AI Trajectory


Trajectory: (Expand/Collapse All)
Seq Timestamp Type Name Duration
0/0 2026/07/15 00:09 flow patch-triage
0m Args: 
null

Results: 
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies Documentation/ABI/testing/sysfs-kernel-mm-damon, which is purely documentation. There are no functional changes to the kernel code.",
  "WorthFuzzing": false
}
1/1 2026/07/15 00:09 action read-patch-diff
0m Args: 
null

Results: 
{
  "PatchDiff": "commit 7fd58cf9923b9773859ff333a86d40c9667d3f71\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Wed Jul 15 00:09:33 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/Documentation/ABI/testing/sysfs-kernel-mm-damon b/Documentation/ABI/testing/sysfs-kernel-mm-damon\nindex 907a504fb64c54..e675a57145e36d 100644\n--- a/Documentation/ABI/testing/sysfs-kernel-mm-damon\n+++ b/Documentation/ABI/testing/sysfs-kernel-mm-damon\n@@ -36,7 +36,10 @@ Description:\tWriting 'on' or 'off' to this file makes the kdamond starts or\n \t\tkdamond.  Writing 'clear_schemes_tried_regions' to the file\n \t\tremoves contents of the 'tried_regions' directory.  Writing\n \t\t'update_schemes_effective_quotas' to the file updates\n-\t\t'.../quotas/effective_bytes' files of this kdamond.\n+\t\t'.../quotas/effective_bytes' files of this kdamond.  Writing\n+\t\t'update_tuned_intervals' to the file updates 'sample_us' and\n+\t\t'aggr_us' files under 'monitoring_attrs/intervals' with the\n+\t\tauto-tuned sampling and aggregation intervals.\n \n What:\t\t/sys/kernel/mm/damon/admin/kdamonds/\u003cK\u003e/pid\n Date:\t\tMar 2022\n@@ -112,7 +115,7 @@ Description:\tWriting a value to this file sets the update interval of the\n \t\tDAMON context in microseconds as the value.  Reading this file\n \t\treturns the value.\n \n-What:\t\t/sys/kernel/mm/damon/admin/kdamonds/\u003cK\u003e/contexts/\u003cC\u003e/monitoring_attrs/intervals/intrvals_goal/access_bp\n+What:\t\t/sys/kernel/mm/damon/admin/kdamonds/\u003cK\u003e/contexts/\u003cC\u003e/monitoring_attrs/intervals/intervals_goal/access_bp\n Date:\t\tFeb 2025\n Contact:\tSJ Park \u003csj@kernel.org\u003e\n Description:\tWriting a value to this file sets the monitoring intervals\n@@ -120,7 +123,7 @@ Description:\tWriting a value to this file sets the monitoring intervals\n \t\tthe given time interval (aggrs in same directory), in bp\n \t\t(1/10,000).  Reading this file returns the value.\n \n-What:\t\t/sys/kernel/mm/damon/admin/kdamonds/\u003cK\u003e/contexts/\u003cC\u003e/monitoring_attrs/intervals/intrvals_goal/aggrs\n+What:\t\t/sys/kernel/mm/damon/admin/kdamonds/\u003cK\u003e/contexts/\u003cC\u003e/monitoring_attrs/intervals/intervals_goal/aggrs\n Date:\t\tFeb 2025\n Contact:\tSJ Park \u003csj@kernel.org\u003e\n Description:\tWriting a value to this file sets the time interval to achieve\n@@ -128,14 +131,14 @@ Description:\tWriting a value to this file sets the time interval to achieve\n \t\taccess events ratio (access_bp in same directory) within.\n \t\tReading this file returns the value.\n \n-What:\t\t/sys/kernel/mm/damon/admin/kdamonds/\u003cK\u003e/contexts/\u003cC\u003e/monitoring_attrs/intervals/intrvals_goal/min_sample_us\n+What:\t\t/sys/kernel/mm/damon/admin/kdamonds/\u003cK\u003e/contexts/\u003cC\u003e/monitoring_attrs/intervals/intervals_goal/min_sample_us\n Date:\t\tFeb 2025\n Contact:\tSJ Park \u003csj@kernel.org\u003e\n Description:\tWriting a value to this file sets the minimum value of\n \t\tauto-tuned sampling interval in microseconds.  Reading this\n \t\tfile returns the value.\n \n-What:\t\t/sys/kernel/mm/damon/admin/kdamonds/\u003cK\u003e/contexts/\u003cC\u003e/monitoring_attrs/intervals/intrvals_goal/max_sample_us\n+What:\t\t/sys/kernel/mm/damon/admin/kdamonds/\u003cK\u003e/contexts/\u003cC\u003e/monitoring_attrs/intervals/intervals_goal/max_sample_us\n Date:\t\tFeb 2025\n Contact:\tSJ Park \u003csj@kernel.org\u003e\n Description:\tWriting a value to this file sets the maximum value of\n@@ -144,7 +147,7 @@ Description:\tWriting a value to this file sets the maximum value of\n \n What:\t\t/sys/kernel/mm/damon/admin/kdamonds/\u003cK\u003e/contexts/\u003cC\u003e/monitoring_attrs/nr_regions/min\n \n-WDate:\t\tMar 2022\n+Date:\t\tMar 2022\n Contact:\tSJ Park \u003csj@kernel.org\u003e\n Description:\tWriting a value to this file sets the minimum number of\n \t\tmonitoring regions of the DAMON context as the value.  Reading\n@@ -287,7 +290,7 @@ Description:\tWriting to and reading from this file sets and gets the maximum\n What:\t\t/sys/kernel/mm/damon/admin/kdamonds/\u003cK\u003e/contexts/\u003cC\u003e/schemes/\u003cS\u003e/access_pattern/nr_accesses/min\n Date:\t\tMar 2022\n Contact:\tSJ Park \u003csj@kernel.org\u003e\n-Description:\tWriting to and reading from this file sets and gets the manimum\n+Description:\tWriting to and reading from this file sets and gets the minimum\n \t\t'nr_accesses' of the scheme's target regions.\n \n What:\t\t/sys/kernel/mm/damon/admin/kdamonds/\u003cK\u003e/contexts/\u003cC\u003e/schemes/\u003cS\u003e/access_pattern/nr_accesses/max\n@@ -647,3 +650,15 @@ Contact:\tSJ Park \u003csj@kernel.org\u003e\n Description:\tReading this file returns the size of the memory in the region\n \t\tthat passed DAMON operations layer-handled filters of the\n \t\tscheme in bytes.\n+\n+What:\t\t/sys/kernel/mm/damon/admin/kdamonds/\u003cK\u003e/contexts/\u003cC\u003e/schemes/\u003cS\u003e/tried_regions/\u003cR\u003e/probes/\n+Date:\t\tMay 2026\n+Contact:\tSJ Park \u003csj@kernel.org\u003e\n+Description:\tDirectory for DAMON data-attribute monitoring probes of the\n+\t\tregion.\n+\n+What:\t\t/sys/kernel/mm/damon/admin/kdamonds/\u003cK\u003e/contexts/\u003cC\u003e/schemes/\u003cS\u003e/tried_regions/\u003cR\u003e/probes/\u003cP\u003e/hits\n+Date:\t\tMay 2026\n+Contact:\tSJ Park \u003csj@kernel.org\u003e\n+Description:\tReading this file returns the number of data-attribute\n+\t\tmonitoring probe-hit positive samples of the region.\n"
}
2/1 2026/07/15 00:09 agent patch-evaluator
0m Model: 
gemini-3.1-pro-preview

