page cache · Supported

Maintainers

• M Matthew Wilcox <willy@infradead.org>
• M Jan Kara <jack@suse.cz>

Paths

• F Documentation/filesystems/locking.rst
• F Documentation/filesystems/vfs.rst
• F include/linux/pagemap.h
• F include/linux/writeback.h
• F include/trace/events/filemap.h
• F include/trace/events/readahead.h
• F include/trace/events/writeback.h
• F mm/filemap.c
• F mm/page-writeback.c
• F mm/readahead.c
• F mm/truncate.c

Last 30 days

Most active threads (last 7 days)

• HOTtoday [PATCH v5 0/3] memcg,writeback: flush foreign bdev mappings separately
  2026-09-15 08:34 · 1 reply in 7d · Julian Sun <hidden>
• HOTtoday [PATCH v2 0/3] blk-cgroup: store blkcg in bio before blkcg_mutex conversion
  2026-09-13 06:55 · 1 reply in 7d · Yu Kuai <yukuai@kernel.org>
• COOLING4d [PATCH RFC v2 00/15] mm/mglru: frequency guided promotion (MGLRU-FG) and flag cleanup
  2026-09-11 11:45 · 1 reply in 7d · Kairui Song via B4 Relay <devnull+kasong.tencent.com@kernel.org>

Active reviewers (last 30 days)

