locking primitives · Maintained

Maintainers

• M Peter Zijlstra <peterz@infradead.org>
• M Ingo Molnar <mingo@redhat.com>
• M Will Deacon <will@kernel.org>
• M Boqun Feng <boqun@kernel.org>
• R Waiman Long <longman@redhat.com>

Paths

• F Documentation/locking/
• F arch/*/include/asm/spinlock*.h
• F include/linux/local_lock*.h
• F include/linux/lockdep*.h
• F include/linux/mutex*.h
• F include/linux/rwlock*.h
• F include/linux/rwsem*.h
• F include/linux/seqlock.h
• F include/linux/spinlock*.h
• F kernel/locking/
• F lib/locking*.[ch]
• F rust/helpers/mutex.c
• F rust/helpers/spinlock.c
• F rust/kernel/sync/lock.rs
• F rust/kernel/sync/lock/
• F rust/kernel/sync/locked_by.rs
• X kernel/locking/locktorture.c

Last 30 days

Most active threads (last 7 days)

• WARM2d [PATCH v2 00/19] maple_tree: lock checking and clean ups
  2026-06-30 19:08 · 1 reply in 7d · "Liam R. Howlett (Oracle)" <liam@infradead.org>
• WARM3d [PATCH 00/18] maple_tree: lock checking and clean ups
  2026-06-29 14:42 · 1 reply in 7d · "Liam R. Howlett (Oracle)" <liam@infradead.org>

Active reviewers (last 30 days)

• Peter Zijlstra <peterz@infradead.org>
  2 attestations (2 Suggested-by) · last on 2026-06-30
• Paul E. McKenney <paulmck@kernel.org>
  1 attestation (1 Acked-by) · last on 2026-06-04
• Usama Arif <hidden>
  1 attestation (1 Acked-by) · last on 2026-06-04

