_bool n\n1432:\t\n1433:\tconfig PER_VMA_LOCK\n1434:\t\tdef_bool y\n1435:\t\tdepends on ARCH_SUPPORTS_PER_VMA_LOCK \u0026\u0026 MMU \u0026\u0026 SMP\n1436:\t\thelp\n1437:\t\t  Allow per-vma locking during page fault handling.\n1438:\t\n1439:\t\t  This feature allows locking each virtual memory area separately when\n"
}

gemini-3.1-pro-preview

							input: 33491
							output: 18
							thoughts: 617

**My Fuzzing Strategy for Memory Reclaim**

Okay, so I'm looking at this patch and my initial thought is: `LRU_GEN` and `LRU_GEN_ENABLED` are the configurations involved. I'll make sure to include those in `EnableConfigs` since they seem central to this memory reclaim change.

I've reviewed the patch itself and it's touching `mm/vmscan.c` and `include/linux/mmzone.h`. From what I can tell, the modifications are functional, involving changes to how the system handles swappiness checks, how it manages generation exhaustion during folio scans, retries with different folio types, and triggers aging based on exhaustion and imbalance. This is definitely worth a fuzzing campaign to uncover any subtle bugs.

Now, let's nail down the critical symbols. I'm focusing on the entry points: `try_to_free_pages` is the direct reclaim entry, and `try_to_free_mem_cgroup_pages` is for memcg reclaim. `user_proactive_reclaim` is another, as is `shrink_all_memory`. I know `balance_pgdat` (kswapd) is a kthread, but it's non-static so it's a valid target too, even if indirectly through memory allocation.

I'm listing `try_to_free_pages`, `try_to_free_mem_cgroup_pages`, `user_proactive_reclaim`, and `shrink_all_memory` as my core fuzzing targets.

I need to confirm the availability of `user_proactive_reclaim`; yes, it's there in `mm/vmscan.c`. And `shrink_all_memory`, which is also in `mm/vmscan.c`, used for hibernation. I'm leaning toward prioritizing `user_proactive_reclaim` and `try_to_free_mem_cgroup_pages` as more direct reclaim entry points.

I'll also keep in mind that `sys_madvise` with `MADV_PAGEOUT` or `MADV_COLD`, which lead to `madvise_pageout` and ultimately to `reclaim_pages`. That's another potential vector, so I should analyze `reclaim_pages` too to see if that should also be added.

