memory management - swap · Maintained

Maintainers

• M Andrew Morton <akpm@linux-foundation.org>
• M Chris Li <chrisl@kernel.org>
• M Kairui Song <kasong@tencent.com>
• R Kemeng Shi <shikemeng@huaweicloud.com>
• R Nhat Pham <nphamcs@gmail.com>
• R Baoquan He <baoquan.he@linux.dev>
• R Barry Song <baohua@kernel.org>
• R Youngjun Park <youngjun.park@lge.com>

Paths

• F Documentation/ABI/testing/sysfs-kernel-mm-swap
• F Documentation/mm/swap-table.rst
• F include/linux/swap.h
• F include/linux/swapfile.h
• F include/linux/swapops.h
• F mm/page_io.c
• F mm/swap.c
• F mm/swap.h
• F mm/swap_table.h
• F mm/swap_state.c
• F mm/swapfile.c

Last 30 days

Most active threads (last 7 days)

• HOTtoday [PATCH v9 00/41] guest_memfd: In-place conversion support
  2026-07-29 00:35 · 2 replies in 7d · Ackerley Tng <hidden>

Active reviewers (last 30 days)

• Johannes Weiner <hannes@cmpxchg.org>
  9 attestations (6 Acked-by, 3 Suggested-by) · last on 2026-07-08
• Barry Song <baohua@kernel.org>
  6 attestations (6 Suggested-by) · last on 2026-07-08
• Baoquan He <hidden>
  6 attestations (6 Suggested-by) · last on 2026-07-08
• Mike Rapoport (Microsoft) <rppt@kernel.org>
  6 attestations (3 Acked-by, 3 Reviewed-by) · last on 2026-07-08
• David Hildenbrand (Arm) <david@kernel.org>
  3 attestations (3 Acked-by) · last on 2026-07-08
• SeongJae Park <sj@kernel.org>
  3 attestations (3 Reviewed-by) · last on 2026-07-08
• Kairui Song <kasong@tencent.com>
  2 attestations (2 Reviewed-by) · last on 2026-07-08
• Matthew Wilcox <willy@infradead.org>
  1 attestation (1 Suggested-by) · last on 2026-07-08

Recent patches

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

• HOTtoday [PATCH v9 14/41] mm: swap: Introduce lru_add_drain_progressive()
  2026-07-29 · Ackerley Tng <hidden>
• HOTtoday [PATCH v9 15/41] KVM: guest_memfd: Handle lru_add fbatch refcounts during conversion safety check
  2026-07-29 · Ackerley Tng <hidden>
• DORMANTno replies IN LINUX-NEXT: 7 (7M) [PATCH v9 3/3] mm: move reclaim-internal declarations out of swap.h
  2026-07-08 · Jianyue Wu <hidden>
• COLD22d IN LINUX-NEXT: 24 (24M) [PATCH v9 1/3] mm/swap: colocate page-cluster sysctl with swap readahead
  2026-07-08 · Jianyue Wu <hidden>
• COLD21d IN LINUX-NEXT: 11 (11M) [PATCH v10 07/15] mm: preserve RWP marker across PTE rewrites
  2026-07-08 · Kiryl Shutsemau <hidden>
• COLD21d IN LINUX-NEXT: 12 (12M) [PATCH v10 03/15] mm: rename uffd-wp PTE accessors to uffd
  2026-07-08 · Kiryl Shutsemau <hidden>
• COLD19d [PATCH v3 11/26] mm/swapfile: Annotate static information into meminspect
  2026-07-08 · Mukesh Ojha <hidden>
• COLD22d REVIEWED: 7 (7M) [PATCH v8 3/3] mm: move reclaim-internal declarations out of swap.h
  2026-07-07 · Jianyue Wu <hidden>
• COLD22d REVIEWED: 24 (24M) [PATCH v8 1/3] mm/swap: colocate page-cluster sysctl with swap readahead
  2026-07-07 · Jianyue Wu <hidden>
• COLD24d REVIEWED: 11 (11M) [PATCH v9 07/15] mm: preserve RWP marker across PTE rewrites
  2026-07-06 · Kiryl Shutsemau <hidden>
• COLD24d REVIEWED: 12 (12M) [PATCH v9 03/15] mm: rename uffd-wp PTE accessors to uffd
  2026-07-06 · Kiryl Shutsemau <hidden>
• COLD23d REVIEWED: 7 (7M) [PATCH v7 3/3] mm: move reclaim-internal declarations out of swap.h
  2026-07-05 · Jianyue Wu <hidden>
• COLD23d REVIEWED: 22 (22M) [PATCH v7 1/3] mm/swap: colocate page-cluster sysctl with swap readahead
  2026-07-05 · Jianyue Wu <hidden>
• COLD27d REVIEWED: 11 (11M) [PATCH v8 07/15] mm: preserve RWP marker across PTE rewrites
  2026-07-03 · Kiryl Shutsemau <hidden>
• COLD27d REVIEWED: 12 (12M) [PATCH v8 03/15] mm: rename uffd-wp PTE accessors to uffd
  2026-07-03 · Kiryl Shutsemau <hidden>
• COLD29d REVIEWED: 7 (7M) [PATCH v6 3/3] mm: move reclaim-internal declarations out of swap.h
  2026-06-30 · Jianyue Wu <hidden>
• COLD29d REVIEWED: 15 (15M) [PATCH v6 1/3] mm/swap: colocate page-cluster sysctl with swap readahead
  2026-06-30 · Jianyue Wu <hidden>
• COLD30d REVIEWED: 7 (7M) [PATCH v5 3/3] mm: move reclaim-internal declarations out of swap.h
  2026-06-30 · Jianyue Wu <hidden>
• COLD30d REVIEWED: 15 (15M) [PATCH v5 1/3] mm/swap: colocate page-cluster sysctl with swap readahead
  2026-06-30 · Jianyue Wu <hidden>
• COLD31d REVIEWED: 11 (11M) [PATCH v7 07/15] mm: preserve RWP marker across PTE rewrites
  2026-06-29 · Kiryl Shutsemau <hidden>
• COLD31d REVIEWED: 12 (12M) [PATCH v7 03/15] mm: rename uffd-wp PTE accessors to uffd
  2026-06-29 · Kiryl Shutsemau <hidden>
• WARM3d REVIEWED: 1 (0M) [PATCH v8 18/46] KVM: guest_memfd: Handle lru_add fbatch refcounts during conversion safety check
  2026-06-19 · Ackerley Tng via B4 Relay <devnull+ackerleytng.google.com@kernel.org>
• COLD43d [PATCH 3/3] mm/swap: route slot free notifications through swap_ops
  2026-06-14 · Jianyue Wu <hidden>
• COLD43d [PATCH 2/3] mm/zram: handle swap read/write via swap_ops
  2026-06-14 · Jianyue Wu <hidden>
• COLD43d [PATCH 1/3] mm/page_io: let block drivers register custom swap I/O ops
  2026-06-14 · Jianyue Wu <hidden>
• COLD31d [PATCH v4 3/3] mm: move reclaim-internal declarations out of swap.h
  2026-06-03 · Jianyue Wu <hidden>
• COLD31d [PATCH v4 1/3] mm/swap: colocate page-cluster sysctl with swap readahead
  2026-06-03 · Jianyue Wu <hidden>
• COLD57d REVIEWED: 11 (11M) [PATCH v6 07/15] mm: preserve RWP marker across PTE rewrites
  2026-05-29 · "Kiryl Shutsemau (Meta)" <kas@kernel.org>
• COLD57d REVIEWED: 12 (12M) [PATCH v6 03/15] mm: rename uffd-wp PTE accessors to uffd
  2026-05-29 · "Kiryl Shutsemau (Meta)" <kas@kernel.org>
• COLD57d [RFC PATCH 5/5] mm, swap: add debugfs counters for vswap
  2026-05-28 · Nhat Pham <nphamcs@gmail.com>