Recent patches

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

• WARM2d [PATCH v2 02/19] locking/lockdep: Add sequence counter to held_lock
  2026-06-30 · "Liam R. Howlett (Oracle)" <liam@infradead.org>
• WARM3d [PATCH 02/18] locking/lockdep: Add sequence counter to held_lock
  2026-06-29 · "Liam R. Howlett (Oracle)" <liam@infradead.org>
• COLD20d REVIEWED: 8 (8M) [PATCH v7 3/3] locking: Add contended_release tracepoint to sleepable locks
  2026-06-04 · Dmitry Ilvokhin <hidden>
• COLD20d REVIEWED: 1 (0M) [PATCH v7 2/3] locking/percpu-rwsem: Extract __percpu_up_read()
  2026-06-04 · Dmitry Ilvokhin <hidden>
• COLD37d [PATCH v4 1/4] Introducing pw_lock() and per-cpu queue & flush work
  2026-05-19 · Leonardo Bras <hidden>
• DORMANTno replies [PATCH v3] locking/hqlock_core: restore missing call in contention detection logic
  2026-05-12 · Fedorov Nikita <hidden>
• COLD21d [PATCH v6 7/7] locking: Add contended_release tracepoint to qrwlock
  2026-05-05 · Dmitry Ilvokhin <hidden>
• COLD21d REVIEWED: 8 (8M) [PATCH v6 5/7] locking: Add contended_release tracepoint to qspinlock
  2026-05-05 · Dmitry Ilvokhin <hidden>
• COLD21d REVIEWED: 1 (0M) [PATCH v6 2/7] locking/percpu-rwsem: Extract __percpu_up_read()
  2026-05-05 · Dmitry Ilvokhin <hidden>
• COLD21d REVIEWED: 8 (8M) [PATCH v6 3/7] locking: Add contended_release tracepoint to sleepable locks
  2026-05-05 · Dmitry Ilvokhin <hidden>
• COLD60d [PATCH v4 1/3] Documentation: adopt new coding style of type-aware kmalloc-family
  2026-04-29 · Manuel Ebner <hidden>
• STALE66d [PATCH v3 1/3] Documentation: adopt new coding style of type-aware kmalloc-family
  2026-04-24 · Manuel Ebner <hidden>
• STALE62d [PATCH v5 7/7] locking: Add contended_release tracepoint to qrwlock
  2026-04-16 · Dmitry Ilvokhin <hidden>
• STALE62d [PATCH v5 5/7] locking: Add contended_release tracepoint to qspinlock
  2026-04-16 · Dmitry Ilvokhin <hidden>
• STALE62d REVIEWED: 1 (0M) [PATCH v5 2/7] locking/percpu-rwsem: Extract __percpu_up_read()
  2026-04-16 · Dmitry Ilvokhin <hidden>
• STALE62d REVIEWED: 8 (8M) [PATCH v5 3/7] locking: Add contended_release tracepoint to sleepable locks
  2026-04-16 · Dmitry Ilvokhin <hidden>
• COLD51d [RFC PATCH v3 5/7] kernel: introduce general hq-spinlock support
  2026-04-15 · Fedorov Nikita <hidden>
• COLD51d [RFC PATCH v3 3/7] hq-spinlock: add contention detection
  2026-04-15 · Fedorov Nikita <hidden>
• COLD51d [RFC PATCH v3 4/7] hq-spinlock: add hq-spinlock tunables and debug statistics
  2026-04-15 · Fedorov Nikita <hidden>
• COLD51d [RFC PATCH v3 1/7] kernel: add hq-spinlock types
  2026-04-15 · Fedorov Nikita <hidden>
• COLD51d [RFC PATCH v3 2/7] hq-spinlock: implement inner logic
  2026-04-15 · Fedorov Nikita <hidden>
• STALE78d REVIEWED: 1 (0M) [PATCH v4 2/5] locking/percpu-rwsem: Extract __percpu_up_read()
  2026-03-26 · Dmitry Ilvokhin <hidden>
• STALE78d [PATCH v4 3/5] locking: Add contended_release tracepoint to sleepable locks
  2026-03-26 · Dmitry Ilvokhin <hidden>
• STALE78d [PATCH v4 5/5] locking: Add contended_release tracepoint to spinning locks
  2026-03-26 · Dmitry Ilvokhin <hidden>
• STALE102d REVIEWED: 1 (0M) [PATCH v3 2/4] locking/percpu-rwsem: Extract __percpu_up_read()
  2026-03-18 · Dmitry Ilvokhin <hidden>
• STALE102d [PATCH v3 3/4] locking: Add contended_release tracepoint to sleepable locks
  2026-03-18 · Dmitry Ilvokhin <hidden>
• STALE102d [RFC PATCH v3 4/4] locking: Add contended_release tracepoint to spinning locks
  2026-03-18 · Dmitry Ilvokhin <hidden>
• STALE108d [PATCH v2 1/2] locking/percpu-rwsem: Extract __percpu_up_read()
  2026-03-10 · Dmitry Ilvokhin <hidden>
• STALE108d [PATCH v2 2/2] locking: Add contended_release tracepoint
  2026-03-10 · Dmitry Ilvokhin <hidden>
• STALE106d [PATCH v2 2/2] tree-wide: rename do_exit() to task_exit()
  2026-03-10 · Christian Brauner <brauner@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.

• COLD20d REVIEWED: 1 (0M) [PATCH v7 2/3] locking/percpu-rwsem: Extract __percpu_up_read()
  2026-06-04 · Dmitry Ilvokhin <hidden> · 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.

• COLD40d [PATCH v18 04/42] dept: tie to lockdep and IRQ tracing
  2025-12-05 · Byungchul Park <byungchul@sk.com>
• COLD40d [PATCH v18 24/42] locking/lockdep: prevent various lockdep assertions when lockdep_off()'ed
  2025-12-05 · Byungchul Park <byungchul@sk.com>
• COLD40d [PATCH v18 29/42] dept: make dept aware of lockdep_set_lock_cmp_fn() annotation
  2025-12-05 · Byungchul Park <byungchul@sk.com>
• STALE102d [PATCH v3 3/4] locking: Add contended_release tracepoint to sleepable locks
  2026-03-18 · Dmitry Ilvokhin <hidden>
• STALE62d [PATCH v5 7/7] locking: Add contended_release tracepoint to qrwlock
  2026-04-16 · Dmitry Ilvokhin <hidden>
• STALE66d [PATCH v3 1/3] Documentation: adopt new coding style of type-aware kmalloc-family
  2026-04-24 · Manuel Ebner <hidden>
• DORMANTno replies [PATCH v3] locking/hqlock_core: restore missing call in contention detection logic
  2026-05-12 · Fedorov Nikita <hidden>