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)

• HOTtoday [PATCH v10 RESEND 0/9] riscv: add SBI Supervisor Software Events support
  2026-09-21 11:17 · 1 reply in 7d · Zhanpeng Zhang <hidden>
• COOLING5d [PATCH v6 0/3] drivers/perf: hisi: Updates for HiSilicon uncore PMUs
  2026-09-16 06:54 · 1 reply in 7d · Yushan Wang <wangyushan12@huawei.com>

Active reviewers (last 30 days)

• Himanshu Chauhan <hidden>
  2 attestations (2 Co-developed-by) · last on 2026-09-21
• Zhanpeng Zhang <hidden>
  2 attestations (2 Co-developed-by) · last on 2026-09-21
• Conor Dooley <conor.dooley@microchip.com>
  2 attestations (2 Acked-by) · last on 2026-09-21
• Robin Murphy <robin.murphy@arm.com>
  1 attestation (1 Reviewed-by) · last on 2026-09-09
• Jonathan Cameron <hidden>
  1 attestation (1 Reviewed-by) · last on 2026-09-09

Recent patches

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

• HOTtoday REVIEWED: 3 (3M) [PATCH v10 RESEND 4/9] drivers: firmware: add riscv SSE support
  2026-09-21 · Zhanpeng Zhang <hidden>
• DORMANTno replies [PATCH v6 1/3] drivers/perf: hisi: Consolidate uncore PMU cpuhp states
  2026-09-16 · Yushan Wang <wangyushan12@huawei.com>
• COOLING4d REVIEWED: 3 (3M) [PATCH v10 4/9] drivers: firmware: add riscv SSE support
  2026-09-11 · Zhanpeng Zhang <hidden>
• COOLING12d REVIEWED: 7 (6M) [PATCH v5 1/3] drivers/perf: hisi: Consolidate uncore PMU cpuhp states
  2026-09-09 · Yushan Wang <wangyushan12@huawei.com>
• WARM3d [PATCH 04/19] cpu/hotplug: Propagate bring-up status to arch_cpuhp_cleanup_kick_cpu()
  2026-09-07 · Will Deacon <will@kernel.org>
• WARM3d [PATCH 03/19] cpu/hotplug: Avoid busy-polling on archs where cpu_relax() is a no-op
  2026-09-07 · Will Deacon <will@kernel.org>
• WARM3d [PATCH 01/19] cpu/hotplug: Clean up cmpxchg() logic in cpuhp_can_boot_ap()
  2026-09-07 · Will Deacon <will@kernel.org>
• WARM3d [PATCH 02/19] cpu/hotplug: Avoid trying to bring up CPUs that are already online
  2026-09-07 · Will Deacon <will@kernel.org>
• COLD53d [PATCH 1/3] drivers/perf: hisi: Consolidate uncore PMU cpuhp states
  2026-07-24 · Yushan Wang <wangyushan12@huawei.com>
• STALE68d [PATCH] cpu/hotplug: Remove CPUHP_AP_ARM_CORESIGHT_CTI_STARTING
  2026-07-11 · Zenghui Yu <hidden>
• COLD20d [PATCH v3 01/12] cpu/hotplug: Introduce CONFIG_HOTPLUG_PARALLEL_SMT
  2026-06-24 · Jinjie Ruan <hidden>
• COLD20d [PATCH v3 02/12] cpu/hotplug: Propagate bring-up status to arch_cpuhp_cleanup_kick_cpu()
  2026-06-24 · Jinjie Ruan <hidden>
• STALE89d [PATCH v2 1/4] cpu/hotplug: Introduce CONFIG_PARALLEL_SMT_PRIMARY_FIRST
  2026-06-18 · Jinjie Ruan <hidden>
• STALE89d [PATCH RFC 1/3] cpu/hotplug: Introduce CONFIG_PARALLEL_SMT_PRIMARY_FIRST
  2026-06-11 · Jinjie Ruan <hidden>
• STALE104d Re: [PATCH v3] cpu/hotplug: Fix NULL kobject warning in cpuhp_smt_enable()
  2026-06-03 · Jinjie Ruan <hidden>
• STALE63d [PATCH v7 06/16] arm64: ras: Enable error reporting
  2026-06-02 · Ruidong Tian <hidden>
• STALE126d IN LINUX-NEXT: 8 (6M) [PATCH v14 27/28] coresight: Move CPU hotplug callbacks to core layer
  2026-05-15 · Leo Yan <leo.yan@arm.com>
• STALE129d REVIEWED: 8 (6M) [PATCH v13 27/28] coresight: Move CPU hotplug callbacks to core layer
  2026-05-15 · Leo Yan <leo.yan@arm.com>
• STALE129d REVIEWED: 8 (6M) [PATCH v12 27/28] coresight: Move CPU hotplug callbacks to core layer
  2026-05-11 · Leo Yan <leo.yan@arm.com>
• STALE136d REVIEWED: 8 (6M) [PATCH v11 26/27] coresight: Move CPU hotplug callbacks to core layer
  2026-05-01 · Leo Yan <leo.yan@arm.com>
• STALE87d REVIEWED: 41 (41M) [PATCH v5 9/9] driver core: Replace dev->offline + ->offline_disabled with accessors
  2026-04-06 · Douglas Anderson <dianders@chromium.org>
• STALE160d REVIEWED: 7 (6M) [PATCH v10 19/20] coresight: Move CPU hotplug callbacks to core layer
  2026-04-05 · Leo Yan <leo.yan@arm.com>
• STALE168d REVIEWED: 8 (8M) [PATCH v4 9/9] driver core: Replace dev->offline + ->offline_disabled with accessors
  2026-04-04 · Douglas Anderson <dianders@chromium.org>
• STALE171d [PATCH v3 9/9] driver core: Replace dev->offline + ->offline_disabled with DEV_FLAGs
  2026-04-03 · Douglas Anderson <dianders@chromium.org>
• STALE236d [PATCH 11/33] cpu: Provide lockdep check for CPU hotplug lock write-held
  2026-01-25 · Frederic Weisbecker <frederic@kernel.org>
• STALE236d [PATCH 02/33] cpu: Revert "cpu/hotplug: Prevent self deadlock on CPU hot-unplug"
  2026-01-25 · Frederic Weisbecker <frederic@kernel.org>
• STALE188d [PATCH v6 09/16] ras: AEST: Add cpuhp callback
  2026-01-22 · Ruidong Tian <hidden>
• STALE210d REVIEWED: 2 (2M) [PATCH 29/33] sched/arm64: Move fallback task cpumask to HK_TYPE_DOMAIN
  2026-01-01 · Frederic Weisbecker <frederic@kernel.org>
• STALE210d [PATCH 11/33] cpu: Provide lockdep check for CPU hotplug lock write-held
  2026-01-01 · Frederic Weisbecker <frederic@kernel.org>
• STALE210d [PATCH 02/33] cpu: Revert "cpu/hotplug: Prevent self deadlock on CPU hot-unplug"
  2026-01-01 · Frederic Weisbecker <frederic@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.