{
  "Expression": "reclaim_pages"
}

{
  "Output": "arch/x86/kernel/cpu/sgx/main.c=257=static void sgx_reclaimer_write(struct sgx_epc_page *epc_page,\n--\narch/x86/kernel/cpu/sgx/main.c-302- */\narch/x86/kernel/cpu/sgx/main.c:303:static void sgx_reclaim_pages(void)\narch/x86/kernel/cpu/sgx/main.c-304-{\n--\narch/x86/kernel/cpu/sgx/main.c=396=void sgx_reclaim_direct(void)\n--\narch/x86/kernel/cpu/sgx/main.c-398-\tif (sgx_should_reclaim(SGX_NR_LOW_PAGES))\narch/x86/kernel/cpu/sgx/main.c:399:\t\tsgx_reclaim_pages();\narch/x86/kernel/cpu/sgx/main.c-400-}\n--\narch/x86/kernel/cpu/sgx/main.c=402=static int ksgxd(void *p)\n--\narch/x86/kernel/cpu/sgx/main.c-421-\t\tif (sgx_should_reclaim(SGX_NR_HIGH_PAGES))\narch/x86/kernel/cpu/sgx/main.c:422:\t\t\tsgx_reclaim_pages();\narch/x86/kernel/cpu/sgx/main.c-423-\n--\narch/x86/kernel/cpu/sgx/main.c=567=struct sgx_epc_page *sgx_alloc_epc_page(void *owner, bool reclaim)\n--\narch/x86/kernel/cpu/sgx/main.c-590-\narch/x86/kernel/cpu/sgx/main.c:591:\t\tsgx_reclaim_pages();\narch/x86/kernel/cpu/sgx/main.c-592-\t\tcond_resched();\n--\ndrivers/crypto/ccp/sev-dev-tio.c=387=static void sla_free(struct sla_addr_t sla, size_t len, bool firmware_state)\n--\ndrivers/crypto/ccp/sev-dev-tio.c-403-\ndrivers/crypto/ccp/sev-dev-tio.c:404:\t\t\t\tret = snp_reclaim_pages(sla_to_pa(scatter[i]), 1, false);\ndrivers/crypto/ccp/sev-dev-tio.c-405-\t\t\t\tif (ret)\n--\ndrivers/crypto/ccp/sev-dev-tio.c-408-\t\t} else {\ndrivers/crypto/ccp/sev-dev-tio.c:409:\t\t\tret = snp_reclaim_pages(sla_to_pa(sla), 1, false);\ndrivers/crypto/ccp/sev-dev-tio.c-410-\t\t}\n--\ndrivers/crypto/ccp/sev-dev.c=358=static int sev_write_init_ex_file_if_required(int cmd_id)\n--\ndrivers/crypto/ccp/sev-dev.c-383-\ndrivers/crypto/ccp/sev-dev.c:384:int snp_reclaim_pages(unsigned long paddr, unsigned int npages, bool locked)\ndrivers/crypto/ccp/sev-dev.c-385-{\n--\ndrivers/crypto/ccp/sev-dev.c-417-}\ndrivers/crypto/ccp/sev-dev.c:418:EXPORT_SYMBOL_GPL(snp_reclaim_pages);\ndrivers/crypto/ccp/sev-dev.c-419-\ndrivers/crypto/ccp/sev-dev.c=420=static int rmp_mark_pages_firmware(unsigned long paddr, unsigned int npages, bool locked)\n--\ndrivers/crypto/ccp/sev-dev.c-438-\t */\ndrivers/crypto/ccp/sev-dev.c:439:\tsnp_reclaim_pages(paddr, i, locked);\ndrivers/crypto/ccp/sev-dev.c-440-\n--\ndrivers/crypto/ccp/sev-dev.c=479=static void __snp_free_firmware_pages(struct page *page, int order, bool locked)\n--\ndrivers/crypto/ccp/sev-dev.c-488-\tif (sev-\u003esnp_initialized \u0026\u0026\ndrivers/crypto/ccp/sev-dev.c:489:\t    snp_reclaim_pages(paddr, npages, locked))\ndrivers/crypto/ccp/sev-dev.c-490-\t\treturn;\n--\ndrivers/crypto/ccp/sev-dev.c=712=static int snp_unmap_cmd_buf_desc(struct cmd_buf_desc *desc)\n--\ndrivers/crypto/ccp/sev-dev.c-721-\t/* Transition the buffers back to hypervisor-owned. */\ndrivers/crypto/ccp/sev-dev.c:722:\tif (snp_reclaim_pages(*desc-\u003epaddr_ptr, npages, true)) {\ndrivers/crypto/ccp/sev-dev.c-723-\t\tpr_warn(\"Failed to reclaim firmware-owned pages while issuing SEV legacy command.\\n\");\n--\ndrivers/crypto/ccp/sev-dev.c=833=static int snp_reclaim_cmd_buf(int cmd, void *cmd_buf)\n--\ndrivers/crypto/ccp/sev-dev.c-842-\tif (sev_cmd_buf_writable(cmd))\ndrivers/crypto/ccp/sev-dev.c:843:\t\tif (snp_reclaim_pages(__pa(cmd_buf), 1, true))\ndrivers/crypto/ccp/sev-dev.c-844-\t\t\treturn -EFAULT;\n--\ndrivers/crypto/ccp/sev-dev.c=1355=static int __sev_snp_init_locked(int *error, unsigned int max_snp_asid)\n--\ndrivers/crypto/ccp/sev-dev.c-1494-\t\t * This executes with the sev_cmd_mutex held so down the stack\ndrivers/crypto/ccp/sev-dev.c:1495:\t\t * snp_reclaim_pages(locked=false) might be needed (which is extremely\ndrivers/crypto/ccp/sev-dev.c-1496-\t\t * unlikely) but will cause a deadlock.\n--\ndrivers/crypto/ccp/sev-dev.c=2372=static int __sev_do_snp_platform_status(struct sev_user_data_snp_status *status,\n--\ndrivers/crypto/ccp/sev-dev.c-2407-\t\t * The status page will be in Reclaim state on success, or left\ndrivers/crypto/ccp/sev-dev.c:2408:\t\t * in Firmware state on failure. Use snp_reclaim_pages() to\ndrivers/crypto/ccp/sev-dev.c-2409-\t\t * transition either case back to Hypervisor-owned state.\ndrivers/crypto/ccp/sev-dev.c-2410-\t\t */\ndrivers/crypto/ccp/sev-dev.c:2411:\t\tif (snp_reclaim_pages(__pa(data), 1, true))\ndrivers/crypto/ccp/sev-dev.c-2412-\t\t\treturn -EFAULT;\n--\ndrivers/net/ethernet/mellanox/mlx5/core/debugfs.c=280=void mlx5_pages_debugfs_init(struct mlx5_core_dev *dev)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/debugfs.c-290-\tdebugfs_create_u32(\"fw_pages_reclaim_discard\", 0400, pages,\ndrivers/net/ethernet/mellanox/mlx5/core/debugfs.c:291:\t\t\t   \u0026dev-\u003epriv.reclaim_pages_discard);\ndrivers/net/ethernet/mellanox/mlx5/core/debugfs.c-292-}\n--\ndrivers/net/ethernet/mellanox/mlx5/core/lib/tout.c=127=static int tout_query_dtor(struct mlx5_core_dev *dev)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/lib/tout.c-148-\tMLX5_TIMEOUT_FILL(fsm_reactivate_to, out, dev, MLX5_TO_FSM_REACTIVATE_MS, 0);\ndrivers/net/ethernet/mellanox/mlx5/core/lib/tout.c:149:\tMLX5_TIMEOUT_FILL(reclaim_pages_to, out, dev, MLX5_TO_RECLAIM_PAGES_MS, 0);\ndrivers/net/ethernet/mellanox/mlx5/core/lib/tout.c-150-\tMLX5_TIMEOUT_FILL(reclaim_vfs_pages_to, out, dev, MLX5_TO_RECLAIM_VFS_PAGES_MS, 0);\n--\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c=518=static u32 fwp_fill_manage_pages_out(struct fw_page *fwp, u32 *out, u32 index,\n--\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-535-\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c:536:static int reclaim_pages_cmd(struct mlx5_core_dev *dev,\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-537-\t\t\t     u32 *in, int in_size, u32 *out, int out_size)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-574-\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c:575:static int reclaim_pages(struct mlx5_core_dev *dev, u16 func_vhca_id,\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-576-\t\t\t int npages, int *nclaimed, bool event,\n--\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-606-\t\t      mlx5_page_mgt_mode_is_vhca_id(dev));\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c:607:\terr = reclaim_pages_cmd(dev, in, sizeof(in), out, outlen);\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-608-\tif (err) {\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-609-\t\tnpages = MLX5_GET(manage_pages_in, in, input_num_entries);\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c:610:\t\tdev-\u003epriv.reclaim_pages_discard += npages;\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-611-\t}\n--\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c=643=static void pages_work_handler(struct work_struct *work)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-651-\telse if (req-\u003enpages \u003c 0)\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c:652:\t\terr = reclaim_pages(dev, req-\u003efunc_id, -1 * req-\u003enpages, NULL,\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-653-\t\t\t\t    true, req-\u003eec_function);\n--\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c=830=static int mlx5_reclaim_root_pages(struct mlx5_core_dev *dev,\n--\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-841-\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c:842:\t\terr = reclaim_pages(dev, func_vhca_id,\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-843-\t\t\t\t    optimal_reclaimed_pages(),\n--\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-846-\t\t\tmlx5_core_warn(dev,\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c:847:\t\t\t\t       \"reclaim_pages err (%d) func_vhca_id=0x%x ec_func=0x%x\\n\",\ndrivers/net/ethernet/mellanox/mlx5/core/pagealloc.c-848-\t\t\t\t       err, func_vhca_id, ec_function);\n--\ninclude/linux/mlx5/driver.h=573=struct mlx5_priv {\n--\ninclude/linux/mlx5/driver.h-587-\tu32\t\t\tgive_pages_dropped;\ninclude/linux/mlx5/driver.h:588:\tu32\t\t\treclaim_pages_discard;\ninclude/linux/mlx5/driver.h-589-\tenum mlx5_page_mgt_mode\tpage_mgt_mode;\n--\ninclude/linux/mlx5/mlx5_ifc.h=3455=struct mlx5_ifc_dtor_reg_bits {\n--\ninclude/linux/mlx5/mlx5_ifc.h-3475-\ninclude/linux/mlx5/mlx5_ifc.h:3476:\tstruct mlx5_ifc_default_timeout_bits reclaim_pages_to;\ninclude/linux/mlx5/mlx5_ifc.h-3477-\n--\ninclude/linux/psp-sev.h=1081=void *snp_alloc_firmware_page(gfp_t mask);\ninclude/linux/psp-sev.h:1082:int snp_reclaim_pages(unsigned long paddr, unsigned int npages, bool locked);\ninclude/linux/psp-sev.h-1083-void snp_free_firmware_page(void *addr);\n--\ninclude/linux/psp-sev.h=1115=static inline void *snp_alloc_firmware_page(gfp_t mask)\n--\ninclude/linux/psp-sev.h-1119-\ninclude/linux/psp-sev.h:1120:static inline int snp_reclaim_pages(unsigned long paddr, unsigned int npages, bool locked)\ninclude/linux/psp-sev.h-1121-{\n--\ninclude/trace/events/vmscan.h=409=TRACE_EVENT(mm_vmscan_write_folio,\n--\ninclude/trace/events/vmscan.h-431-\ninclude/trace/events/vmscan.h:432:TRACE_EVENT(mm_vmscan_reclaim_pages,\ninclude/trace/events/vmscan.h-433-\n--\nmm/damon/paddr.c=220=static unsigned long damon_pa_pageout(struct damon_region *r,\n--\nmm/damon/paddr.c-271-\t\tdamos_destroy_filter(filter);\nmm/damon/paddr.c:272:\tapplied = reclaim_pages(\u0026folio_list);\nmm/damon/paddr.c-273-\tcond_resched();\n--\nmm/internal.h=1205=extern unsigned long  __must_check vm_mmap_pgoff(struct file *, unsigned long,\n--\nmm/internal.h-1208-\nmm/internal.h:1209:unsigned long reclaim_pages(struct list_head *folio_list);\nmm/internal.h-1210-unsigned int reclaim_clean_pages_from_list(struct zone *zone,\n--\nmm/madvise.c=353=static int madvise_cold_or_pageout_pte_range(pmd_t *pmd,\n--\nmm/madvise.c-442-\t\tif (pageout)\nmm/madvise.c:443:\t\t\treclaim_pages(\u0026folio_list);\nmm/madvise.c-444-\t\treturn 0;\n--\nmm/madvise.c-561-\tif (pageout)\nmm/madvise.c:562:\t\treclaim_pages(\u0026folio_list);\nmm/madvise.c-563-\tcond_resched();\n--\nmm/vmscan.c=2153=static unsigned int reclaim_folio_list(struct list_head *folio_list,\n--\nmm/vmscan.c-2172-\t}\nmm/vmscan.c:2173:\ttrace_mm_vmscan_reclaim_pages(pgdat-\u003enode_id, sc.nr_scanned, nr_reclaimed, \u0026stat);\nmm/vmscan.c-2174-\n--\nmm/vmscan.c-2177-\nmm/vmscan.c:2178:unsigned long reclaim_pages(struct list_head *folio_list)\nmm/vmscan.c-2179-{\n"
}

gemini-3.1-pro-preview

							input: 39056
							output: 35
							thoughts: 448

**Analyzing the Interaction of Page Reclaim and MGLRU**

Okay, let's break this down. My initial observation is that `reclaim_pages` isn't static and is called by `madvise_cold_or_pageout_pte_range` and `damon_pa_pageout`. However, the patch also touches functions like `scan_folios`, `isolate_folios`, `evict_folios`, and `should_run_aging`, which are all deeply involved in MGLRU. This is interesting.

