shrinker · Maintained

Maintainers

• M Andrew Morton <akpm@linux-foundation.org>
• M Dave Chinner <david@fromorbit.com>
• R Qi Zheng <qi.zheng@linux.dev>
• R Roman Gushchin <roman.gushchin@linux.dev>
• R Muchun Song <muchun.song@linux.dev>

Paths

• F Documentation/admin-guide/mm/shrinker_debugfs.rst
• F include/linux/list_lru.h
• F include/linux/shrinker.h
• F mm/list_lru.c
• F mm/shrinker.c
• F mm/shrinker_debug.c

Last 30 days

Most active threads (last 7 days)

• HOTtoday [PATCH v3 0/7] Prepare mutable list iterators to cache cursor state
  2026-06-22 04:16 · 1 reply in 7d · Kaitao Cheng <hidden>
• DORMANTno replies Linux 7.0.13
  2026-06-19 12:11 · 1 reply in 7d · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• COOLING4d Linux 6.18.36
  2026-06-19 12:10 · 1 reply in 7d · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• COOLING6d IN LINUX-NEXT [PATCH] mm: shrinker: fix NULL pointer dereference in debugfs
  2026-06-17 09:01 · 0 replies in 7d · Qi Zheng <qi.zheng@linux.dev>
• COOLING6d IN LINUX-NEXT [PATCH] mm: shrinker: fix shrinker_info teardown race with expansion
  2026-06-17 08:58 · 0 replies in 7d · Qi Zheng <qi.zheng@linux.dev>
• HOTtoday [PATCH v6 0/2] mm, drm/xe: Avoid reclaim/eviction loops under fragmentation
  2026-06-17 03:22 · 1 reply in 7d · Matthew Brost <matthew.brost@intel.com>

Active reviewers (last 30 days)

• David Hildenbrand (Arm) <david@kernel.org>
  6 attestations (6 Reviewed-by) · last on 2026-05-27
• Shakeel Butt <shakeel.butt@linux.dev>
  6 attestations (6 Acked-by) · last on 2026-05-27
• Lorenzo Stoakes (Oracle) <ljs@kernel.org>
  6 attestations (6 Reviewed-by) · last on 2026-05-27
• Liam R. Howlett (Oracle) <liam@infradead.org>
  5 attestations (5 Reviewed-by) · last on 2026-05-27
• Chris Mason <clm@fb.com>
  2 attestations (2 Reported-by) · last on 2026-06-01
• Zenghui Yu <hidden>
  1 attestation (1 Reported-by) · last on 2026-06-10
• Nhat Pham <nphamcs@gmail.com>
  1 attestation (1 Suggested-by) · last on 2026-06-10
• Usama Arif <hidden>
  1 attestation (1 Reported-by) · last on 2026-05-27

Recent patches

Most-recent 30 patches in this subsystem on lkml (capped at 30), ordered by date desc.

