cpu hotplug · Maintained

Maintainers

• M Thomas Gleixner <tglx@kernel.org>
• M Peter Zijlstra <peterz@infradead.org>

Paths

• F include/linux/cpu.h
• F include/linux/cpuhotplug.h
• F include/linux/cpuhplock.h
• F include/linux/smpboot.h
• F kernel/cpu.c
• F kernel/smpboot.*
• F rust/helpers/cpu.c
• F rust/kernel/cpu.rs

Last 30 days

Most active threads (last 7 days)

• COOLING6d [RFC PATCH 0/3] sched: Handle CPU freeze without active domain housekeeping CPUs
  2026-07-22 11:53 · 1 reply in 7d · Guopeng Zhang <hidden>

Recent patches

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

• COOLING6d [RFC PATCH 1/3] sched: Preserve user affinity across frozen CPU fallback
  2026-07-22 · Guopeng Zhang <hidden>
• COLD34d [PATCH v3 05/13] cpu/hotplug: Reserve CPUHP states for nohz_full and managed IRQ down-paths
  2026-06-18 · Jing Wu <hidden>
• COLD56d [PATCH v6 09/22] mm: swap: allocate a virtual swap slot for each swapped out page
  2026-05-05 · Nhat Pham <nphamcs@gmail.com>
• COLD19d [PATCH 18/23] cpu/hotplug: Add a new cpuhp_offline_cb() API
  2026-04-21 · Waiman Long <longman@redhat.com>
• COLD19d [PATCH 10/23] cpu: Use RCU to protect access of HK_TYPE_TIMER cpumask
  2026-04-21 · Waiman Long <longman@redhat.com>
• STALE88d [PATCH v5 09/21] mm: swap: allocate a virtual swap slot for each swapped out page
  2026-03-20 · Nhat Pham <nphamcs@gmail.com>
• STALE130d [PATCH v4 09/21] mm: swap: allocate a virtual swap slot for each swapped out page
  2026-03-18 · Nhat Pham <nphamcs@gmail.com>
• STALE121d [BUG] cgroups/cpusets: Spurious CPU-hotplug failures
  2026-03-18 · "Paul E. McKenney" <paulmck@kernel.org>
• STALE153d [PATCH v3 09/20] mm: swap: allocate a virtual swap slot for each swapped out page
  2026-02-08 · Nhat Pham <nphamcs@gmail.com>
• STALE180d [PATCH 11/33] cpu: Provide lockdep check for CPU hotplug lock write-held
  2026-01-25 · Frederic Weisbecker <frederic@kernel.org>
• STALE180d [PATCH 02/33] cpu: Revert "cpu/hotplug: Prevent self deadlock on CPU hot-unplug"
  2026-01-25 · Frederic Weisbecker <frederic@kernel.org>
• STALE155d REVIEWED: 2 (2M) [PATCH 29/33] sched/arm64: Move fallback task cpumask to HK_TYPE_DOMAIN
  2026-01-01 · Frederic Weisbecker <frederic@kernel.org>
• STALE155d [PATCH 11/33] cpu: Provide lockdep check for CPU hotplug lock write-held
  2026-01-01 · Frederic Weisbecker <frederic@kernel.org>
• STALE155d [PATCH 02/33] cpu: Revert "cpu/hotplug: Prevent self deadlock on CPU hot-unplug"
  2026-01-01 · Frederic Weisbecker <frederic@kernel.org>
• STALE209d [PATCH 29/33] sched/arm64: Move fallback task cpumask to HK_TYPE_DOMAIN
  2025-12-24 · Frederic Weisbecker <frederic@kernel.org>
• STALE209d [PATCH 11/33] cpu: Provide lockdep check for CPU hotplug lock write-held
  2025-12-24 · Frederic Weisbecker <frederic@kernel.org>
• STALE209d [PATCH 02/33] cpu: Revert "cpu/hotplug: Prevent self deadlock on CPU hot-unplug"