Now, `reclaim_pages` further calls `reclaim_folio_list`, which in turn calls `shrink_folio_list`. Ah, there's the distinction! `shrink_folio_list` is the active/inactive LRU reclaim path, which isn't MGLRU directly. MGLRU uses `evict_folios`, which *internally* calls `shrink_folio_list`. And, `madvise_pageout` calls `reclaim_pages`, leading back to `reclaim_folio_list`. So, `reclaim_pages` itself isn't using MGLRU directly; it's simply reclaiming the specific folios passed to it. It is MGLRU that actually makes the page replacement decisions, determining *which* pages to reclaim.

So, the critical entry points that trigger MGLRU functionality are the functions that shrink the LRU lists, specifically `shrink_lruvec`. That’s it! That's the entry point! So those are the functions I want. I am going to use:

*   `try_to_free_pages`
*   `try_to_free_mem_cgroup_pages`
*   `user_proactive_reclaim`
*   `shrink_all_memory`

Right, let's double-check about `user_proactive_reclaim`. I need to ensure it's available when `CONFIG_MEMCG` is enabled. A quick look at `mm/vmscan.c` shows it’s there, and it does indeed depend on `CONFIG_MEMCG`. Just to be safe, I’ll add `MEMCG` to `EnableConfigs` even though it's usually enabled anyway. Always better to be explicit. Okay, time to dive deeper into `mm/vmscan.c` and confirm that everything is as expected regarding `user_proactive_reclaim`.

{
  "File": "mm/vmscan.c",
  "FirstLine": 8030,
  "LineCount": 20
}

{
  "Contents": "8030:\tstatic const match_table_t tokens = {\n8031:\t\t{ MEMORY_RECLAIM_SWAPPINESS, \"swappiness=%d\"},\n8032:\t\t{ MEMORY_RECLAIM_SWAPPINESS_MAX, \"swappiness=max\"},\n8033:\t\t{ MEMORY_RECLAIM_NULL, NULL },\n8034:\t};\n8035:\t\n8036:\tint user_proactive_reclaim(char *buf,\n8037:\t\t\t\t   struct mem_cgroup *memcg, pg_data_t *pgdat)\n8038:\t{\n8039:\t\tunsigned int nr_retries = MAX_RECLAIM_RETRIES;\n8040:\t\tunsigned long nr_to_reclaim, nr_reclaimed = 0;\n8041:\t\tint swappiness = -1;\n8042:\t\tchar *old_buf, *start;\n8043:\t\tsubstring_t args[MAX_OPT_ARGS];\n8044:\t\tgfp_t gfp_mask = GFP_KERNEL;\n8045:\t\n8046:\t\tif (!buf || (!memcg \u0026\u0026 !pgdat) || (memcg \u0026\u0026 pgdat))\n8047:\t\t\treturn -EINVAL;\n8048:\t\n8049:\t\tbuf = strstrip(buf);\n"
}

gemini-3.1-pro-preview

							input: 40412
							output: 21
							thoughts: 106

**Investigating the Availability of `user_proactive_reclaim`**

Okay, hold on a minute. It's dawning on me that `user_proactive_reclaim` might *not* be guarded by that `#ifdef CONFIG_MEMCG` directive. That's a crucial point, and I need to verify that assumption. So, let's explore whether `user_proactive_reclaim` is accessible even when `CONFIG_MEMCG` is disabled.

Hmm, it takes a `struct mem_cgroup *memcg` argument, which is the giveaway. However, if `CONFIG_MEMCG` is off, the kernel *still* declares `struct mem_cgroup`, right? It might be an opaque struct or possibly an empty struct. I need to confirm how it's handled in that scenario.

Alright, let's cut the chase. I need to run a quick search for `#ifdef CONFIG_MEMCG` within `mm/vmscan.c` to understand the true dependencies of that function. That'll clear up any potential confusion and give me a concrete answer.