• HOTtoday [PATCH v3 3/7] mm: Use mutable list iterators
  2026-06-22 · Kaitao Cheng <hidden>
• COOLING4d Re: Linux 7.0.13
  2026-06-19 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• DORMANTno replies Re: Linux 6.18.36
  2026-06-19 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• COOLING6d IN LINUX-NEXT [PATCH] mm: shrinker: fix NULL pointer dereference in debugfs
  2026-06-17 · Qi Zheng <qi.zheng@linux.dev>
• COOLING6d IN LINUX-NEXT [PATCH] mm: shrinker: fix shrinker_info teardown race with expansion
  2026-06-17 · Qi Zheng <qi.zheng@linux.dev>
• HOTtoday [PATCH v6 1/2] mm: Introduce opportunistic_compaction concept to vmscan and shrinkers
  2026-06-17 · Matthew Brost <matthew.brost@intel.com>
• COOLING11d IN MM [PATCH] mm/shrinker: do not hold RCU lock in shrinker_debugfs_count_show()
  2026-06-10 · Shakeel Butt <shakeel.butt@linux.dev>
• COLD21d IN LINUX-NEXT [PATCH v2] mm/list_lru: drain before clearing xarray entry on reparent
  2026-06-01 · Shakeel Butt <shakeel.butt@linux.dev>
• COLD21d [PATCH] mm/list_lru: drain before clearing xarray entry on reparent
  2026-06-01 · Shakeel Butt <shakeel.butt@linux.dev>
• WARM3d IN MM: 31 (31M) [PATCH v5 7/9] mm: list_lru: introduce folio_memcg_list_lru_alloc()
  2026-05-27 · Johannes Weiner <hannes@cmpxchg.org>
• WARM3d IN MM: 41 (41M) [PATCH v5 6/9] mm: list_lru: introduce caller locking for additions and deletions
  2026-05-27 · Johannes Weiner <hannes@cmpxchg.org>
• WARM3d IN MM: 41 (41M) [PATCH v5 5/9] mm: list_lru: deduplicate lock_list_lru()
  2026-05-27 · Johannes Weiner <hannes@cmpxchg.org>
• WARM3d IN MM: 41 (41M) [PATCH v5 4/9] mm: list_lru: move list dead check to lock_list_lru_of_memcg()
  2026-05-27 · Johannes Weiner <hannes@cmpxchg.org>
• WARM3d IN MM: 41 (41M) [PATCH v5 3/9] mm: list_lru: deduplicate unlock_list_lru()
  2026-05-27 · Johannes Weiner <hannes@cmpxchg.org>
• WARM3d IN MM: 41 (41M) [PATCH v5 2/9] mm: list_lru: lock_list_lru_of_memcg() cannot return NULL if !skip_empty
  2026-05-27 · Johannes Weiner <hannes@cmpxchg.org>
• WARM3d IN MM [PATCH v5 1/9] mm: list_lru: fix set_shrinker_bit() call during race with cgroup deletion
  2026-05-27 · Johannes Weiner <hannes@cmpxchg.org>
• COLD27d REVIEWED: 31 (31M) [PATCH v4 6/8] mm: list_lru: introduce folio_memcg_list_lru_alloc()
  2026-05-21 · Johannes Weiner <hannes@cmpxchg.org>
• COLD27d REVIEWED: 31 (31M) [PATCH v4 5/8] mm: list_lru: introduce caller locking for additions and deletions
  2026-05-21 · Johannes Weiner <hannes@cmpxchg.org>
• COLD27d REVIEWED: 31 (31M) [PATCH v4 4/8] mm: list_lru: deduplicate lock_list_lru()
  2026-05-21 · Johannes Weiner <hannes@cmpxchg.org>
• COLD27d REVIEWED: 31 (31M) [PATCH v4 3/8] mm: list_lru: move list dead check to lock_list_lru_of_memcg()
  2026-05-21 · Johannes Weiner <hannes@cmpxchg.org>
• COLD27d REVIEWED: 31 (31M) [PATCH v4 2/8] mm: list_lru: deduplicate unlock_list_lru()
  2026-05-21 · Johannes Weiner <hannes@cmpxchg.org>
• COLD27d REVIEWED: 31 (31M) [PATCH v4 1/8] mm: list_lru: lock_list_lru_of_memcg() cannot return NULL if !skip_empty
  2026-05-21 · Johannes Weiner <hannes@cmpxchg.org>
• COLD40d IN MM [PATCH v2] mm/shrinker: simplify shrinker_memcg_alloc() using guard()
  2026-05-13 · wangxuewen <hidden>
• COLD35d [PATCH v1] mm/shrinker: simplify shrinker_memcg_alloc() using guard()
  2026-05-12 · wangxuewen <hidden>
• COLD43d IN MM [PATCH] mm/shrinker: avoid out-of-bounds read in set_shrinker_bit()
  2026-05-10 · David Carlier <hidden>
• COLD45d [PATCH v5 2/5] mm: Introduce opportunistic_compaction concept to vmscan and shrinkers
  2026-05-06 · Matthew Brost <matthew.brost@intel.com>
• COLD45d [PATCH v5 1/5] mm: Wire up order in shrink_control
  2026-05-06 · Matthew Brost <matthew.brost@intel.com>
• COLD46d [PATCH v4 1/6] mm: Wire up order in shrink_control
  2026-04-30 · Matthew Brost <matthew.brost@intel.com>
• COLD53d [PATCH v3 1/6] mm: Wire up order in shrink_control
  2026-04-30 · Matthew Brost <matthew.brost@intel.com>
• STALE77d Re: [PATCH v3 7/7] mm: switch deferred split shrinker to list_lru
  2026-04-06 · Johannes Weiner <hannes@cmpxchg.org>

Needs attention (review trailers in, no pickup)

Patches with review trailers that haven't landed in mainline and haven't been Acked by a maintainer. Oldest first.

• STALE68d REVIEWED: 1 (0M) [PATCH v2] mm/shrinker: Fix refcount leak in shrink_slab_memcg()
  2026-02-04 · Altan Hacigumus <hidden> · 1 Acked-by
• DORMANTno replies REVIEWED: 8 (7M) [PATCH v2] mm: Do not allocate shrinker info with cgroup.memory=nokmem
  2026-03-09 · Michal Koutný <mkoutny@suse.com> · 2 Reviewed-by, 1 Acked-by

Quiet for 30+ days

Patches with no review trailers and no replies. Either the author is heads-down elsewhere or these slipped through. Oldest first.

• STALE161d [PATCH 1/8] memcg: introduce private id API for in-kernel users
  2025-12-25 · Shakeel Butt <shakeel.butt@linux.dev>
• STALE161d [PATCH 3/8] memcg: mem_cgroup_get_from_ino() returns NULL on error
  2025-12-25 · Shakeel Butt <shakeel.butt@linux.dev>
• STALE161d [PATCH 4/8] memcg: use cgroup_id() instead of cgroup_ino() for memcg ID
  2025-12-25 · Shakeel Butt <shakeel.butt@linux.dev>
• STALE107d [PATCH 3/3] mm: shrinker: remove unnecessary check in shrink_slab_memcg()
  2026-03-06 · Haifeng Xu <hidden>
• STALE102d [PATCH V2 1/4] mm: shrinker: add one more parameter in shrinker_id()
  2026-03-10 · Haifeng Xu <hidden>
• STALE102d [PATCH V2 4/4] mm: shrinker: remove unnecessary check in shrink_slab_memcg()
  2026-03-10 · Haifeng Xu <hidden>
• COLD58d [PATCH V3 1/4] mm: shrinker: add one more parameter in shrinker_id()
  2026-03-11 · Haifeng Xu <hidden>
• COLD58d [PATCH V3 4/4] mm: shrinker: remove unnecessary check in shrink_slab_memcg()
  2026-03-11 · Haifeng Xu <hidden>
• STALE94d [LSF/MM/BPF TOPIC][RFC PATCH 1/2] mm: add hugepage shrinker for frozen memory
  2026-03-18 · Sourav Panda <hidden>
• COLD45d [PATCH v5 2/5] mm: Introduce opportunistic_compaction concept to vmscan and shrinkers
  2026-05-06 · Matthew Brost <matthew.brost@intel.com>