  2025-12-24 · Frederic Weisbecker <frederic@kernel.org>
• STALE217d [PATCH 27/31] sched/arm64: Move fallback task cpumask to HK_TYPE_DOMAIN
  2025-11-05 · Frederic Weisbecker <frederic@kernel.org>
• STALE217d [PATCH 10/31] cpu: Provide lockdep check for CPU hotplug lock write-held
  2025-11-05 · Frederic Weisbecker <frederic@kernel.org>
• STALE217d [PATCH 02/31] cpu: Revert "cpu/hotplug: Prevent self deadlock on CPU hot-unplug"
  2025-11-05 · Frederic Weisbecker <frederic@kernel.org>
• STALE264d [PATCH 27/33] sched/arm64: Move fallback task cpumask to HK_TYPE_DOMAIN
  2025-10-13 · Frederic Weisbecker <frederic@kernel.org>
• STALE264d [PATCH 10/33] cpu: Provide lockdep check for CPU hotplug lock write-held
  2025-10-13 · Frederic Weisbecker <frederic@kernel.org>
• STALE264d [PATCH 02/33] cpu: Revert "cpu/hotplug: Prevent self deadlock on CPU hot-unplug"
  2025-10-13 · Frederic Weisbecker <frederic@kernel.org>
• STALE354d [RFC PATCH 05/18] cpu/hotplug: Add a new cpuhp_offline_cb() API
  2025-08-08 · Waiman Long <longman@redhat.com>
• STALE568d [RFC PATCH v3 3/3] genirq/cpuhotplug: Adjust managed irqs according to change of housekeeping CPU
  2024-10-29 · Costa Shulyupin <hidden>
• STALE791d [PATCH 5/6] cpumask: cleanup core headers inclusion
  2024-05-28 · Yury Norov <yury.norov@gmail.com>
• STALE792d REVIEWED: 1 (1M) [PATCH AUTOSEL 6.8 05/20] cgroup/cpuset: Make cpuset hotplug processing synchronous
  2024-05-27 · Sasha Levin <sashal@kernel.org>
• STALE769d REVIEWED: 1 (1M) [PATCH AUTOSEL 6.9 06/23] cgroup/cpuset: Make cpuset hotplug processing synchronous
  2024-05-27 · Sasha Levin <sashal@kernel.org>
• STALE841d [PATCH v2 1/2] cgroup/cpuset: Make cpuset hotplug processing synchronous
  2024-04-04 · Waiman Long <longman@redhat.com>
• STALE846d [PATCH 1/2] cgroup/cpuset: Make cpuset hotplug processing synchronous
  2024-04-01 · Waiman Long <longman@redhat.com>

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.

• STALE155d [PATCH 02/33] cpu: Revert "cpu/hotplug: Prevent self deadlock on CPU hot-unplug"
  2026-01-01 · Frederic Weisbecker <frederic@kernel.org>
• STALE155d [PATCH 11/33] cpu: Provide lockdep check for CPU hotplug lock write-held
  2026-01-01 · Frederic Weisbecker <frederic@kernel.org>
• STALE180d [PATCH 02/33] cpu: Revert "cpu/hotplug: Prevent self deadlock on CPU hot-unplug"
  2026-01-25 · Frederic Weisbecker <frederic@kernel.org>
• STALE180d [PATCH 11/33] cpu: Provide lockdep check for CPU hotplug lock write-held
  2026-01-25 · Frederic Weisbecker <frederic@kernel.org>
• STALE88d [PATCH v5 09/21] mm: swap: allocate a virtual swap slot for each swapped out page
  2026-03-20 · Nhat Pham <nphamcs@gmail.com>
• COLD56d [PATCH v6 09/22] mm: swap: allocate a virtual swap slot for each swapped out page
  2026-05-05 · Nhat Pham <nphamcs@gmail.com>