{
  "Expression": "^#ifdef CONFIG_MEMCG"
}

{
  "Output": "\nFull output is too long, showing 500 out of 744 lines.\nUse more precise expression if possible.\n\nblock/blk-cgroup.c=1508=struct cgroup_subsys io_cgrp_subsys = {\n--\nblock/blk-cgroup.c-1517-\t.exit = blkcg_exit,\nblock/blk-cgroup.c:1518:#ifdef CONFIG_MEMCG\nblock/blk-cgroup.c-1519-\t/*\n--\ndrivers/block/loop.c=1843=static blk_status_t loop_queue_rq(struct blk_mq_hw_ctx *hctx,\n--\ndrivers/block/loop.c-1871-\t\tcmd-\u003eblkcg_css = bio_blkcg_css(rq-\u003ebio);\ndrivers/block/loop.c:1872:#ifdef CONFIG_MEMCG\ndrivers/block/loop.c-1873-\t\tif (cmd-\u003eblkcg_css) {\n--\ndrivers/iommu/iommu-pages.c=19=IOPTDESC_MATCH(_refcount, __page_refcount);\ndrivers/iommu/iommu-pages.c:20:#ifdef CONFIG_MEMCG\ndrivers/iommu/iommu-pages.c-21-IOPTDESC_MATCH(memcg_data, memcg_data);\n--\ndrivers/iommu/iommu-pages.h=19=struct ioptdesc {\n--\ndrivers/iommu/iommu-pages.h-31-\tatomic_t __page_refcount;\ndrivers/iommu/iommu-pages.h:32:#ifdef CONFIG_MEMCG\ndrivers/iommu/iommu-pages.h-33-\tunsigned long memcg_data;\n--\nfs/proc/page.c=261=static const struct proc_ops kpageflags_proc_ops = {\n--\nfs/proc/page.c-266-\nfs/proc/page.c:267:#ifdef CONFIG_MEMCG\nfs/proc/page.c-268-static ssize_t kpagecgroup_read(struct file *file, char __user *buf,\n--\nfs/proc/page.c=280=static int __init proc_page_init(void)\n--\nfs/proc/page.c-283-\tproc_create(\"kpageflags\", S_IRUSR, NULL, \u0026kpageflags_proc_ops);\nfs/proc/page.c:284:#ifdef CONFIG_MEMCG\nfs/proc/page.c-285-\tproc_create(\"kpagecgroup\", S_IRUSR, NULL, \u0026kpagecgroup_proc_ops);\n--\ninclude/linux/bpf.h=300=struct bpf_map {\n--\ninclude/linux/bpf.h-320-\tstruct btf *btf;\ninclude/linux/bpf.h:321:#ifdef CONFIG_MEMCG\ninclude/linux/bpf.h-322-\tstruct obj_cgroup *objcg;\n--\ninclude/linux/bpf.h=2780=int bpf_map_alloc_pages(const struct bpf_map *map, int nid,\ninclude/linux/bpf.h-2781-\t\t\tunsigned long nr_pages, struct page **page_array);\ninclude/linux/bpf.h:2782:#ifdef CONFIG_MEMCG\ninclude/linux/bpf.h-2783-void bpf_map_memcg_enter(const struct bpf_map *map, struct mem_cgroup **old_memcg,\n--\ninclude/linux/list_lru.h=51=struct list_lru {\ninclude/linux/list_lru.h-52-\tstruct list_lru_node\t*node;\ninclude/linux/list_lru.h:53:#ifdef CONFIG_MEMCG\ninclude/linux/list_lru.h-54-\tstruct list_head\tlist;\n--\ninclude/linux/list_lru.h=82=int memcg_list_lru_alloc(struct mem_cgroup *memcg, struct list_lru *lru,\n--\ninclude/linux/list_lru.h-84-\ninclude/linux/list_lru.h:85:#ifdef CONFIG_MEMCG\ninclude/linux/list_lru.h-86-/**\n--\ninclude/linux/memcontrol.h=60=struct mem_cgroup_reclaim_cookie {\n--\ninclude/linux/memcontrol.h-64-\ninclude/linux/memcontrol.h:65:#ifdef CONFIG_MEMCG\ninclude/linux/memcontrol.h-66-\n--\ninclude/linux/memcontrol.h=89=struct mem_cgroup_per_node {\n--\ninclude/linux/memcontrol.h-97-\ninclude/linux/memcontrol.h:98:#ifdef CONFIG_MEMCG_V1\ninclude/linux/memcontrol.h-99-\t/*\n--\ninclude/linux/memcontrol.h-128-\ninclude/linux/memcontrol.h:129:#ifdef CONFIG_MEMCG_NMI_SAFETY_REQUIRES_ATOMIC\ninclude/linux/memcontrol.h-130-\t/* slab stats for nmi context */\n--\ninclude/linux/memcontrol.h=202=struct mem_cgroup {\n--\ninclude/linux/memcontrol.h-255-\ninclude/linux/memcontrol.h:256:#ifdef CONFIG_MEMCG_NMI_SAFETY_REQUIRES_ATOMIC\ninclude/linux/memcontrol.h-257-\t/* MEMCG_KMEM for nmi context */\n--\ninclude/linux/memcontrol.h-283-\ninclude/linux/memcontrol.h:284:#ifdef CONFIG_MEMCG_V1\ninclude/linux/memcontrol.h-285-\t/* Legacy consumer-oriented counters */\n--\ninclude/linux/memcontrol.h=354=enum objext_flags {\n--\ninclude/linux/memcontrol.h-367-\ninclude/linux/memcontrol.h:368:#ifdef CONFIG_MEMCG\ninclude/linux/memcontrol.h-369-/*\n--\ninclude/linux/memcontrol.h=1476=struct slabobj_ext {\ninclude/linux/memcontrol.h:1477:#ifdef CONFIG_MEMCG\ninclude/linux/memcontrol.h-1478-\tstruct obj_cgroup *objcg;\n--\ninclude/linux/memcontrol.h=1504=static inline struct lruvec *lruvec_live_lock_irq(struct lruvec *lruvec)\ninclude/linux/memcontrol.h-1505-{\ninclude/linux/memcontrol.h:1506:#ifdef CONFIG_MEMCG\ninclude/linux/memcontrol.h-1507-\tstruct pglist_data *pgdat = lruvec_pgdat(lruvec);\n--\ninclude/linux/memcontrol.h=1639=struct sock;\ninclude/linux/memcontrol.h:1640:#ifdef CONFIG_MEMCG\ninclude/linux/memcontrol.h-1641-extern struct static_key_false memcg_sockets_enabled_key;\n--\ninclude/linux/memcontrol.h=1727=static inline int shrinker_id(struct shrinker *shrinker)\n--\ninclude/linux/memcontrol.h-1732-\ninclude/linux/memcontrol.h:1733:#ifdef CONFIG_MEMCG\ninclude/linux/memcontrol.h-1734-bool mem_cgroup_kmem_disabled(void);\n--\ninclude/linux/memcontrol.h=1919=static inline bool mem_cgroup_zswap_writeback_enabled(struct mem_cgroup *memcg)\n--\ninclude/linux/memcontrol.h-1928-\ninclude/linux/memcontrol.h:1929:#ifdef CONFIG_MEMCG_V1\ninclude/linux/memcontrol.h-1930-unsigned long memcg1_soft_limit_reclaim(pg_data_t *pgdat, int order,\n--\ninclude/linux/mm_inline.h=47=static __always_inline void update_lru_size(struct lruvec *lruvec,\n--\ninclude/linux/mm_inline.h-51-\t__update_lru_size(lruvec, lru, zid, nr_pages);\ninclude/linux/mm_inline.h:52:#ifdef CONFIG_MEMCG\ninclude/linux/mm_inline.h-53-\tmem_cgroup_update_lru_size(lruvec, lru, zid, nr_pages);\n--\ninclude/linux/mm_types.h=80=struct page {\n--\ninclude/linux/mm_types.h-186-\ninclude/linux/mm_types.h:187:#ifdef CONFIG_MEMCG\ninclude/linux/mm_types.h-188-\tunsigned long memcg_data;\n--\ninclude/linux/mm_types.h=404=struct folio {\n--\ninclude/linux/mm_types.h-435-\t\t\tatomic_t _refcount;\ninclude/linux/mm_types.h:436:#ifdef CONFIG_MEMCG\ninclude/linux/mm_types.h-437-\t\t\tunsigned long memcg_data;\n--\ninclude/linux/mm_types.h=521=FOLIO_MATCH(_refcount, _refcount);\ninclude/linux/mm_types.h:522:#ifdef CONFIG_MEMCG\ninclude/linux/mm_types.h-523-FOLIO_MATCH(memcg_data, memcg_data);\n--\ninclude/linux/mm_types.h=576=struct ptdesc {\n--\ninclude/linux/mm_types.h-607-\tatomic_t __page_refcount;\ninclude/linux/mm_types.h:608:#ifdef CONFIG_MEMCG\ninclude/linux/mm_types.h-609-\tunsigned long pt_memcg_data;\n--\ninclude/linux/mm_types.h=622=TABLE_MATCH(_refcount, __page_refcount);\ninclude/linux/mm_types.h:623:#ifdef CONFIG_MEMCG\ninclude/linux/mm_types.h-624-TABLE_MATCH(memcg_data, pt_memcg_data);\n--\ninclude/linux/mm_types.h=1175=struct mm_struct {\n--\ninclude/linux/mm_types.h-1327-#endif\ninclude/linux/mm_types.h:1328:#ifdef CONFIG_MEMCG\ninclude/linux/mm_types.h-1329-\t\t/*\n--\ninclude/linux/mm_types.h-1412-\t\t\tunsigned long bitmap;\ninclude/linux/mm_types.h:1413:#ifdef CONFIG_MEMCG\ninclude/linux/mm_types.h-1414-\t\t\t/* points to the memcg of \"owner\" above */\n--\ninclude/linux/mm_types.h=1502=static inline void lru_gen_init_mm(struct mm_struct *mm)\n--\ninclude/linux/mm_types.h-1505-\tmm-\u003elru_gen.bitmap = 0;\ninclude/linux/mm_types.h:1506:#ifdef CONFIG_MEMCG\ninclude/linux/mm_types.h-1507-\tmm-\u003elru_gen.memcg = NULL;\n--\ninclude/linux/mmzone.h=764=struct lruvec {\n--\ninclude/linux/mmzone.h-791-#endif /* CONFIG_LRU_GEN */\ninclude/linux/mmzone.h:792:#ifdef CONFIG_MEMCG\ninclude/linux/mmzone.h-793-\tstruct pglist_data *pgdat;\n--\ninclude/linux/mmzone.h=1664=static inline struct pglist_data *lruvec_pgdat(struct lruvec *lruvec)\ninclude/linux/mmzone.h-1665-{\ninclude/linux/mmzone.h:1666:#ifdef CONFIG_MEMCG\ninclude/linux/mmzone.h-1667-\treturn lruvec-\u003epgdat;\n--\ninclude/linux/sched.h=826=struct task_struct {\n--\ninclude/linux/sched.h-1021-#endif\ninclude/linux/sched.h:1022:#ifdef CONFIG_MEMCG_V1\ninclude/linux/sched.h-1023-\tunsigned\t\t\tin_user_fault:1;\n--\ninclude/linux/sched.h-1548-\ninclude/linux/sched.h:1549:#ifdef CONFIG_MEMCG_V1\ninclude/linux/sched.h-1550-\tstruct mem_cgroup\t\t*memcg_in_oom;\n--\ninclude/linux/sched.h-1552-\ninclude/linux/sched.h:1553:#ifdef CONFIG_MEMCG\ninclude/linux/sched.h-1554-\t/* Number of pages to reclaim on returning to userland: */\n--\ninclude/linux/sched/mm.h=161=extern void exec_mm_release(struct task_struct *, struct mm_struct *);\ninclude/linux/sched/mm.h-162-\ninclude/linux/sched/mm.h:163:#ifdef CONFIG_MEMCG\ninclude/linux/sched/mm.h-164-extern void mm_update_next_owner(struct mm_struct *mm);\n--\ninclude/linux/sched/mm.h=466=static inline void memalloc_pin_restore(unsigned int flags)\n--\ninclude/linux/sched/mm.h-470-\ninclude/linux/sched/mm.h:471:#ifdef CONFIG_MEMCG\ninclude/linux/sched/mm.h-472-DECLARE_PER_CPU(struct mem_cgroup *, int_active_memcg);\n--\ninclude/linux/shrinker.h=82=struct shrinker {\n--\ninclude/linux/shrinker.h-106-\tstruct list_head list;\ninclude/linux/shrinker.h:107:#ifdef CONFIG_MEMCG\ninclude/linux/shrinker.h-108-\t/* ID in shrinker_idr */\n--\ninclude/linux/slab.h=26=enum _slab_flag_bits {\n--\ninclude/linux/slab.h-45-#endif\ninclude/linux/slab.h:46:#ifdef CONFIG_MEMCG\ninclude/linux/slab.h-47-\t_SLAB_ACCOUNT,\n--\ninclude/linux/slab.h-204- */\ninclude/linux/slab.h:205:#ifdef CONFIG_MEMCG\ninclude/linux/slab.h-206-# define SLAB_ACCOUNT\t\t__SLAB_FLAG_BIT(_SLAB_ACCOUNT)\n--\ninclude/linux/slab.h=708=enum kmalloc_cache_type {\n--\ninclude/linux/slab.h-728-#endif\ninclude/linux/slab.h:729:#ifdef CONFIG_MEMCG\ninclude/linux/slab.h-730-\tKMALLOC_CGROUP,\n--\ninclude/linux/swap.h=467=static inline int add_swap_extent(struct swap_info_struct *sis,\n--\ninclude/linux/swap.h-473-#endif /* CONFIG_SWAP */\ninclude/linux/swap.h:474:#ifdef CONFIG_MEMCG\ninclude/linux/swap.h-475-void lru_reparent_memcg(struct mem_cgroup *memcg, struct mem_cgroup *parent, int nid);\n--\ninclude/linux/vmpressure.h=13=struct vmpressure {\n--\ninclude/linux/vmpressure.h-18-\ninclude/linux/vmpressure.h:19:#ifdef CONFIG_MEMCG_V1\ninclude/linux/vmpressure.h-20-\t/*\n--\ninclude/linux/vmpressure.h=43=struct mem_cgroup;\ninclude/linux/vmpressure.h-44-\ninclude/linux/vmpressure.h:45:#ifdef CONFIG_MEMCG\ninclude/linux/vmpressure.h-46-void vmpressure(gfp_t gfp, int order, struct mem_cgroup *memcg, bool tree,\n--\ninclude/linux/vmpressure.h=55=extern enum vmpressure_levels vmpressure_calc_level(unsigned long scanned,\n--\ninclude/linux/vmpressure.h-57-\ninclude/linux/vmpressure.h:58:#ifdef CONFIG_MEMCG_V1\ninclude/linux/vmpressure.h-59-extern void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg, int prio);\n--\ninclude/linux/vmstat.h=522=static inline const char *vm_event_name(enum vm_event_item item)\n--\ninclude/linux/vmstat.h-531-\ninclude/linux/vmstat.h:532:#ifdef CONFIG_MEMCG\ninclude/linux/vmstat.h-533-\n--\ninclude/net/sock.h=365=struct sock {\n--\ninclude/net/sock.h-460-\tstruct socket\t\t*sk_socket;\ninclude/net/sock.h:461:#ifdef CONFIG_MEMCG\ninclude/net/sock.h-462-\tstruct mem_cgroup\t*sk_memcg;\n--\ninclude/net/sock.h=2686=static inline gfp_t gfp_memcg_charge(void)\n--\ninclude/net/sock.h-2690-\ninclude/net/sock.h:2691:#ifdef CONFIG_MEMCG\ninclude/net/sock.h-2692-static inline struct mem_cgroup *mem_cgroup_from_sk(const struct sock *sk)\n--\ninclude/net/sock.h=2702=static inline bool mem_cgroup_sk_under_memory_pressure(const struct sock *sk)\n--\ninclude/net/sock.h-2705-\ninclude/net/sock.h:2706:#ifdef CONFIG_MEMCG_V1\ninclude/net/sock.h-2707-\tif (!cgroup_subsys_on_dfl(memory_cgrp_subsys))\n--\ninclude/trace/events/vmscan.h=203=DEFINE_EVENT(mm_vmscan_direct_reclaim_begin_template, mm_vmscan_direct_reclaim_begin,\n--\ninclude/trace/events/vmscan.h-209-\ninclude/trace/events/vmscan.h:210:#ifdef CONFIG_MEMCG\ninclude/trace/events/vmscan.h-211-DEFINE_EVENT(mm_vmscan_direct_reclaim_begin_template, mm_vmscan_memcg_reclaim_begin,\n--\ninclude/trace/events/vmscan.h=249=DEFINE_EVENT(mm_vmscan_direct_reclaim_end_template, mm_vmscan_direct_reclaim_end,\n--\ninclude/trace/events/vmscan.h-255-\ninclude/trace/events/vmscan.h:256:#ifdef CONFIG_MEMCG\ninclude/trace/events/vmscan.h-257-DEFINE_EVENT(mm_vmscan_direct_reclaim_end_template, mm_vmscan_memcg_reclaim_end,\n--\nkernel/bpf/memalloc.c=160=static struct mem_cgroup *get_memcg(const struct bpf_mem_cache *c)\nkernel/bpf/memalloc.c-161-{\nkernel/bpf/memalloc.c:162:#ifdef CONFIG_MEMCG\nkernel/bpf/memalloc.c-163-\tif (c-\u003eobjcg)\n--\nkernel/bpf/memalloc.c=502=int bpf_mem_alloc_init(struct bpf_mem_alloc *ma, int size, bool percpu)\n--\nkernel/bpf/memalloc.c-525-\nkernel/bpf/memalloc.c:526:#ifdef CONFIG_MEMCG\nkernel/bpf/memalloc.c-527-\t\tif (memcg_bpf_enabled())\n--\nkernel/bpf/memalloc.c-547-\t\treturn -ENOMEM;\nkernel/bpf/memalloc.c:548:#ifdef CONFIG_MEMCG\nkernel/bpf/memalloc.c-549-\tobjcg = get_obj_cgroup_from_current();\n--\nkernel/bpf/syscall.c=466=void bpf_map_free_id(struct bpf_map *map)\n--\nkernel/bpf/syscall.c-485-\nkernel/bpf/syscall.c:486:#ifdef CONFIG_MEMCG\nkernel/bpf/syscall.c-487-static void bpf_map_save_memcg(struct bpf_map *map)\n--\nkernel/bpf/verifier.c=5637=BTF_TYPE_SAFE_RCU_OR_NULL(struct mm_struct) {\nkernel/bpf/verifier.c-5638-\tstruct file __rcu *exe_file;\nkernel/bpf/verifier.c:5639:#ifdef CONFIG_MEMCG\nkernel/bpf/verifier.c-5640-\tstruct task_struct __rcu *owner;\n--\nkernel/exit.c=429=static void coredump_task_exit(struct task_struct *tsk,\n--\nkernel/exit.c-454-\nkernel/exit.c:455:#ifdef CONFIG_MEMCG\nkernel/exit.c-456-/* drops tasklist_lock if succeeds */\n--\nkernel/fork.c=914=static struct task_struct *dup_task_struct(struct task_struct *orig, int node)\n--\nkernel/fork.c-998-\nkernel/fork.c:999:#ifdef CONFIG_MEMCG\nkernel/fork.c-1000-\ttsk-\u003eactive_memcg = NULL;\n--\nkernel/fork.c=1052=static __always_inline void mm_clear_owner(struct mm_struct *mm,\n--\nkernel/fork.c-1054-{\nkernel/fork.c:1055:#ifdef CONFIG_MEMCG\nkernel/fork.c-1056-\tif (mm-\u003eowner == p)\n--\nkernel/fork.c=1061=static void mm_init_owner(struct mm_struct *mm, struct task_struct *p)\nkernel/fork.c-1062-{\nkernel/fork.c:1063:#ifdef CONFIG_MEMCG\nkernel/fork.c-1064-\tmm-\u003eowner = p;\n--\nmm/damon/sysfs-common.c=106=static bool