control group (cgroup) · Maintained

Maintainers

• M Tejun Heo <tj@kernel.org>
• M Johannes Weiner <hannes@cmpxchg.org>
• M Michal Koutný <mkoutny@suse.com>

Paths

• F Documentation/admin-guide/cgroup-v1/
• F Documentation/admin-guide/cgroup-v2.rst
• F include/linux/cgroup*
• F kernel/cgroup/
• F tools/testing/selftests/cgroup/

Last 30 days

Most active threads (last 7 days)

• WARM1d [PATCH v3 0/4] cgroup: expose cpu.stat and io.stat to BPF
  2026-08-20 21:18 · 2 replies in 7d · Ziyang Men <hidden>
• WARM1d [RFC PATCH v3 0/3] blk-cgroup: store blkcg in bio before blkcg_mutex conversion
  2026-08-18 07:08 · 1 reply in 7d · Yu Kuai <yukuai@kernel.org>

Active reviewers (last 30 days)

• Shakeel Butt <shakeel.butt@linux.dev>
  2 attestations (2 Suggested-by) · last on 2026-08-20
• Tejun Heo <tj@kernel.org>
  2 attestations (2 Suggested-by) · last on 2026-08-20
• Michal Koutný <mkoutny@suse.com>
  1 attestation (1 Acked-by) · last on 2026-07-28

