slab allocator · Maintained

Maintainers

• M Vlastimil Babka <vbabka@kernel.org>
• M Harry Yoo <harry@kernel.org>
• M Andrew Morton <akpm@linux-foundation.org>
• R Hao Li <hao.li@linux.dev>
• R Christoph Lameter <cl@gentwo.org>
• R David Rientjes <rientjes@google.com>
• R Roman Gushchin <roman.gushchin@linux.dev>

Paths

• F Documentation/admin-guide/mm/slab.rst
• F Documentation/mm/slab.rst
• F include/linux/mempool.h
• F include/linux/slab.h
• F lib/tests/slub_kunit.c
• F mm/failslab.c
• F mm/mempool.c
• F mm/slab.h
• F mm/slab_common.c
• F mm/slub.c
• F scripts/gdb/linux/slab.py
• F tools/cgroup/memcg_slabinfo.py
• F tools/include/linux/slab.h
• F tools/lib/slab.c
• F tools/mm/slabinfo-gnuplot.sh
• F tools/mm/slabinfo.c

Last 30 days

Active reviewers (last 30 days)

• Vlastimil Babka (SUSE) <vbabka@kernel.org>
  1 attestation (1 Suggested-by) · last on 2026-06-04

Recent patches

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

• COLD15d [PATCH 4/4] Documentation/mm: document SLUB previous lifetime tracking
  2026-06-16 · Pengpeng Hou <hidden>
• COLD15d [PATCH 1/4] mm/slub: factor user tracking metadata size calculation
  2026-06-16 · Pengpeng Hou <hidden>
• COLD15d [PATCH 2/4] mm/slub: preserve previous object lifetime in user tracking
  2026-06-16 · Pengpeng Hou <hidden>
• COLD15d [PATCH 3/4] mm/slub: test previous lifetime tracking
  2026-06-16 · Pengpeng Hou <hidden>
• COLD16d [RFC PATCH 4/5] Documentation/mm: document SLUB previous lifetime tracking
  2026-06-11 · Pengpeng Hou <hidden>
• COLD16d [RFC PATCH 2/5] mm/slub: add optional previous lifetime user tracking
  2026-06-11 · Pengpeng Hou <hidden>
• COLD16d [RFC PATCH 5/5] mm/slub: sanitize previous lifetime tracking flags
  2026-06-11 · Pengpeng Hou <hidden>
• COLD16d [RFC PATCH 3/5] mm/slub: print previous object lifetime in debug reports
  2026-06-11 · Pengpeng Hou <hidden>
• COLD16d [RFC PATCH 1/5] mm/slub: factor user tracking metadata size calculation
  2026-06-11 · Pengpeng Hou <hidden>
• COLD24d [PATCH v2] docs/mm/slab: document cache isolation with SLAB_NO_MERGE
  2026-06-07 · Mohammed EL Kadiri <hidden>
• COOLING6d [PATCH v3] mm/mempool: Untangle CONFIG_SLUB_DEBUG_ON abuse and switch to static key
  2026-06-04 · lirongqing <hidden>
• COLD30d [PATCH][v2] mm/mempool: Untangle CONFIG_SLUB_DEBUG_ON abuse and switch to static key
  2026-06-02 · lirongqing <hidden>
• COLD31d [PATCH] mm/mempool: use static key for boot-time debug enablement
  2026-05-27 · lirongqing <hidden>
• COLD36d [PATCH v4 4/4] slub: apply new pw_queue_on() interface
  2026-05-19 · Leonardo Bras <hidden>
• COLD43d Re: [PATCH v4 1/3] slab: support for compiler-assisted type-based slab cache partitioning
  2026-05-14 · "Vlastimil Babka (SUSE)" <vbabka@kernel.org>
• COLD51d Re: [PATCH v3 2/2] slab: fix kernel-docs for mm-api
  2026-05-04 · Marco Elver <elver@google.com>
• STALE73d [PATCH] docs: Add overview and SLUB allocator sections to slab documentation
  2026-04-18 · Nick Huang <hidden>
• STALE63d REVIEWED: 16 (15M) [PATCHv7 18/18] mm/slab: Use compound_head() in page_slab()
  2026-02-27 · "Kiryl Shutsemau (Meta)" <kas@kernel.org>
• STALE63d REVIEWED: 23 (21M) [PATCHv7 07/18] mm: Rework compound_head() for power-of-2 sizeof(struct page)
  2026-02-27 · "Kiryl Shutsemau (Meta)" <kas@kernel.org>
• STALE63d REVIEWED: 22 (21M) [PATCHv7 03/18] mm: Rename the 'compound_head' field in the 'struct page' to 'compound_info'
  2026-02-27 · "Kiryl Shutsemau (Meta)" <kas@kernel.org>
• STALE63d REVIEWED: 16 (15M) [PATCHv7 18/18] mm/slab: Use compound_head() in page_slab()
  2026-02-27 · "Kiryl Shutsemau (Meta)" <kas@kernel.org>
• STALE63d REVIEWED: 23 (21M) [PATCHv7 07/18] mm: Rework compound_head() for power-of-2 sizeof(struct page)
  2026-02-27 · "Kiryl Shutsemau (Meta)" <kas@kernel.org>
• STALE63d REVIEWED: 22 (21M) [PATCHv7 03/18] mm: Rename the 'compound_head' field in the 'struct page' to 'compound_info'
  2026-02-27 · "Kiryl Shutsemau (Meta)" <kas@kernel.org>
• STALE63d [PATCHv6 17/17] mm/slab: Use compound_head() in page_slab()
  2026-02-02 · Kiryl Shutsemau <kas@kernel.org>
• STALE63d REVIEWED: 6 (6M) [PATCHv6 07/17] mm: Rework compound_head() for power-of-2 sizeof(struct page)
  2026-02-02 · Kiryl Shutsemau <kas@kernel.org>
• STALE63d REVIEWED: 6 (6M) [PATCHv6 03/17] mm: Rename the 'compound_head' field in the 'struct page' to 'compound_info'
  2026-02-02 · Kiryl Shutsemau <kas@kernel.org>
• STALE153d [PATCHv5 17/17] mm/slab: Use compound_head() in page_slab()
  2026-01-28 · Kiryl Shutsemau <kas@kernel.org>
• STALE153d REVIEWED: 6 (6M) [PATCHv5 07/17] mm: Rework compound_head() for power-of-2 sizeof(struct page)
  2026-01-28 · Kiryl Shutsemau <kas@kernel.org>
• STALE153d REVIEWED: 6 (6M) [PATCHv5 03/17] mm: Rename the 'compound_head' field in the 'struct page' to 'compound_info'
  2026-01-28 · Kiryl Shutsemau <kas@kernel.org>
• STALE154d REVIEWED: 3 (3M) [PATCHv4 03/14] mm: Rename the 'compound_head' field in the 'struct page' to 'compound_info'
  2026-01-21 · Kiryl Shutsemau <kas@kernel.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.