damon_sysfs_memcg_path_eq(struct mem_cgroup *memcg,\n--\nmm/damon/sysfs-common.c-108-{\nmm/damon/sysfs-common.c:109:#ifdef CONFIG_MEMCG\nmm/damon/sysfs-common.c-110-\tcgroup_path(memcg-\u003ecss.cgroup, memcg_path_buf, PATH_MAX);\n--\nmm/debug.c=70=static void __dump_folio(const struct folio *folio, const struct page *page,\n--\nmm/debug.c-96-\nmm/debug.c:97:#ifdef CONFIG_MEMCG\nmm/debug.c-98-\tif (folio-\u003ememcg_data)\n--\nmm/debug.c=175=void dump_mm(const struct mm_struct *mm)\n--\nmm/debug.c-188-#endif\nmm/debug.c:189:#ifdef CONFIG_MEMCG\nmm/debug.c-190-\t\t\"owner %px \"\n--\nmm/debug.c-217-#endif\nmm/debug.c:218:#ifdef CONFIG_MEMCG\nmm/debug.c-219-\t\tmm-\u003eowner,\n--\nmm/folio.c=1061=void folio_batch_remove_exceptionals(struct folio_batch *fbatch)\n--\nmm/folio.c-1072-\nmm/folio.c:1073:#ifdef CONFIG_MEMCG\nmm/folio.c-1074-static void lruvec_reparent_lru(struct lruvec *child_lruvec,\n--\nmm/huge_memory.c=3642=static void __split_folio_to_order(struct folio *folio, int old_order,\n--\nmm/huge_memory.c-3744-\t\t\tfolio_set_idle(new_folio);\nmm/huge_memory.c:3745:#ifdef CONFIG_MEMCG\nmm/huge_memory.c-3746-\t\tnew_folio-\u003ememcg_data = folio-\u003ememcg_data;\n--\nmm/hwpoison-inject.c=45=static int hwpoison_filter_flags(struct page *p)\n--\nmm/hwpoison-inject.c-66- */\nmm/hwpoison-inject.c:67:#ifdef CONFIG_MEMCG\nmm/hwpoison-inject.c-68-static u64 hwpoison_filter_memcg;\n--\nmm/hwpoison-inject.c=162=static int __init pfn_inject_init(void)\n--\nmm/hwpoison-inject.c-191-\nmm/hwpoison-inject.c:192:#ifdef CONFIG_MEMCG\nmm/hwpoison-inject.c-193-\tdebugfs_create_u64(\"corrupt-filter-memcg\", 0600, hwpoison_dir,\n--\nmm/kfence/core.c=611=static unsigned long kfence_init_pool(void)\n--\nmm/kfence/core.c-638-\t\t__SetPageSlab(page);\nmm/kfence/core.c:639:#ifdef CONFIG_MEMCG\nmm/kfence/core.c-640-\t\tstruct slab *slab = page_slab(page);\n--\nmm/kfence/core.c-706-\t\tpage = pfn_to_page(start_pfn + i);\nmm/kfence/core.c:707:#ifdef CONFIG_MEMCG\nmm/kfence/core.c-708-\t\tstruct slab *slab = page_slab(page);\n--\nmm/kfence/core.c=1247=void __kfence_free(void *addr)\n--\nmm/kfence/core.c-1250-\nmm/kfence/core.c:1251:#ifdef CONFIG_MEMCG\nmm/kfence/core.c-1252-\tKFENCE_WARN_ON(meta-\u003eobj_exts.objcg);\n--\nmm/kfence/kfence.h=59=struct kfence_metadata {\n--\nmm/kfence/kfence.h-104-\tu32 alloc_stack_hash __guarded_by(\u0026lock);\nmm/kfence/kfence.h:105:#ifdef CONFIG_MEMCG\nmm/kfence/kfence.h-106-\tstruct slabobj_ext obj_exts;\n--\nmm/list_lru.c=29=static inline void unlock_list_lru(struct list_lru_one *l, bool irq_off,\n--\nmm/list_lru.c-39-\nmm/list_lru.c:40:#ifdef CONFIG_MEMCG\nmm/list_lru.c-41-static LIST_HEAD(memcg_list_lrus);\n--\nmm/list_lru.c=413=unsigned long list_lru_walk_node(struct list_lru *lru, int nid,\n--\nmm/list_lru.c-421-\nmm/list_lru.c:422:#ifdef CONFIG_MEMCG\nmm/list_lru.c-423-\tif (*nr_to_walk \u003e 0 \u0026\u0026 list_lru_memcg_aware(lru)) {\n--\nmm/list_lru.c=451=static void init_one_lru(struct list_lru *lru, struct list_lru_one *l)\n--\nmm/list_lru.c-461-\nmm/list_lru.c:462:#ifdef CONFIG_MEMCG\nmm/list_lru.c-463-static struct list_lru_memcg *memcg_init_list_lru_one(struct list_lru *lru, gfp_t gfp)\n--\nmm/list_lru.c=664=int __list_lru_init(struct list_lru *lru, bool memcg_aware, struct shrinker *shrinker)\n--\nmm/list_lru.c-667-\nmm/list_lru.c:668:#ifdef CONFIG_MEMCG\nmm/list_lru.c-669-\tif (shrinker)\n--\nmm/list_lru.c=692=void list_lru_destroy(struct list_lru *lru)\n--\nmm/list_lru.c-703-\nmm/list_lru.c:704:#ifdef CONFIG_MEMCG\nmm/list_lru.c-705-\tlru-\u003eshrinker_id = -1;\n--\nmm/memcontrol-v1.h=24=struct mem_cgroup *mem_cgroup_private_id_get_online(struct mem_cgroup *memcg,\n--\nmm/memcontrol-v1.h-27-/* Cgroup v1-specific declarations */\nmm/memcontrol-v1.h:28:#ifdef CONFIG_MEMCG_V1\nmm/memcontrol-v1.h-29-\n--\nmm/memcontrol.c=215=static inline struct obj_cgroup *__memcg_reparent_objcgs(struct mem_cgroup *memcg,\n--\nmm/memcontrol.c-234-\nmm/memcontrol.c:235:#ifdef CONFIG_MEMCG_V1\nmm/memcontrol.c-236-static void __mem_cgroup_flush_stats(struct mem_cgroup *memcg, bool force);\n--\nmm/memcontrol.c=550=unsigned long lruvec_page_state_local(struct lruvec *lruvec,\n--\nmm/memcontrol.c-572-\nmm/memcontrol.c:573:#ifdef CONFIG_MEMCG_V1\nmm/memcontrol.c-574-static void __mod_memcg_lruvec_state(struct mem_cgroup_per_node *pn,\n--\nmm/memcontrol.c=598=static const unsigned int memcg_vm_event_stat[] = {\nmm/memcontrol.c:599:#ifdef CONFIG_MEMCG_V1\nmm/memcontrol.c-600-\tPGPGIN,\n--\nmm/memcontrol.c=832=static long memcg_state_val_in_pages(int idx, long val)\n--\nmm/memcontrol.c-847-\nmm/memcontrol.c:848:#ifdef CONFIG_MEMCG_V1\nmm/memcontrol.c-849-/*\n--\nmm/memcontrol.c=916=void mod_memcg_state(struct mem_cgroup *memcg, enum memcg_stat_item idx,\n--\nmm/memcontrol.c-928-\nmm/memcontrol.c:929:#ifdef CONFIG_MEMCG_V1\nmm/memcontrol.c-930-/* idx can be of type enum memcg_stat_item or node_stat_item. */\n--\nmm/memcontrol.c=1104=bool memcg_vm_event_item_valid(enum vm_event_item idx)\n--\nmm/memcontrol.c-1111-\nmm/memcontrol.c:1112:#ifdef CONFIG_MEMCG_V1\nmm/memcontrol.c-1113-unsigned long memcg_events_local(struct mem_cgroup *memcg, int event)\n--\nmm/memcontrol.c=1712=unsigned long memcg_page_state_output(struct mem_cgroup *memcg, int item)\n--\nmm/memcontrol.c-1717-\nmm/memcontrol.c:1718:#ifdef CONFIG_MEMCG_V1\nmm/memcontrol.c-1719-unsigned long memcg_page_state_local_output(struct mem_cgroup *memcg, int item)\n--\nmm/memcontrol.c=1738=static void memcg_stat_format(struct mem_cgroup *memcg, struct seq_buf *s)\n--\nmm/memcontrol.c-1784-\tfor (i = 0; i \u003c ARRAY_SIZE(memcg_vm_event_stat); i++) {\nmm/memcontrol.c:1785:#ifdef CONFIG_MEMCG_V1\nmm/memcontrol.c-1786-\t\tif (memcg_vm_event_stat[i] == PGPGIN ||\n--\nmm/memcontrol.c=1836=void mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg)\n--\nmm/memcontrol.c-1857-\t\t\tatomic_long_read(\u0026memcg-\u003ememory_events[MEMCG_SWAP_MAX]));\nmm/memcontrol.c:1858:#ifdef CONFIG_MEMCG_V1\nmm/memcontrol.c-1859-\telse {\n--\nmm/memcontrol.c=2858=static void commit_charge(struct folio *folio, struct obj_cgroup *objcg)\n--\nmm/memcontrol.c-2870-\nmm/memcontrol.c:2871:#ifdef CONFIG_MEMCG_NMI_SAFETY_REQUIRES_ATOMIC\nmm/memcontrol.c-2872-static inline void account_slab_nmi_safe(struct mem_cgroup *memcg,\n--\nmm/memcontrol.c=3090=struct obj_cgroup *get_obj_cgroup_from_folio(struct folio *folio)\n--\nmm/memcontrol.c-3100-\nmm/memcontrol.c:3101:#ifdef CONFIG_MEMCG_NMI_SAFETY_REQUIRES_ATOMIC\nmm/memcontrol.c-3102-static inline void account_kmem_nmi_safe(struct mem_cgroup *memcg, int val)\n--\nmm/memcontrol.c=4212=mem_cgroup_css_alloc(struct cgroup_subsys_state *parent_css)\n--\nmm/memcontrol.c-4233-\t\tpage_counter_init(\u0026memcg-\u003eswap, \u0026parent-\u003eswap, false);\nmm/memcontrol.c:4234:#ifdef CONFIG_MEMCG_V1\nmm/memcontrol.c-4235-\t\tWRITE_ONCE(memcg-\u003eswappiness, mem_cgroup_swappiness(parent));\n\n"
}