• Tao Cui <hidden>
  2 attestations (2 Reviewed-by) · last on 2026-09-13

Recent patches

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

• DORMANTno replies [PATCH v5 3/3] writeback: record bdev targets in foreign writeback tracepoints
  2026-09-15 · Julian Sun <hidden>
• HOTtoday REVIEWED: 1 (0M) [PATCH v2 2/3] blk-cgroup: store blkcg in bio instead of blkg
  2026-09-13 · Yu Kuai <yukuai@kernel.org>
• COOLING4d [PATCH RFC v2 15/15] mm/mglru: make folio_test_workingset() work based on folio LRU refs
  2026-09-11 · Kairui Song via B4 Relay <devnull+kasong.tencent.com@kernel.org>
• WARM2d REVIEWED: 1 (0M) [PATCH 2/3] blk-cgroup: store blkcg in bio instead of blkg
  2026-08-23 · Yu Kuai <yukuai@kernel.org>
• COLD26d [RFC PATCH v3 2/3] blk-cgroup: store blkcg in bio instead of blkg
  2026-08-18 · Yu Kuai <yukuai@kernel.org>
• COLD32d [RFC PATCH v2 3/4] blk-cgroup: store blkcg in bio instead of blkg
  2026-08-11 · Yu Kuai <yukuai@kernel.org>
• COLD40d [RFC PATCH v1 2/3] blk-cgroup: store blkcg in bio instead of blkg
  2026-08-04 · Yu Kuai <yukuai@kernel.org>
• COOLING14d [PATCH RFC 11/15] mm/mglru: replace folio workinset check and update with new helper
  2026-08-03 · Kairui Song <kasong@tencent.com>
• COLD54d [RFC PATCH v1 06/17] blk-cgroup: support non-blocking bio association
  2026-07-04 · Yu Kuai <yukuai@kernel.org>
• STALE105d [PATCH v6 19/22] swap: simplify swapoff using virtual swap
  2026-05-05 · Nhat Pham <nphamcs@gmail.com>
• STALE113d [PATCH RFC] memcg: add per-cgroup dirty page controls (dirty_ratio, dirty_min)
  2026-05-01 · Alireza Haghdoost via B4 Relay <devnull+haghdoost.uber.com@kernel.org>
• STALE137d [PATCH v5 19/21] swap: simplify swapoff using virtual swap
  2026-03-20 · Nhat Pham <nphamcs@gmail.com>
• STALE179d [PATCH v4 19/21] swap: simplify swapoff using virtual swap
  2026-03-18 · Nhat Pham <nphamcs@gmail.com>
• STALE161d LANDED: 14 (13M) [PATCH v6 10/33] writeback: prevent memory cgroup release in writeback module
  2026-03-05 · Qi Zheng <qi.zheng@linux.dev>
• STALE193d [PATCH v2 4/4] folio_batch: Rename PAGEVEC_SIZE to FOLIO_BATCH_SIZE
  2026-02-25 · Tal Zussman <hidden>
• STALE193d [PATCH v2 3/4] folio_batch: Rename pagevec.h to folio_batch.h
  2026-02-25 · Tal Zussman <hidden>
• STALE194d REVIEWED: 14 (13M) [PATCH v5 10/32] writeback: prevent memory cgroup release in writeback module
  2026-02-25 · Qi Zheng <qi.zheng@linux.dev>
• STALE212d REVIEWED: 14 (13M) [PATCH v4 10/31] writeback: prevent memory cgroup release in writeback module
  2026-02-05 · Qi Zheng <qi.zheng@linux.dev>
• STALE225d REVIEWED: 14 (13M) [PATCH v3 10/30] writeback: prevent memory cgroup release in writeback module
  2026-01-14 · Qi Zheng <qi.zheng@linux.dev>
• STALE244d REVIEWED: 1 (0M) [PATCH v2 10/28] writeback: prevent memory cgroup release in writeback module
  2025-12-17 · Qi Zheng <qi.zheng@linux.dev>
• STALE215d [PATCH 4/4] memcg: remove __lruvec_stat_mod_folio
  2025-11-10 · Shakeel Butt <shakeel.butt@linux.dev>
• STALE287d [PATCH v1 09/26] writeback: prevent memory cgroup release in writeback module
  2025-10-28 · Qi Zheng <qi.zheng@linux.dev>
• STALE222d [RFC PATCH v1 09/37] KVM: guest_memfd: Skip LRU for guest_memfd folios
  2025-10-17 · Ackerley Tng <hidden>
• STALE355d Re: [External] Re: [PATCH v2 2/2] memcg: Don't trigger hung task warnings when memcg is releasing resources.
  2025-09-24 · Julian Sun <hidden>
• STALE433d [PATCH RFC 13/28] writeback: prevent memory cgroup release in writeback module
  2025-04-15 · Muchun Song <hidden>
• STALE673d REVIEWED: 3 (3M) [PATCH v3 17/28] convert cachestat(2)
  2024-11-02 · Al Viro <viro@zeniv.linux.org.uk>
• STALE673d REVIEWED: 3 (3M) [PATCH v3 14/28] fdget(), trivial conversions
  2024-11-02 · Al Viro <viro@zeniv.linux.org.uk>
• STALE679d [PATCH v1 6/6] memcg-v1: remove memcg move locking code
  2024-10-25 · Shakeel Butt <shakeel.butt@linux.dev>
• STALE679d [PATCH v1 4/6] memcg-v1: no need for memcg locking for writeback tracking
  2024-10-25 · Shakeel Butt <shakeel.butt@linux.dev>
• STALE679d [PATCH v1 3/6] memcg-v1: no need for memcg locking for dirty tracking
  2024-10-25 · Shakeel Butt <shakeel.butt@linux.dev>

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.

• STALE179d [PATCH v4 19/21] swap: simplify swapoff using virtual swap
  2026-03-18 · Nhat Pham <nphamcs@gmail.com>
• STALE137d [PATCH v5 19/21] swap: simplify swapoff using virtual swap
  2026-03-20 · Nhat Pham <nphamcs@gmail.com>
• STALE105d [PATCH v6 19/22] swap: simplify swapoff using virtual swap
  2026-05-05 · Nhat Pham <nphamcs@gmail.com>
• COOLING14d [PATCH RFC 11/15] mm/mglru: replace folio workinset check and update with new helper
  2026-08-03 · Kairui Song <kasong@tencent.com>
• COLD32d [RFC PATCH v2 3/4] blk-cgroup: store blkcg in bio instead of blkg
  2026-08-11 · Yu Kuai <yukuai@kernel.org>