• STALE163d REVIEWED: 3 (3M) [PATCHv3 04/15] mm: Rename the 'compound_head' field in the 'struct page' to 'compound_info'
  2026-01-15 · Kiryl Shutsemau <kas@kernel.org> · 1 Reviewed-by
• STALE154d REVIEWED: 3 (3M) [PATCHv4 03/14] mm: Rename the 'compound_head' field in the 'struct page' to 'compound_info'
  2026-01-21 · Kiryl Shutsemau <kas@kernel.org> · 1 Reviewed-by
• STALE153d REVIEWED: 6 (6M) [PATCHv5 03/17] mm: Rename the 'compound_head' field in the 'struct page' to 'compound_info'
  2026-01-28 · Kiryl Shutsemau <kas@kernel.org> · 2 Reviewed-by
• STALE153d REVIEWED: 6 (6M) [PATCHv5 07/17] mm: Rework compound_head() for power-of-2 sizeof(struct page)
  2026-01-28 · Kiryl Shutsemau <kas@kernel.org> · 2 Reviewed-by
• STALE63d REVIEWED: 6 (6M) [PATCHv6 03/17] mm: Rename the 'compound_head' field in the 'struct page' to 'compound_info'
  2026-02-02 · Kiryl Shutsemau <kas@kernel.org> · 2 Reviewed-by
• STALE63d REVIEWED: 6 (6M) [PATCHv6 07/17] mm: Rework compound_head() for power-of-2 sizeof(struct page)
  2026-02-02 · Kiryl Shutsemau <kas@kernel.org> · 2 Reviewed-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.

• STALE202d [PATCH 02/11] mm: Rename the 'compound_head' field in the 'struct page' to 'compound_info'
  2025-12-05 · Kiryl Shutsemau <kas@kernel.org>
• STALE167d [RFC PATCH v3 3/8] mm: restrict slub, compaction, and page_alloc to sysram
  2026-01-08 · Gregory Price <gourry@gourry.net>
• STALE153d [PATCHv5 17/17] mm/slab: Use compound_head() in page_slab()
  2026-01-28 · Kiryl Shutsemau <kas@kernel.org>