gemini-3.1-pro-preview

							input: 49464
							output: 35
							thoughts: 56

Here's my take on the thought process:

**Diving Deep into `vmscan.c`**

Okay, hold on a minute. I was just reviewing the memory management code, and I need to double-check something. I thought I remembered seeing `user_proactive_reclaim` defined in `mm/vmscan.c`, but without any conditional compilation based on the `CONFIG_MEMCG` setting. That seems... odd. I was sure that related features were guarded by that configuration flag. Let me quickly jump back into `mm/vmscan.c` and take another look around line 8036. I want to make absolutely certain I didn't misinterpret that. It's crucial to understand those interactions between the reclaim mechanisms and memory control groups, and any unexpected behavior without the `CONFIG_MEMCG` guard could indicate a problem or an oversight in the code.

{
  "File": "mm/vmscan.c",
  "FirstLine": 8020,
  "LineCount": 50
}

{
  "Contents": "8020:\t\treturn 0;\n8021:\t}\n8022:\t\n8023:\t#endif\n8024:\t\n8025:\tenum {\n8026:\t\tMEMORY_RECLAIM_SWAPPINESS = 0,\n8027:\t\tMEMORY_RECLAIM_SWAPPINESS_MAX,\n8028:\t\tMEMORY_RECLAIM_NULL,\n8029:\t};\n8030:\tstatic const match_table_t tokens = {\n8031:\t\t{ MEMORY_RECLAIM_SWAPPINESS, \"swappiness=%d\"},\n8032:\t\t{ MEMORY_RECLAIM_SWAPPINESS_MAX, \"swappiness=max\"},\n8033:\t\t{ MEMORY_RECLAIM_NULL, NULL },\n8034:\t};\n8035:\t\n8036:\tint user_proactive_reclaim(char *buf,\n8037:\t\t\t\t   struct mem_cgroup *memcg, pg_data_t *pgdat)\n8038:\t{\n8039:\t\tunsigned int nr_retries = MAX_RECLAIM_RETRIES;\n8040:\t\tunsigned long nr_to_reclaim, nr_reclaimed = 0;\n8041:\t\tint swappiness = -1;\n8042:\t\tchar *old_buf, *start;\n8043:\t\tsubstring_t args[MAX_OPT_ARGS];\n8044:\t\tgfp_t gfp_mask = GFP_KERNEL;\n8045:\t\n8046:\t\tif (!buf || (!memcg \u0026\u0026 !pgdat) || (memcg \u0026\u0026 pgdat))\n8047:\t\t\treturn -EINVAL;\n8048:\t\n8049:\t\tbuf = strstrip(buf);\n8050:\t\n8051:\t\told_buf = buf;\n8052:\t\tnr_to_reclaim = memparse(buf, \u0026buf) / PAGE_SIZE;\n8053:\t\tif (buf == old_buf)\n8054:\t\t\treturn -EINVAL;\n8055:\t\n8056:\t\tbuf = strstrip(buf);\n8057:\t\n8058:\t\twhile ((start = strsep(\u0026buf, \" \")) != NULL) {\n8059:\t\t\tif (!strlen(start))\n8060:\t\t\t\tcontinue;\n8061:\t\t\tswitch (match_token(start, tokens, args)) {\n8062:\t\t\tcase MEMORY_RECLAIM_SWAPPINESS:\n8063:\t\t\t\tif (match_int(\u0026args[0], \u0026swappiness))\n8064:\t\t\t\t\treturn -EINVAL;\n8065:\t\t\t\tif (swappiness \u003c MIN_SWAPPINESS ||\n8066:\t\t\t\t    swappiness \u003e MAX_SWAPPINESS)\n8067:\t\t\t\t\treturn -EINVAL;\n8068:\t\t\t\tbreak;\n8069:\t\t\tcase MEMORY_RECLAIM_SWAPPINESS_MAX:\n"
}

gemini-3.1-pro-preview

							input: 50501
							output: 35
							thoughts: 62

**Checking Memory Cgroup Freeing Function**

Okay, so I've confirmed the function in question *is* available. Now, I need to understand its context within the kernel. Let's see... the name `try_to_free_mem_cgroup_pages` definitely suggests memory cgroup interaction. My immediate thought is to check its definition and see if it's tied to the `CONFIG_MEMCG` configuration option. Knowing where it's defined will help me understand its scope. Let's start by finding it; the code path is `mm/vmscan.c`, likely around line 6933, as I recall. Now, let's see if this function is only compiled if memory cgroups are enabled, which I suspect it is.

{
  "File": "mm/vmscan.c",
  "FirstLine": 6920,
  "LineCount": 40
}

{
  "Contents": "6920:\t\t * if we don't reclaim here, the shrink_node from balance_pgdat\n6921:\t\t * will pick up pages from other mem cgroup's as well. We hack\n6922:\t\t * the priority and make it zero.\n6923:\t\t */\n6924:\t\tshrink_lruvec(lruvec, \u0026sc);\n6925:\t\n6926:\t\ttrace_mm_vmscan_memcg_softlimit_reclaim_end(sc.nr_reclaimed, memcg);\n6927:\t\n6928:\t\t*nr_scanned = sc.nr_scanned;\n6929:\t\n6930:\t\treturn sc.nr_reclaimed;\n6931:\t}\n6932:\t\n6933:\tunsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *memcg,\n6934:\t\t\t\t\t\t   unsigned long nr_pages,\n6935:\t\t\t\t\t\t   gfp_t gfp_mask,\n6936:\t\t\t\t\t\t   unsigned int reclaim_options,\n6937:\t\t\t\t\t\t   int *swappiness)\n6938:\t{\n6939:\t\tunsigned long nr_reclaimed;\n6940:\t\tunsigned int noreclaim_flag;\n6941:\t\tstruct scan_control sc = {\n6942:\t\t\t.nr_to_reclaim = max(nr_pages, SWAP_CLUSTER_MAX),\n6943:\t\t\t.proactive_swappiness = swappiness,\n6944:\t\t\t.gfp_mask = (current_gfp_context(gfp_mask) \u0026 GFP_RECLAIM_MASK) |\n6945:\t\t\t\t\t(GFP_HIGHUSER_MOVABLE \u0026 ~GFP_RECLAIM_MASK),\n6946:\t\t\t.reclaim_idx = MAX_NR_ZONES - 1,\n6947:\t\t\t.target_mem_cgroup = memcg,\n6948:\t\t\t.priority = DEF_PRIORITY,\n6949:\t\t\t.may_writepage = 1,\n6950:\t\t\t.may_unmap = 1,\n6951:\t\t\t.may_swap = !!(reclaim_options \u0026 MEMCG_RECLAIM_MAY_SWAP),\n6952:\t\t\t.proactive = !!(reclaim_options \u0026 MEMCG_RECLAIM_PROACTIVE),\n6953:\t\t};\n6954:\t\t/*\n6955:\t\t * Traverse the ZONELIST_FALLBACK zonelist of the current node to put\n6956:\t\t * equal pressure on all the nodes. This is based on the assumption that\n6957:\t\t * the reclaim does not bail out early.\n6958:\t\t */\n6959:\t\tstruct zonelist *zonelist = node_zonelist(numa_node_id(), sc.gfp_mask);\n"
}