Recent patches

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

• WARM1d [PATCH v3 3/4] block: add BPF kfuncs to read blkcg io.stat
  2026-08-20 · Ziyang Men <hidden>
• WARM1d [PATCH v3 1/4] cgroup: add BPF kfuncs to read a cpu cgroup's stats
  2026-08-20 · Ziyang Men <hidden>
• WARM1d [RFC PATCH v3 2/3] blk-cgroup: store blkcg in bio instead of blkg
  2026-08-18 · Yu Kuai <yukuai@kernel.org>
• COOLING7d [RFC PATCH v2 3/4] blk-cgroup: store blkcg in bio instead of blkg
  2026-08-11 · Yu Kuai <yukuai@kernel.org>
• COLD15d [RFC PATCH v1 2/3] blk-cgroup: store blkcg in bio instead of blkg
  2026-08-04 · Yu Kuai <yukuai@kernel.org>
• COLD19d REVIEWED: 1 (1M) [PATCH v4] Docs/admin-guide/cgroup-v2: document io.latency rotational vs non-rotational behavior
  2026-07-28 · Tao Cui <hidden>
• COLD25d [PATCH v2 1/3] umh, treewide: Explicitly include linux/umh.h where needed
  2026-07-21 · Petr Pavlu <petr.pavlu@suse.com>
• COLD35d [PATCH v2 2/2] Docs/admin-guide/cgroup-v2: fix delay_nsec unit in io.latency doc
  2026-07-17 · Tao Cui <hidden>
• COLD35d [PATCH v2 1/2] Docs/admin-guide/cgroup-v2: document io.latency rotational vs non-rotational behavior
  2026-07-17 · Tao Cui <hidden>
• DORMANTno replies [PATCH 2/2] Docs/admin-guide/cgroup-v2: fix delay_nsec unit in io.latency doc
  2026-07-17 · Tao Cui <hidden>
• COLD35d [PATCH 1/2] Docs/admin-guide/cgroup-v2: document io.latency rotational vs non-rotational behavior
  2026-07-17 · Tao Cui <hidden>
• COLD42d [PATCH 1/2] umh, treewide: Explicitly include linux/umh.h where needed
  2026-07-08 · Petr Pavlu <petr.pavlu@suse.com>
• STALE88d [PATCH v2] cgroup/rstat: validate cpu before css_rstat_cpu() access
  2026-05-16 · Qing Ming <hidden>
• STALE205d REVIEWED: 2 (2M) [PATCH 30/33] kthread: Honour kthreads preferred affinity after cpuset changes
  2026-01-25 · Frederic Weisbecker <frederic@kernel.org>
• STALE205d REVIEWED: 2 (2M) [PATCH 21/33] cpuset: Remove cpuset_cpu_is_isolated()
  2026-01-25 · Frederic Weisbecker <frederic@kernel.org>
• STALE205d [PATCH 19/33] cpuset: Propagate cpuset isolation update to timers through housekeeping
  2026-01-25 · Frederic Weisbecker <frederic@kernel.org>
• STALE205d REVIEWED: 8 (8M) [PATCH 18/33] cpuset: Propagate cpuset isolation update to workqueue through housekeeping
  2026-01-25 · Frederic Weisbecker <frederic@kernel.org>
• STALE205d REVIEWED: 3 (2M) [PATCH 14/33] cpuset: Update HK_TYPE_DOMAIN cpumask from cpuset
  2026-01-25 · Frederic Weisbecker <frederic@kernel.org>
• STALE205d [PATCH 12/33] cpuset: Provide lockdep check for cpuset lock held
  2026-01-25 · Frederic Weisbecker <frederic@kernel.org>
• STALE205d REVIEWED: 4 (2M) [PATCH 06/33] cpuset: Convert boot_hk_cpus to use HK_TYPE_DOMAIN_BOOT
  2026-01-25 · Frederic Weisbecker <frederic@kernel.org>
• STALE179d REVIEWED: 2 (2M) [PATCH 30/33] kthread: Honour kthreads preferred affinity after cpuset changes
  2026-01-01 · Frederic Weisbecker <frederic@kernel.org>
• STALE179d REVIEWED: 2 (2M) [PATCH 29/33] sched/arm64: Move fallback task cpumask to HK_TYPE_DOMAIN
  2026-01-01 · Frederic Weisbecker <frederic@kernel.org>
• STALE179d REVIEWED: 2 (2M) [PATCH 21/33] cpuset: Remove cpuset_cpu_is_isolated()
  2026-01-01 · Frederic Weisbecker <frederic@kernel.org>
• STALE179d [PATCH 19/33] cpuset: Propagate cpuset isolation update to timers through housekeeping
  2026-01-01 · Frederic Weisbecker <frederic@kernel.org>
• STALE179d REVIEWED: 8 (8M) [PATCH 18/33] cpuset: Propagate cpuset isolation update to workqueue through housekeeping
  2026-01-01 · Frederic Weisbecker <frederic@kernel.org>
• STALE179d REVIEWED: 3 (2M) [PATCH 14/33] cpuset: Update HK_TYPE_DOMAIN cpumask from cpuset
  2026-01-01 · Frederic Weisbecker <frederic@kernel.org>
• STALE179d [PATCH 12/33] cpuset: Provide lockdep check for cpuset lock held
  2026-01-01 · Frederic Weisbecker <frederic@kernel.org>
• STALE179d REVIEWED: 4 (2M) [PATCH 06/33] cpuset: Convert boot_hk_cpus to use HK_TYPE_DOMAIN_BOOT
  2026-01-01 · Frederic Weisbecker <frederic@kernel.org>
• STALE233d [PATCH 30/33] kthread: Honour kthreads preferred affinity after cpuset changes
  2025-12-24 · Frederic Weisbecker <frederic@kernel.org>
• STALE233d [PATCH 29/33] sched/arm64: Move fallback task cpumask to HK_TYPE_DOMAIN
  2025-12-24 · Frederic Weisbecker <frederic@kernel.org>

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.

• STALE205d [PATCH 12/33] cpuset: Provide lockdep check for cpuset lock held
  2026-01-25 · Frederic Weisbecker <frederic@kernel.org>
• STALE205d [PATCH 19/33] cpuset: Propagate cpuset isolation update to timers through housekeeping
  2026-01-25 · Frederic Weisbecker <frederic@kernel.org>
• COLD35d [PATCH 1/2] Docs/admin-guide/cgroup-v2: document io.latency rotational vs non-rotational behavior
  2026-07-17 · Tao Cui <hidden>
• DORMANTno replies [PATCH 2/2] Docs/admin-guide/cgroup-v2: fix delay_nsec unit in io.latency doc
  2026-07-17 · Tao Cui <hidden>
• COLD25d [PATCH v2 1/3] umh, treewide: Explicitly include linux/umh.h where needed
  2026-07-21 · Petr Pavlu <petr.pavlu@suse.com>