tmpfs (shmem filesystem) · Maintained

Maintainers

• M Hugh Dickins <hughd@google.com>
• R Baolin Wang <baolin.wang@linux.alibaba.com>

Paths

• F include/linux/memfd.h
• F include/linux/shmem_fs.h
• F mm/memfd.c
• F mm/shmem.c
• F mm/shmem_quota.c

Last 30 days

Active reviewers (last 30 days)

• Barry Song <baohua@kernel.org>
  3 attestations (3 Suggested-by) · last on 2026-07-08
• Baoquan He <hidden>
  3 attestations (3 Suggested-by) · last on 2026-07-08
• Johannes Weiner <hannes@cmpxchg.org>
  3 attestations (3 Acked-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.

• 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 REVIEWED: 7 (7M) [PATCH v8 3/3] mm: move reclaim-internal declarations out of swap.h
  2026-07-07 · Jianyue Wu <hidden>
• COLD23d REVIEWED: 7 (7M) [PATCH v7 3/3] mm: move reclaim-internal declarations out of swap.h
  2026-07-05 · Jianyue Wu <hidden>
• COLD29d REVIEWED: 7 (7M) [PATCH v6 3/3] mm: move reclaim-internal declarations out of swap.h
  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>
• COLD37d [PATCH v2 11/11] hugetlb: make hugetlb_[un]reserve_pages() to take PAGE granularity index
  2026-06-17 · Jane Chu <hidden>
• COLD37d [PATCH v2 08/11] hugetlb: make hugetlb_add_to_page_cache() to take PAGE_SIZE granularity index
  2026-06-17 · Jane Chu <hidden>
• COLD37d [PATCH v2 06/11] hugetlb: make hugetlb_fault_mutex_hash() to take PAGE_SIZE index
  2026-06-17 · Jane Chu <hidden>
• COLD31d [PATCH v4 3/3] mm: move reclaim-internal declarations out of swap.h
  2026-06-03 · Jianyue Wu <hidden>
• COLD58d [PATCH v6 19/22] swap: simplify swapoff using virtual swap
  2026-05-05 · Nhat Pham <nphamcs@gmail.com>
• COLD58d [PATCH v6 14/22] mm: swap: decouple virtual swap slot from backing store
  2026-05-05 · Nhat Pham <nphamcs@gmail.com>
• COLD58d [PATCH v6 13/22] swap: manage swap entry lifecycle at the virtual swap layer
  2026-05-05 · Nhat Pham <nphamcs@gmail.com>
• COLD58d [PATCH v6 10/22] swap: move swap cache to virtual swap descriptor
  2026-05-05 · Nhat Pham <nphamcs@gmail.com>
• COLD58d [PATCH v6 09/22] mm: swap: allocate a virtual swap slot for each swapped out page
  2026-05-05 · Nhat Pham <nphamcs@gmail.com>
• COLD58d [PATCH v6 06/22] mm: swap: add a separate type for physical swap slots
  2026-05-05 · Nhat Pham <nphamcs@gmail.com>
• COLD58d [PATCH v6 03/22] mm: swap: add an abstract API for locking out swapoff
  2026-05-05 · Nhat Pham <nphamcs@gmail.com>
• COLD58d [PATCH v6 01/22] mm/swap: decouple swap cache from physical swap infrastructure
  2026-05-05 · Nhat Pham <nphamcs@gmail.com>
• STALE94d [RFC, PATCH 06/12] userfaultfd: auto-resolve shmem and hugetlbfs minor faults in async mode
  2026-04-14 · "Kiryl Shutsemau (Meta)" <kas@kernel.org>
• STALE98d [PATCH 6/6] hugetlb: pass hugetlb reservation ranges in base-page indices
  2026-04-09 · Jane Chu <hidden>
• STALE98d [PATCH 3/6] hugetlb: make hugetlb_fault_mutex_hash() take PAGE_SIZE index
  2026-04-09 · Jane Chu <hidden>
• STALE98d [PATCH 5/6] hugetlb: make hugetlb_add_to_page_cache() use PAGE_SIZE-based index
  2026-04-09 · Jane Chu <hidden>
• STALE90d [PATCH v5 19/21] swap: simplify swapoff using virtual swap
  2026-03-20 · Nhat Pham <nphamcs@gmail.com>
• STALE90d [PATCH v5 14/21] mm: swap: decouple virtual swap slot from backing store
  2026-03-20 · Nhat Pham <nphamcs@gmail.com>
• STALE90d [PATCH v5 13/21] swap: manage swap entry lifecycle at the virtual swap layer
  2026-03-20 · Nhat Pham <nphamcs@gmail.com>
• STALE90d [PATCH v5 10/21] swap: move swap cache to virtual swap descriptor
  2026-03-20 · Nhat Pham <nphamcs@gmail.com>
• STALE90d [PATCH v5 09/21] mm: swap: allocate a virtual swap slot for each swapped out page
  2026-03-20 · Nhat Pham <nphamcs@gmail.com>
• STALE90d [PATCH v5 06/21] mm: swap: add a separate type for physical swap slots
  2026-03-20 · Nhat Pham <nphamcs@gmail.com>
• STALE90d [PATCH v5 03/21] mm: swap: add an abstract API for locking out swapoff
  2026-03-20 · Nhat Pham <nphamcs@gmail.com>
• STALE90d [PATCH v5 01/21] mm/swap: decouple swap cache from physical swap infrastructure
  2026-03-20 · Nhat Pham <nphamcs@gmail.com>
• STALE132d [PATCH v4 19/21] swap: simplify swapoff using virtual swap
  2026-03-18 · 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.

• STALE190d REVIEWED: 9 (9M) [PATCH v2 03/31] tmpfs: add EXPORT_OP_STABLE_HANDLES flag to export operations
  2026-01-19 · Jeff Layton <jlayton@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.

• 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 03/21] mm: swap: add an abstract API for locking out swapoff
  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 10/21] swap: move swap cache to virtual swap descriptor
  2026-03-18 · Nhat Pham <nphamcs@gmail.com>
• STALE132d [PATCH v4 13/21] swap: manage swap entry lifecycle at the virtual swap layer
  2026-03-18 · Nhat Pham <nphamcs@gmail.com>
• STALE132d [PATCH v4 14/21] mm: swap: decouple virtual swap slot from backing store
  2026-03-18 · Nhat Pham <nphamcs@gmail.com>
• STALE132d [PATCH v4 19/21] swap: simplify swapoff using virtual swap
  2026-03-18 · Nhat Pham <nphamcs@gmail.com>
• STALE90d [PATCH v5 01/21] mm/swap: decouple swap cache from physical swap infrastructure
  2026-03-20 · Nhat Pham <nphamcs@gmail.com>
• STALE90d [PATCH v5 03/21] mm: swap: add an abstract API for locking out swapoff
  2026-03-20 · Nhat Pham <nphamcs@gmail.com>
• STALE90d [PATCH v5 06/21] mm: swap: add a separate type for physical swap slots
  2026-03-20 · Nhat Pham <nphamcs@gmail.com>