cpu idle time management framework · Maintained

Maintainers

• M "Rafael J. Wysocki" <rafael@kernel.org>
• M Daniel Lezcano <daniel.lezcano@kernel.org>
• R Christian Loehle <christian.loehle@arm.com>

Paths

• F Documentation/admin-guide/pm/cpuidle.rst
• F Documentation/driver-api/pm/cpuidle.rst
• F drivers/cpuidle/
• F include/linux/cpuidle.h

Last 30 days

Most active threads (last 7 days)

• WARM3d [PATCH v2 0/6] cpuidle: speed up do_idle() by caching the governor latency QoS constraint
  2026-07-29 06:18 · 3 replies in 7d · Yaxiong Tian <hidden>

Active reviewers (last 30 days)

• Bartosz Golaszewski <hidden>
  2 attestations (1 Reviewed-by, 1 Suggested-by) · last on 2026-07-14
• Rafael J. Wysocki <rafael@kernel.org>
  2 attestations (1 Acked-by, 1 Suggested-by) · last on 2026-07-14
• Haris Okanovic <hidden>
  1 attestation (1 Tested-by) · last on 2026-07-14

Recent patches

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

• WARM3d [PATCH v2 4/6] cpuidle: cache aggregated governor latency QoS constraint
  2026-07-29 · Yaxiong Tian <hidden>
• WARM3d [PATCH v2 3/6] cpuidle: invalidate latency gen on per-CPU resume QoS changes
  2026-07-29 · Yaxiong Tian <hidden>
• WARM3d [PATCH v2 2/6] cpuidle: subscribe to global latency QoS notifiers
  2026-07-29 · Yaxiong Tian <hidden>
• COOLING8d [PATCH 4/5] cpuidle: cache aggregated governor latency QoS constraint
  2026-07-21 · Yaxiong Tian <hidden>
• COOLING8d [PATCH 3/5] cpuidle: invalidate latency gen on per-CPU resume QoS changes
  2026-07-21 · Yaxiong Tian <hidden>
• COOLING8d [PATCH 2/5] cpuidle: subscribe to global latency QoS notifiers
  2026-07-21 · Yaxiong Tian <hidden>
• COOLING9d REVIEWED: 1 (0M) [PATCH v23 05/13] mfd: psci-mfd: Add PSCI MFD driver for cpuidle-psci-domain cell
  2026-07-14 · Shivendra Pratap <hidden>
• WARM1d REVIEWED: 19 (18M) [PATCH v14 12/15] cpuidle/poll_state: Wait for need-resched via tif_need_resched_relaxed_wait()
  2026-07-14 · Ankur Arora <hidden>
• COLD15d IN LINUX-NEXT [PATCH v2 4/5] soc: qcom: Avoid SCM and SPM for cpuidle drivers
  2026-07-11 · Krzysztof Kozlowski <hidden>
• COLD25d REVIEWED: 19 (18M) [PATCH v13 12/15] cpuidle/poll_state: Wait for need-resched via tif_need_resched_relaxed_wait()
  2026-07-02 · Ankur Arora <hidden>
• COLD28d [PATCH] mfd: db8500-prcmu: Fold dbx500 header into db8500
  2026-06-19 · Linus Walleij <linusw@kernel.org>
• COLD39d [PATCH v3 4/5] s390/idle: Introduce cpuidle for s390
  2026-06-18 · Mete Durlu <hidden>
• COLD44d [PATCH v2 4/5] s390/idle: Introduce cpuidle for s390
  2026-06-09 · Mete Durlu <hidden>
• COLD47d REVIEWED: 19 (18M) [PATCH v12 12/15] cpuidle/poll_state: Wait for need-resched via tif_need_resched_relaxed_wait()
  2026-06-08 · Ankur Arora <hidden>
• COLD28d REVIEWED: 1 (0M) [PATCH v22 05/13] mfd: psci-mfd: Add PSCI MFD driver for cpuidle-psci-domain cell
  2026-05-14 · Shivendra Pratap <hidden>
• STALE93d [PATCH] cpuidle: menu: correct variance calculation
  2026-04-29 · Julia Lawall <Julia.Lawall@inria.fr>
• STALE88d [PATCH v21 05/13] mfd: psci-mfd: Add PSCI MFD driver for cpuidle-psci-domain cell
  2026-04-27 · Shivendra Pratap <hidden>
• STALE71d REVIEWED: 18 (18M) [PATCH v11 12/14] cpuidle/poll_state: Wait for need-resched via tif_need_resched_relaxed_wait()
  2026-04-08 · Ankur Arora <hidden>
• STALE110d [PATCH v2] cpuidle: Deny idle entry when CPU already have IPI interrupt pending
  2026-04-03 · Maulik Shah <hidden>
• DORMANTno replies [PATCH] cpuidle: cleanup dead dependencies on CPU_IDLE in Kconfig
  2026-03-31 · Julian Braha <hidden>
• STALE133d REVIEWED: 1 (1M) [PATCH v2 6.12.y 6/6] cpuidle: menu: Optimize bucket assignment when next_timer_ns equals KTIME_MAX
  2026-03-21 · Ionut Nechita (Wind River) <hidden>
• STALE133d REVIEWED: 4 (3M) [PATCH v2 6.12.y 4/6] cpuidle: menu: Eliminate outliers on both ends of the sample set
  2026-03-21 · Ionut Nechita (Wind River) <hidden>
• STALE133d REVIEWED: 1 (1M) [PATCH v2 6.12.y 5/6] cpuidle: menu: Update documentation after get_typical_interval() changes
  2026-03-21 · Ionut Nechita (Wind River) <hidden>
• STALE133d REVIEWED: 4 (3M) [PATCH v2 6.12.y 3/6] cpuidle: menu: Tweak threshold use in get_typical_interval()
  2026-03-21 · Ionut Nechita (Wind River) <hidden>
• STALE133d REVIEWED: 4 (3M) [PATCH v2 6.12.y 2/6] cpuidle: menu: Use one loop for average and variance computations
  2026-03-21 · Ionut Nechita (Wind River) <hidden>
• STALE133d REVIEWED: 4 (3M) [PATCH v2 6.12.y 1/6] cpuidle: menu: Drop a redundant local variable
  2026-03-21 · Ionut Nechita (Wind River) <hidden>
• STALE133d REVIEWED: 1 (1M) [PATCH 6.12.y 5/6] cpuidle: menu: Update documentation after get_typical_interval() changes
  2026-03-20 · Ionut Nechita <hidden>
• STALE133d REVIEWED: 4 (3M) [PATCH 6.12.y 3/6] cpuidle: menu: Tweak threshold use in get_typical_interval()
  2026-03-20 · Ionut Nechita <hidden>
• STALE133d REVIEWED: 4 (3M) [PATCH 6.12.y 1/6] cpuidle: menu: Drop a redundant local variable
  2026-03-20 · Ionut Nechita <hidden>
• STALE133d REVIEWED: 4 (3M) [PATCH 6.12.y 4/6] cpuidle: menu: Eliminate outliers on both ends of the sample set
  2026-03-20 · Ionut Nechita <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.