Args: 
null

Results: 
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies Documentation/ABI/testing/sysfs-kernel-mm-damon, which is purely documentation. There are no functional changes to the kernel code.",
  "WorthFuzzing": false
}

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).

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.
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.
   Do not list too generic configs (we already have them enabled). Only list those that
   specifically cover the modified code. 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 7fd58cf9923b9773859ff333a86d40c9667d3f71
Author: syz-cluster <triage@syzkaller.com>
Date:   Wed Jul 15 00:09:33 2026 +0000

    syz-cluster: applied patch under review

diff --git a/Documentation/ABI/testing/sysfs-kernel-mm-damon b/Documentation/ABI/testing/sysfs-kernel-mm-damon
index 907a504fb64c54..e675a57145e36d 100644
--- a/Documentation/ABI/testing/sysfs-kernel-mm-damon
+++ b/Documentation/ABI/testing/sysfs-kernel-mm-damon
@@ -36,7 +36,10 @@ Description:	Writing 'on' or 'off' to this file makes the kdamond starts or
 		kdamond.  Writing 'clear_schemes_tried_regions' to the file
 		removes contents of the 'tried_regions' directory.  Writing
 		'update_schemes_effective_quotas' to the file updates
-		'.../quotas/effective_bytes' files of this kdamond.
+		'.../quotas/effective_bytes' files of this kdamond.  Writing
+		'update_tuned_intervals' to the file updates 'sample_us' and
+		'aggr_us' files under 'monitoring_attrs/intervals' with the
+		auto-tuned sampling and aggregation intervals.
 
 What:		/sys/kernel/mm/damon/admin/kdamonds/<K>/pid
 Date:		Mar 2022
@@ -112,7 +115,7 @@ Description:	Writing a value to this file sets the update interval of the
 		DAMON context in microseconds as the value.  Reading this file
 		returns the value.
 
