Patch Series

Subject mm/slab: reduce slab accounting memory overhead by allocating slabobj_ext metadata within unsed slab space
Author harry.yoo@oracle.com
Date 2025-12-22 11:08:36 +0000 UTC
Version 1
Cc adilger.kernel@dilger.ca akpm@linux-foundation.org andreyknvl@gmail.com cgroups@vger.kernel.org cl@gentwo.org dvyukov@google.com glider@google.com hannes@cmpxchg.org hao.li@linux.dev harry.yoo@oracle.com linux-ext4@vger.kernel.org linux-kernel@vger.kernel.org linux-mm@kvack.org mhocko@kernel.org muchun.song@linux.dev rientjes@google.com roman.gushchin@linux.dev ryabinin.a.a@gmail.com shakeel.butt@linux.dev stable@vger.kernel.org surenb@google.com tytso@mit.edu vbabka@suse.cz vincenzo.frascino@arm.com yeoreum.yun@arm.com

Patches (8)

Name Content [All]
[PATCH V4 1/8] mm/slab: use unsigned long for orig_size to ensure proper metadata align [Body]
[PATCH V4 2/8] mm/slab: allow specifying free pointer offset when using constructor [Body]
[PATCH V4 3/8] ext4: specify the free pointer offset for ext4_inode_cache [Body]
[PATCH V4 4/8] mm/slab: abstract slabobj_ext access via new slab_obj_ext() helper [Body]
[PATCH V4 5/8] mm/slab: use stride to access slabobj_ext [Body]
[PATCH V4 6/8] mm/memcontrol,alloc_tag: handle slabobj_ext access under KASAN poison [Body]
[PATCH V4 7/8] mm/slab: save memory by allocating slabobj_ext array from leftover [Body]
[PATCH V4 8/8] mm/slab: place slabobj_ext metadata in unused space within s->size [Body]

Session 2025-12-22

ID (for dev) e9658dc8-ff70-4097-83c1-1bb96fa73f6c
Status finished
Triaged OK [Log]
Execution Log [Link]
Test Base Patched Verdict
[KASAN] Build Base c642ecda5b136882e518d8303863473c0d21ab2f [Config] passed [Log]
[KASAN] Boot test: Base c642ecda5b136882e518d8303863473c0d21ab2f [Config] passed [Log]
[KASAN] Build Patched c642ecda5b136882e518d8303863473c0d21ab2f [Config] [patched] passed [Log]
[KASAN] Boot test: Patched c642ecda5b136882e518d8303863473c0d21ab2f [Config] [patched] passed [Log]
[KASAN] Fuzzing c642ecda5b136882e518d8303863473c0d21ab2f [Config] c642ecda5b136882e518d8303863473c0d21ab2f [Config] [patched] passed [Log] [Artifacts]