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.

• COLD35d REVIEWED: 1 (0M) [PATCH v7 14/42] KVM: guest_memfd: Handle lru_add fbatch refcounts during conversion safety check
  2026-05-23 · Ackerley Tng <hidden> · 1 Reviewed-by
• WARM3d REVIEWED: 1 (0M) [PATCH v8 18/46] KVM: guest_memfd: Handle lru_add fbatch refcounts during conversion safety check
  2026-06-19 · Ackerley Tng via B4 Relay <devnull+ackerleytng.google.com@kernel.org> · 1 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.

• STALE196d [RFC PATCH v3 2/8] mm: constify oom_control, scan_control, and alloc_context nodemask
  2026-01-08 · Gregory Price <gourry@gourry.net>
• STALE70d [PATCH v2 10/25] mm/swapfile: Annotate static information into meminspect
  2026-03-10 · Mukesh Ojha <hidden>
• STALE132d [PATCH v4 01/21] mm/swap: decouple swap cache from physical swap infrastructure
  2026-03-18 · Nhat Pham <nphamcs@gmail.com>
• STALE132d [PATCH v4 02/21] swap: rearrange the swap header file
  2026-03-18 · Nhat Pham <nphamcs@gmail.com>
• STALE132d [PATCH v4 03/21] mm: swap: add an abstract API for locking out swapoff
  2026-03-18 · Nhat Pham <nphamcs@gmail.com>
• STALE132d [PATCH v4 05/21] mm/swap: add a new function to check if a swap entry is in swap cached.
  2026-03-18 · Nhat Pham <nphamcs@gmail.com>
• STALE132d [PATCH v4 06/21] mm: swap: add a separate type for physical swap slots
  2026-03-18 · Nhat Pham <nphamcs@gmail.com>
• STALE132d [PATCH v4 07/21] mm: create scaffolds for the new virtual swap implementation
  2026-03-18 · Nhat Pham <nphamcs@gmail.com>
• STALE132d [PATCH v4 08/21] zswap: prepare zswap for swap virtualization
  2026-03-18 · Nhat Pham <nphamcs@gmail.com>
• STALE132d [PATCH v4 10/21] swap: move swap cache to virtual swap descriptor
  2026-03-18 · Nhat Pham <nphamcs@gmail.com>