gemini-3.1-pro-preview

							input: 51483
							output: 35
							thoughts: 47

Okay, let's see. My first thought is: **Decoding the `try_to_free_mem_cgroup_pages` Function**.  Hold on a second, isn't that `try_to_free_mem_cgroup_pages` function defined *inside* an `#ifdef CONFIG_MEMCG` preprocessor block?  That would mean it's only active if memory cgroups are enabled in the kernel config. I need to be sure about this, so I will double-check. I'm going to jump into `mm/vmscan.c` and take a look around line 6890, just to confirm my initial hunch.  Understanding that conditional compilation is crucial for me, given the modular nature of the kernel. This will likely provide key context for understanding how memory management and cgroups are integrated, and how that code path behaves under different configurations.

{
  "File": "mm/vmscan.c",
  "FirstLine": 6880,
  "LineCount": 20
}

{
  "Contents": "6880:\t\ttrace_mm_vmscan_direct_reclaim_begin(sc.gfp_mask, order, NULL);\n6881:\t\n6882:\t\tnr_reclaimed = do_try_to_free_pages(zonelist, \u0026sc);\n6883:\t\n6884:\t\ttrace_mm_vmscan_direct_reclaim_end(nr_reclaimed, NULL);\n6885:\t\tset_task_reclaim_state(current, NULL);\n6886:\t\n6887:\t\treturn nr_reclaimed;\n6888:\t}\n6889:\t\n6890:\t#ifdef CONFIG_MEMCG\n6891:\t\n6892:\t/* Only used by soft limit reclaim. Do not reuse for anything else. */\n6893:\tunsigned long mem_cgroup_shrink_node(struct mem_cgroup *memcg,\n6894:\t\t\t\t\t\t\tgfp_t gfp_mask, bool noswap,\n6895:\t\t\t\t\t\t\tpg_data_t *pgdat,\n6896:\t\t\t\t\t\t\tunsigned long *nr_scanned)\n6897:\t{\n6898:\t\tstruct lruvec *lruvec = mem_cgroup_lruvec(memcg, pgdat);\n6899:\t\tstruct scan_control sc = {\n"
}

gemini-3.1-pro-preview

							input: 52096
							output: 35
							thoughts: 230

**My Analysis of the MGLRU Patch**

Okay, so I've pinpointed that the crucial modifications are indeed within the `#ifdef CONFIG_MEMCG` block. That settles it; I need to add `MEMCG` to my `EnableConfigs` list. No question there.

Let's break this down. The patch's `WorthFuzzing` flag is set to true, and rightly so. The changes touch the Multi-Gen LRU (MGLRU) page reclaim logic – a core piece of the memory management subsystem. This includes alterations to how generation sequences increment, folio scanning and isolation, and the conditions for aging. These are functional modifications affecting reachable core kernel logic, which *definitely* justifies fuzzing.

My `FocusSymbols` are clearly defined: `try_to_free_pages`, `try_to_free_mem_cgroup_pages`, `user_proactive_reclaim`, and `shrink_all_memory`. And for `EnableConfigs`, I'll be including `LRU_GEN`, `LRU_GEN_ENABLED`, and now `MEMCG`.

Hold on a second... `shrink_all_memory`... that's ringing a bell. I need to be sure about that one. My initial assessment had it in the 'safe' list, so I need to check its context. Let me quickly cross-reference that against `mm/vmscan.c`, specifically around line 7731. Just to be completely certain I haven't missed any dependencies that would shift this into the 'safe' zone. Always good to double-check.

{
  "File": "mm/vmscan.c",
  "FirstLine": 7720,
  "LineCount": 20
}

{
  "Contents": "7720:\t}\n7721:\t\n7722:\t#ifdef CONFIG_HIBERNATION\n7723:\t/*\n7724:\t * Try to free `nr_to_reclaim' of memory, system-wide, and return the number of\n7725:\t * freed pages.\n7726:\t *\n7727:\t * Rather than trying to age LRUs the aim is to preserve the overall\n7728:\t * LRU order by reclaiming preferentially\n7729:\t * inactive \u003e active \u003e active referenced \u003e active mapped\n7730:\t */\n7731:\tunsigned long shrink_all_memory(unsigned long nr_to_reclaim)\n7732:\t{\n7733:\t\tstruct scan_control sc = {\n7734:\t\t\t.nr_to_reclaim = nr_to_reclaim,\n7735:\t\t\t.gfp_mask = GFP_HIGHUSER_MOVABLE,\n7736:\t\t\t.reclaim_idx = MAX_NR_ZONES - 1,\n7737:\t\t\t.priority = DEF_PRIORITY,\n7738:\t\t\t.may_writepage = 1,\n7739:\t\t\t.may_unmap = 1,\n"
}

gemini-3.1-pro-preview

							input: 53022
							output: 151
							thoughts: 184

**My Configuration Dependencies**

Okay, so I'm looking at this section, and it's definitely nestled within `#ifdef CONFIG_HIBERNATION`. That's good to know, but I don't think I need to explicitly include `HIBERNATION` in the `EnableConfigs` list. My reasoning is that the presence of `try_to_free_pages` and `user_proactive_reclaim` should be sufficient to get the code I need to run. So, my list will just include those: `try_to_free_pages`, `try_to_free_mem_cgroup_pages`, and `user_proactive_reclaim`.

Now, before I commit to that, let's just double-check for any other dependencies I might be missing. Ah, here we go, looking at `CONFIG_LRU_GEN`. I see that it depends on `MMU`, but that's a near certainty, as `MMU` is enabled by default on virtually all relevant architectures. And then `CONFIG_LRU_GEN_ENABLED` depends on `LRU_GEN`, so if `LRU_GEN` is there, the enabled version should be too. That seems straightforward enough: `LRU_GEN` and `LRU_GEN_ENABLED` should be all I need.

Alright, with that clarified, I'm ready to craft the response.

{
  "EnableConfigs": [
    "LRU_GEN",
    "LRU_GEN_ENABLED",
    "MEMCG"
  ],
  "FocusSymbols": [
    "try_to_free_pages",
    "try_to_free_mem_cgroup_pages",
    "user_proactive_reclaim"
  ],
  "Reasoning": "The patch modifies the Multi-Gen LRU (MGLRU) page reclaim logic in the core memory management subsystem. It changes how the minimum generation sequence is incremented, how folios are scanned and isolated, and the conditions for running aging. These are functional changes to reachable core kernel logic that should be fuzzed.",
  "WorthFuzzing": true
}

{
  "EnableConfigs": [
    "LRU_GEN",
    "LRU_GEN_ENABLED",
    "MEMCG"
  ],
  "FocusSymbols": [
    "try_to_free_pages",
    "try_to_free_mem_cgroup_pages",
    "user_proactive_reclaim"
  ],
  "Reasoning": "The patch modifies the Multi-Gen LRU (MGLRU) page reclaim logic in the core memory management subsystem. It changes how the minimum generation sequence is incremented, how folios are scanned and isolated, and the conditions for running aging. These are functional changes to reachable core kernel logic that should be fuzzed.",
  "WorthFuzzing": true
}

LLM Calls Summary:
Total Calls	Total Tokens	Avg Tokens	Total Duration (Seconds)	Avg Duration (Seconds)

Tool Calls Summary:
Total Calls	Total Duration (Seconds)	Avg Duration (Seconds)