• STALE115d REVIEWED: 1 (0M) [PATCH v2] cpuidle: powerpc: avoid double clear when breaking snooze
  2026-03-11 · Shrikanth Hegde <hidden> · 1 Reviewed-by
• STALE133d REVIEWED: 1 (1M) [PATCH v2 6.12.y 6/6] cpuidle: menu: Optimize bucket assignment when next_timer_ns equals KTIME_MAX
  2026-03-21 · Ionut Nechita (Wind River) <hidden> · 1 Reviewed-by
• COLD28d REVIEWED: 1 (0M) [PATCH v22 05/13] mfd: psci-mfd: Add PSCI MFD driver for cpuidle-psci-domain cell
  2026-05-14 · Shivendra Pratap <hidden> · 1 Reviewed-by
• COOLING9d REVIEWED: 1 (0M) [PATCH v23 05/13] mfd: psci-mfd: Add PSCI MFD driver for cpuidle-psci-domain cell
  2026-07-14 · Shivendra Pratap <hidden> · 1 Reviewed-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.

• STALE158d [PATCH v4 1/3] cpuidle: riscv-sbi: Split PM domain init out of the cpuidle driver
  2026-01-08 · Nick Hu <hidden>
• STALE158d [PATCH v4 3/3] cpuidle: Add SiFive power provider driver
  2026-01-08 · Nick Hu <hidden>
• STALE148d [PATCH v2 4/4] cpuidle: menu: Remove single state handling
  2026-02-16 · Aboorva Devarajan <hidden>
• STALE148d [PATCH v2 3/4] cpuidle: teo: Remove single state handling
  2026-02-16 · Aboorva Devarajan <hidden>
• DORMANTno replies [PATCH] cpuidle: cleanup dead dependencies on CPU_IDLE in Kconfig
  2026-03-31 · Julian Braha <hidden>