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)

• 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

Recent patches

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

• COOLING8d [RFC PATCH 1/2] cpu/hotplug: Skip disabled CPUs in cpuhp_smt_enable
  2026-09-29 · <hidden>
• COOLING8d [PATCH v14 04/13] cpumask: Introduce cpu_preferred_mask
  2026-09-28 · Shrikanth Hegde <sshegde@linux.ibm.com>
• COOLING6d REVIEWED: 3 (3M) [PATCH v10 RESEND 4/9] drivers: firmware: add riscv SSE support
  2026-09-21 · Zhanpeng Zhang <hidden>
• COLD16d [RFC PATCH 15/46] cpu_preserve: Add physical CPU preservation lifecycle and build rules
  2026-09-20 · Pasha Tatashin <pasha.tatashin@soleen.com>
• WARM2d REVIEWED: 3 (3M) [PATCH v10 4/9] drivers: firmware: add riscv SSE support
  2026-09-11 · Zhanpeng Zhang <hidden>
• COOLING12d [PATCH v13 04/13] cpumask: Introduce cpu_preferred_mask
  2026-09-09 · Shrikanth Hegde <sshegde@linux.ibm.com>
• COLD29d [PATCH v12 04/13] cpumask: Introduce cpu_preferred_mask
  2026-09-03 · Shrikanth Hegde <sshegde@linux.ibm.com>
• COLD36d [PATCH v11 03/12] cpumask: Introduce cpu_preferred_mask
  2026-08-25 · Shrikanth Hegde <sshegde@linux.ibm.com>
• COLD41d [PATCH v10 03/12] cpumask: Introduce cpu_preferred_mask
  2026-08-12 · Shrikanth Hegde <sshegde@linux.ibm.com>
• COLD58d [PATCH v9 02/11] cpumask: Introduce cpu_preferred_mask
  2026-07-24 · Shrikanth Hegde <sshegde@linux.ibm.com>
• STALE78d [PATCH v8 02/11] cpumask: Introduce cpu_preferred_mask
  2026-07-20 · Shrikanth Hegde <sshegde@linux.ibm.com>
• STALE85d [PATCH v7 02/12] cpumask: Introduce cpu_preferred_mask
  2026-07-09 · Shrikanth Hegde <sshegde@linux.ibm.com>
• STALE88d [PATCH v3 04/26] cpu: Annotate static information into meminspect
  2026-07-08 · Mukesh Ojha <hidden>
• COLD38d [PATCH v19 26/40] cpu/hotplug: use a weaker annotation in AP thread
  2026-07-06 · Byungchul Park <byungchul@sk.com>
• STALE91d [PATCH v6 03/23] cpumask: Introduce cpu_preferred_mask
  2026-07-01 · Shrikanth Hegde <sshegde@linux.ibm.com>
• STALE100d [PATCH v5 04/24] cpumask: Introduce cpu_preferred_mask
  2026-06-25 · Shrikanth Hegde <sshegde@linux.ibm.com>
• STALE106d [PATCH v3 05/13] cpu/hotplug: Reserve CPUHP states for nohz_full and managed IRQ down-paths
  2026-06-18 · Jing Wu <hidden>
• STALE120d Re: [PATCH v3] cpu/hotplug: Fix NULL kobject warning in cpuhp_smt_enable()
  2026-06-03 · Jinjie Ruan <hidden>
• STALE128d [PATCH v6 09/22] mm: swap: allocate a virtual swap slot for each swapped out page
  2026-05-05 · Nhat Pham <nphamcs@gmail.com>
• STALE91d [PATCH 18/23] cpu/hotplug: Add a new cpuhp_offline_cb() API
  2026-04-21 · Waiman Long <longman@redhat.com>
• STALE91d [PATCH 10/23] cpu: Use RCU to protect access of HK_TYPE_TIMER cpumask
  2026-04-21 · Waiman Long <longman@redhat.com>
• STALE159d [PATCH v5 09/21] mm: swap: allocate a virtual swap slot for each swapped out page
  2026-03-20 · Nhat Pham <nphamcs@gmail.com>
• STALE202d [PATCH v4 09/21] mm: swap: allocate a virtual swap slot for each swapped out page
  2026-03-18 · Nhat Pham <nphamcs@gmail.com>
• STALE140d [PATCH v2 04/25] cpu: Annotate static information into meminspect
  2026-03-10 · Mukesh Ojha <hidden>
• STALE252d REVIEWED: 11 (8M) [PATCH v26 13/28] prctl: arch-agnostic prctl for indirect branch tracking
  2025-12-11 · Deepak Gupta via B4 Relay <devnull+debug.rivosinc.com@kernel.org>
• STALE300d REVIEWED: 11 (8M) [PATCH v25 13/28] prctl: arch-agnostic prctl for indirect branch tracking
  2025-12-05 · Deepak Gupta via B4 Relay <devnull+debug.rivosinc.com@kernel.org>
• STALE306d REVIEWED: 11 (8M) [PATCH v25 13/28] prctl: arch-agnostic prctl for indirect branch tracking
  2025-12-05 · Deepak Gupta <hidden>
• STALE94d [PATCH v18 26/42] cpu/hotplug: use a weaker annotation in AP thread
  2025-12-05 · Byungchul Park <byungchul@sk.com>
• STALE306d REVIEWED: 11 (8M) [PATCH v24 13/28] prctl: arch-agnostic prctl for indirect branch tracking
  2025-12-04 · Deepak Gupta <hidden>
• STALE259d [PATCH 04/26] cpu: Annotate static information into meminspect
  2025-11-19 · Eugen Hristev <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.

• STALE159d [PATCH v5 09/21] mm: swap: allocate a virtual swap slot for each swapped out page
  2026-03-20 · Nhat Pham <nphamcs@gmail.com>
• STALE128d [PATCH v6 09/22] mm: swap: allocate a virtual swap slot for each swapped out page
  2026-05-05 · Nhat Pham <nphamcs@gmail.com>
• COLD38d [PATCH v19 26/40] cpu/hotplug: use a weaker annotation in AP thread
  2026-07-06 · Byungchul Park <byungchul@sk.com>
• STALE88d [PATCH v3 04/26] cpu: Annotate static information into meminspect
  2026-07-08 · Mukesh Ojha <hidden>
• STALE78d [PATCH v8 02/11] cpumask: Introduce cpu_preferred_mask
  2026-07-20 · Shrikanth Hegde <sshegde@linux.ibm.com>
• COLD41d [PATCH v10 03/12] cpumask: Introduce cpu_preferred_mask
  2026-08-12 · Shrikanth Hegde <sshegde@linux.ibm.com>
• COLD36d [PATCH v11 03/12] cpumask: Introduce cpu_preferred_mask
  2026-08-25 · Shrikanth Hegde <sshegde@linux.ibm.com>
• COLD29d [PATCH v12 04/13] cpumask: Introduce cpu_preferred_mask
  2026-09-03 · Shrikanth Hegde <sshegde@linux.ibm.com>