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

Active reviewers (last 30 days)

• Zhenglang Hu <hidden>
  1 attestation (1 Tested-by) · last on 2026-07-08

Recent patches

Most-recent 17 patches in this subsystem on linux-perf-users, ordered by date desc.

• COLD22d REVIEWED: 1 (0M) [PATCH v3 1/2] perf/x86/amd/uncore: Add Hygon uncore PMU support
  2026-07-08 · Qi Liu <hidden>
• COLD24d REVIEWED: 1 (0M) [PATCH v2 3/3] perf/x86/amd/uncore: Add Hygon uncore PMU support
  2026-07-01 · Qi Liu <hidden>
• COLD30d REVIEWED: 1 (0M) [PATCH 3/3] perf/x86/amd/uncore: Add Hygon uncore PMU support
  2026-07-01 · Qi Liu <hidden>
• STALE73d REVIEWED: 1 (0M) [RFC PATCH 3/3] perf/x86/amd/uncore: Add Hygon uncore PMU support
  2026-05-19 · Qi Liu <hidden>
• STALE136d [PATCH v6 09/16] ras: AEST: Add cpuhp callback
  2026-01-22 · Ruidong Tian <hidden>
• STALE448d [PATCH 3/4] perf: Remove too early and redundant CPU hotplug handling
  2025-04-24 · Frederic Weisbecker <frederic@kernel.org>
• STALE686d [PATCH 1/2] powerpc/vpa_pmu: Add interface to expose vpa counters via perf
  2024-08-28 · Kajol Jain <hidden>
• STALE718d [RFC 1/2] powerpc/vpa_pmu: Add interface to expose vpa counters via perf
  2024-08-05 · Kajol Jain <hidden>
• STALE1025d [PATCH 6/7] fs/sysfs/group: make attribute_group pointers const
  2023-10-09 · Max Kellermann <hidden>
• STALE1606d [PATCH v2 1/2] drivers/perf: hisi: Add Support for CPA PMU
  2022-02-24 · Qi Liu <hidden>
• STALE1683d [PATCH 15/17] kernel/cpu: add num_active_cpu counter
  2021-12-18 · Yury Norov <yury.norov@gmail.com>
• STALE1683d [PATCH 14/17] kernel/cpu: add num_present_cpu counter
  2021-12-18 · Yury Norov <yury.norov@gmail.com>
• STALE1683d [PATCH 13/17] kernel/cpu: add num_possible_cpus counter
  2021-12-18 · Yury Norov <yury.norov@gmail.com>
• STALE1683d [PATCH 12/17] kernel/cpu.c: fix init_cpu_online
  2021-12-18 · Yury Norov <yury.norov@gmail.com>
• STALE1688d [v4 03/11] RISC-V: Add a perf core library for pmu drivers
  2021-10-25 · Atish Patra <hidden>
• STALE1758d [v3 03/10] RISC-V: Add a perf core library for pmu drivers
  2021-09-10 · Atish Patra <hidden>
• STALE1794d [RFC v2 3/7] RISC-V: Add a perf core library for pmu drivers
  2021-05-28 · Atish Patra <hidden>

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.

• COLD24d REVIEWED: 1 (0M) [PATCH v2 3/3] perf/x86/amd/uncore: Add Hygon uncore PMU support
  2026-07-01 · Qi Liu <hidden> · 1 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.

• STALE136d [PATCH v6 09/16] ras: AEST: Add cpuhp callback
  2026-01-22 · Ruidong Tian <hidden>