tracing · Maintained

Maintainers

• M Steven Rostedt <rostedt@goodmis.org>
• M Masami Hiramatsu <mhiramat@kernel.org>
• R Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Paths

• F Documentation/core-api/tracepoint.rst
• F Documentation/trace/*
• F fs/tracefs/
• F include/linux/trace*.h
• F include/trace/
• F kernel/trace/
• F kernel/tracepoint.c
• F scripts/tracing/
• F scripts/tracepoint-update.c
• F tools/testing/selftests/ftrace/

Last 30 days

Most active threads (last 7 days)

• WARM1d [RFC PATCH v2 0/5] blk-iocost: BPF struct_ops cost model
  2026-09-10 12:58 · 1 reply in 7d · Tao Cui <hidden>
• WARM3d [RFC PATCH 0/8] blk-iocost: BPF struct_ops cost model
  2026-09-08 10:02 · 1 reply in 7d · Tao Cui <hidden>

Active reviewers (last 30 days)

• Michal Hocko <mhocko@suse.com>
  1 attestation (1 Acked-by) · last on 2026-09-02
• Lorenzo Stoakes (ARM) <ljs@kernel.org>
  1 attestation (1 Acked-by) · last on 2026-09-02

Recent patches

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

• WARM1d [RFC PATCH v2 3/5] blk-iocost: add iocost_ioc_tick tracepoint for per-period device summary
  2026-09-10 · Tao Cui <hidden>
• WARM3d [RFC PATCH 1/8] blk-iocost: add iocost_ioc_tick tracepoint for per-period device summary
  2026-09-08 · Tao Cui <hidden>
• COOLING10d IN LINUX-NEXT: 13 (13M) [PATCH v2 3/8] memcg: remove the soft limit reclaim tracepoints
  2026-09-02 · Shakeel Butt <shakeel.butt@linux.dev>
• COLD15d [PATCH 4/9] memcg: remove the soft limit reclaim tracepoints
  2026-08-11 · Shakeel Butt <shakeel.butt@linux.dev>
• STALE73d [PATCH v3 5/7] kernel: Use mutable list iterators
  2026-06-22 · Kaitao Cheng <hidden>
• STALE94d [PATCH RFC 15/15] mm: remove the __GFP_NO_OBJ_EXT flag
  2026-06-09 · "Vlastimil Babka (SUSE)" <vbabka@kernel.org>
• STALE113d [RFC PATCH] cgroup/rstat: convert rstat lock from spinlock to rwlock
  2026-05-19 · Thomas Falcon <hidden>
• STALE110d [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>
• STALE159d LANDED: 14 (13M) [PATCH v6 10/33] writeback: prevent memory cgroup release in writeback module
  2026-03-05 · Qi Zheng <qi.zheng@linux.dev>
• STALE191d REVIEWED: 14 (13M) [PATCH v5 10/32] writeback: prevent memory cgroup release in writeback module
  2026-02-25 · Qi Zheng <qi.zheng@linux.dev>
• STALE82d [RFC PATCH v4 02/27] mm,cpuset: gate allocations from N_MEMORY_PRIVATE behind __GFP_PRIVATE
  2026-02-22 · Gregory Price <gourry@gourry.net>
• STALE209d REVIEWED: 14 (13M) [PATCH v4 10/31] writeback: prevent memory cgroup release in writeback module
  2026-02-05 · Qi Zheng <qi.zheng@linux.dev>
• STALE223d REVIEWED: 4 (2M) [PATCH -next v2] cgroup: increase maximum subsystem count from 16 to 32
  2026-01-31 · Chen Ridong <hidden>
• STALE225d [PATCH -next] cgroup: increase maximum subsystem count from 16 to 32
  2026-01-29 · Chen Ridong <hidden>
• STALE223d REVIEWED: 14 (13M) [PATCH v3 10/30] writeback: prevent memory cgroup release in writeback module
  2026-01-14 · Qi Zheng <qi.zheng@linux.dev>
• STALE249d [PATCH 2/4] cgroup: Introduce cgroup_level() helper
  2025-12-17 · Michal Koutný <mkoutny@suse.com>
• STALE241d REVIEWED: 1 (0M) [PATCH v2 10/28] writeback: prevent memory cgroup release in writeback module
  2025-12-17 · Qi Zheng <qi.zheng@linux.dev>
• STALE313d [PATCH 12/12] trace: use override credential guard
  2025-11-03 · Christian Brauner <brauner@kernel.org>
• STALE313d [PATCH 11/12] trace: use prepare credential guard
  2025-11-03 · Christian Brauner <brauner@kernel.org>
• STALE285d [PATCH v1 09/26] writeback: prevent memory cgroup release in writeback module
  2025-10-28 · Qi Zheng <qi.zheng@linux.dev>
• STALE219d [RFC PATCH v1 02/37] KVM: Rename KVM_GENERIC_MEMORY_ATTRIBUTES to KVM_VM_MEMORY_ATTRIBUTES
  2025-10-17 · Ackerley Tng <hidden>
• STALE359d LANDED: 1 (0M) [PATCH v2 2/4] copy_process: pass clone_flags as u64 across calltree
  2025-09-01 · Simon Schuster via B4 Relay <devnull+schuster.simon.siemens-energy.com@kernel.org>
• STALE408d [PATCH] cgroup/rstat: move css_rstat_lock outside cpu loop
  2025-07-22 · Bertrand Wlodarczyk <hidden>
• STALE452d [PATCH v3 3/4] cgroup: remove per-cpu per-subsystem locks
  2025-06-17 · Shakeel Butt <shakeel.butt@linux.dev>
• STALE451d [PATCH] cgroup/rstat: change cgroup_base_stat to atomic
  2025-06-17 · Bertrand Wlodarczyk <hidden>
• STALE452d [PATCH v2 3/4] cgroup: remove per-cpu per-subsystem locks
  2025-06-11 · Shakeel Butt <shakeel.butt@linux.dev>
• STALE481d [PATCH v6 4/6] cgroup: use subsystem-specific rstat locks to avoid contention
  2025-05-15 · JP Kobryn <hidden>
• STALE488d [PATCH v5 3/5] cgroup: use subsystem-specific rstat locks to avoid contention
  2025-05-03 · JP Kobryn <hidden>
• STALE479d [OFFLIST PATCH 2/2] cgroup: use subsystem-specific rstat locks to avoid contention
  2025-04-29 · Shakeel Butt <shakeel.butt@linux.dev>
• STALE506d [PATCH v5 2/2] sched/numa: Add tracepoint that tracks the skipping of numa balancing due to cpuset memory pinning
  2025-04-24 · Libo Chen <hidden>

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.

• STALE82d [RFC PATCH v4 02/27] mm,cpuset: gate allocations from N_MEMORY_PRIVATE behind __GFP_PRIVATE
  2026-02-22 · Gregory Price <gourry@gourry.net>
• STALE94d [PATCH RFC 15/15] mm: remove the __GFP_NO_OBJ_EXT flag
  2026-06-09 · "Vlastimil Babka (SUSE)" <vbabka@kernel.org>