• STALE160d REVIEWED: 7 (6M) [PATCH v10 19/20] coresight: Move CPU hotplug callbacks to core layer
  2026-04-05 · Leo Yan <leo.yan@arm.com> · 2 Reviewed-by, 1 Tested-by
• STALE136d REVIEWED: 8 (6M) [PATCH v11 26/27] coresight: Move CPU hotplug callbacks to core layer
  2026-05-01 · Leo Yan <leo.yan@arm.com> · 2 Reviewed-by, 2 Tested-by
• STALE129d REVIEWED: 8 (6M) [PATCH v12 27/28] coresight: Move CPU hotplug callbacks to core layer
  2026-05-11 · Leo Yan <leo.yan@arm.com> · 2 Reviewed-by, 2 Tested-by
• STALE129d REVIEWED: 8 (6M) [PATCH v13 27/28] coresight: Move CPU hotplug callbacks to core layer
  2026-05-15 · Leo Yan <leo.yan@arm.com> · 2 Reviewed-by, 2 Tested-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.

• STALE63d [PATCH v7 06/16] arm64: ras: Enable error reporting
  2026-06-02 · Ruidong Tian <hidden>
• STALE89d [PATCH v2 1/4] cpu/hotplug: Introduce CONFIG_PARALLEL_SMT_PRIMARY_FIRST
  2026-06-18 · Jinjie Ruan <hidden>
• COLD20d [PATCH v3 02/12] cpu/hotplug: Propagate bring-up status to arch_cpuhp_cleanup_kick_cpu()
  2026-06-24 · Jinjie Ruan <hidden>