-What:		/sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/monitoring_attrs/intervals/intrvals_goal/access_bp
+What:		/sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/monitoring_attrs/intervals/intervals_goal/access_bp
 Date:		Feb 2025
 Contact:	SJ Park <sj@kernel.org>
 Description:	Writing a value to this file sets the monitoring intervals
@@ -120,7 +123,7 @@ Description:	Writing a value to this file sets the monitoring intervals
 		the given time interval (aggrs in same directory), in bp
 		(1/10,000).  Reading this file returns the value.
 
-What:		/sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/monitoring_attrs/intervals/intrvals_goal/aggrs
+What:		/sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/monitoring_attrs/intervals/intervals_goal/aggrs
 Date:		Feb 2025
 Contact:	SJ Park <sj@kernel.org>
 Description:	Writing a value to this file sets the time interval to achieve
@@ -128,14 +131,14 @@ Description:	Writing a value to this file sets the time interval to achieve
 		access events ratio (access_bp in same directory) within.
 		Reading this file returns the value.
 
-What:		/sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/monitoring_attrs/intervals/intrvals_goal/min_sample_us
+What:		/sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/monitoring_attrs/intervals/intervals_goal/min_sample_us
 Date:		Feb 2025
 Contact:	SJ Park <sj@kernel.org>
 Description:	Writing a value to this file sets the minimum value of
 		auto-tuned sampling interval in microseconds.  Reading this
 		file returns the value.
 
-What:		/sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/monitoring_attrs/intervals/intrvals_goal/max_sample_us
+What:		/sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/monitoring_attrs/intervals/intervals_goal/max_sample_us
 Date:		Feb 2025
 Contact:	SJ Park <sj@kernel.org>
 Description:	Writing a value to this file sets the maximum value of
@@ -144,7 +147,7 @@ Description:	Writing a value to this file sets the maximum value of
 
 What:		/sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/monitoring_attrs/nr_regions/min
 
-WDate:		Mar 2022
+Date:		Mar 2022
 Contact:	SJ Park <sj@kernel.org>
 Description:	Writing a value to this file sets the minimum number of
 		monitoring regions of the DAMON context as the value.  Reading
@@ -287,7 +290,7 @@ Description:	Writing to and reading from this file sets and gets the maximum
 What:		/sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/access_pattern/nr_accesses/min
 Date:		Mar 2022
 Contact:	SJ Park <sj@kernel.org>
-Description:	Writing to and reading from this file sets and gets the manimum
+Description:	Writing to and reading from this file sets and gets the minimum
 		'nr_accesses' of the scheme's target regions.
 
 What:		/sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/access_pattern/nr_accesses/max
@@ -647,3 +650,15 @@ Contact:	SJ Park <sj@kernel.org>
 Description:	Reading this file returns the size of the memory in the region
 		that passed DAMON operations layer-handled filters of the
 		scheme in bytes.
+
+What:		/sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/tried_regions/<R>/probes/
+Date:		May 2026
+Contact:	SJ Park <sj@kernel.org>
+Description:	Directory for DAMON data-attribute monitoring probes of the
+		region.
+
+What:		/sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/tried_regions/<R>/probes/<P>/hits
+Date:		May 2026
+Contact:	SJ Park <sj@kernel.org>
+Description:	Reading this file returns the number of data-attribute
+		monitoring probe-hit positive samples of the region.

3/2 2026/07/15 00:09 llm patch-evaluator
0m Model: 
gemini-3.1-pro-preview

Args: 
null

Results: 
null

Tokens: 
							input: 3225
							output: 66
							thoughts: 75

Thoughts: 
**DAMON Documentation Patch Review**

Okay, so I've just reviewed this patch that's touching the `Documentation/ABI/testing/sysfs-kernel-mm-damon` file. From what I can see, it's pretty straightforward – fixing a few typos and adding some much-needed documentation for the sysfs files associated with DAMON. Nothing earth-shattering.

Crucially, though, the modifications are solely within the `Documentation/` directory. This means there's absolutely no functional code being altered within the kernel itself. No new features, no bug fixes that *could* introduce subtle vulnerabilities, nothing that warrants a fuzzing run. Therefore, I’m going to confidently return `WorthFuzzing=false`. It's a documentation-only change, so we're good to go. Let's keep the fuzzing efforts focused on areas that could actually benefit from it.

4/2 2026/07/15 00:09 tool set-results
0m Args: 
{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies Documentation/ABI/testing/sysfs-kernel-mm-damon, which is purely documentation. There are no functional changes to the kernel code.",
  "WorthFuzzing": false
}

Results: 
{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies Documentation/ABI/testing/sysfs-kernel-mm-damon, which is purely documentation. There are no functional changes to the kernel code.",
  "WorthFuzzing": false
}
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)