cpu frequency scaling framework · Maintained

Maintainers

• M "Rafael J. Wysocki" <rafael@kernel.org>
• M Viresh Kumar <viresh.kumar@linaro.org>

Paths

• F Documentation/admin-guide/pm/cpufreq.rst
• F Documentation/admin-guide/pm/intel_pstate.rst
• F Documentation/cpu-freq/
• F Documentation/devicetree/bindings/cpufreq/
• F drivers/cpufreq/
• F include/linux/cpufreq.h
• F include/linux/sched/cpufreq.h
• F kernel/sched/cpufreq*.c
• F rust/kernel/cpufreq.rs
• F tools/testing/selftests/cpufreq/

Last 30 days

Most active threads (last 7 days)

• WARM2d [PATCH v2 0/2] cpufreq: acpi-cpufreq: fix P-state index mismatch in freq lookups
  2026-08-13 09:02 · 2 replies in 7d · lirongqing <hidden>
• DORMANTno replies [RFC][PATCH v3 0/8] ACPI: CPPC: Resource Priority Register support and sysfs interface
  2026-08-12 01:54 · 1 reply in 7d · Lifeng Zheng <zhenglifeng1@huawei.com>
• DORMANTno replies Linux 7.1.8
  2026-08-09 18:36 · 1 reply in 7d · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• DORMANTno replies Linux 6.18.44
  2026-08-09 18:36 · 1 reply in 7d · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• COOLING6d Linux 6.12.103
  2026-08-09 18:36 · 1 reply in 7d · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• COOLING6d Linux 6.6.151
  2026-08-09 18:36 · 1 reply in 7d · Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Active reviewers (last 30 days)

• Mario Limonciello (AMD) <superm1@kernel.org>
  12 attestations (1 Acked-by, 11 Reviewed-by) · last on 2026-07-27
• Michael Kelley <hidden>
  4 attestations (2 Reviewed-by, 2 Tested-by) · last on 2026-07-21
• Pierre Gondois <pierre.gondois@arm.com>
  3 attestations (3 Suggested-by) · last on 2026-08-07
• Zhongqiu Han <hidden>
  2 attestations (1 Reported-by, 1 Reviewed-by) · last on 2026-08-13
• Christian Loehle <christian.loehle@arm.com>
  2 attestations (2 Suggested-by) · last on 2026-08-06
• Sumit Gupta <sumitg@nvidia.com>
  2 attestations (2 Suggested-by) · last on 2026-08-03
• Kalpana Shetty <hidden>
  2 attestations (2 Suggested-by) · last on 2026-07-27
• Mario Limonciello <mario.limonciello@amd.com>
  2 attestations (2 Suggested-by) · last on 2026-07-27
• K Prateek Nayak <kprateek.nayak@amd.com>
  2 attestations (1 Reviewed-by, 1 Tested-by) · last on 2026-07-21
• Qiliang Yuan <hidden>
  1 attestation (1 Co-developed-by) · last on 2026-07-29

Recent patches

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

• DORMANTno replies [PATCH v2 2/2] cpufreq: acpi-cpufreq: fix P-state index mismatch in get_cur_freq_on_cpu()
  2026-08-13 · lirongqing <hidden>
• WARM2d [PATCH v2 1/2] cpufreq: acpi-cpufreq: fix P-state index mismatch in extract_io()
  2026-08-13 · lirongqing <hidden>
• WARM3d [PATCH v3 8/8] cpufreq: cppc: Expose Resource Priority attributes via sysfs
  2026-08-12 · Lifeng Zheng <zhenglifeng1@huawei.com>
• COOLING6d Re: Linux 7.1.8
  2026-08-09 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• COOLING6d Re: Linux 6.18.44
  2026-08-09 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• DORMANTno replies Re: Linux 6.12.103
  2026-08-09 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• DORMANTno replies Re: Linux 6.6.151
  2026-08-09 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• DORMANTno replies [PATCH v7 3/3] cpufreq: CPPC: Reflect the OSPM nominal in boost and limits
  2026-08-07 · Sumit Gupta <sumitg@nvidia.com>
• COOLING8d [PATCH v7 2/3] cpufreq: CPPC: Add ospm_nominal_freq attribute
  2026-08-07 · Sumit Gupta <sumitg@nvidia.com>
• COOLING5d [PATCH v5 3/3] arch_topology: Add topology_update_cpu_capacity() for runtime updates
  2026-08-07 · Xueqin Luo <hidden>
• COOLING5d [PATCH v5 2/3] cpufreq: cppc: Refactor autonomous perf bounds into helper
  2026-08-07 · Xueqin Luo <hidden>
• COOLING5d [PATCH v5 1/3] cpufreq: cppc: Add update_limits support for Highest Performance changes
  2026-08-07 · Xueqin Luo <hidden>
• DORMANTno replies [PATCH v4 4/4] cpufreq: CPPC: Preserve OSPM-set registers across suspend/resume
  2026-08-06 · Sumit Gupta <sumitg@nvidia.com>
• COOLING9d [PATCH v4 3/4] cpufreq: CPPC: Preserve OSPM-set registers across hotplug and unload
  2026-08-06 · Sumit Gupta <sumitg@nvidia.com>
• COOLING9d [PATCH v4 2/4] ACPI: CPPC: Make autonomous selection helpers take a u64
  2026-08-06 · Sumit Gupta <sumitg@nvidia.com>
• COOLING9d [PATCH v4 1/4] cpufreq: CPPC: Keep the policy across CPU hotplug
  2026-08-06 · Sumit Gupta <sumitg@nvidia.com>
• COOLING9d [PATCH] cpufreq: imx6q: fix devres accumulation across driver rebind
  2026-08-06 · Karl Mehltretter <hidden>
• COOLING9d [PATCH] cpufreq: imx6q: fix out-of-bounds write when probed more than once
  2026-08-06 · Karl Mehltretter <hidden>
• COOLING5d [PATCH 1/2] cpufreq: allow cpuinfo max to decrease when boost is disabled
  2026-08-06 · Sibi Sankar <sibi.sankar@oss.qualcomm.com>
• COOLING11d [PATCH v2 8/8] cpufreq: cppc: Expose Resource Priority attributes via sysfs
  2026-08-04 · Lifeng Zheng <zhenglifeng1@huawei.com>
• COOLING10d [PATCH 1/3] ACPI: CPPC: Reject desired_perf reads on _CPC revision 4+
  2026-08-03 · Christian Loehle <christian.loehle@arm.com>
• COOLING12d [PATCH v3 1/3] ACPI: CPPC: Reject desired_perf reads on ACPI 6.6+
  2026-08-03 · Christian Loehle <christian.loehle@arm.com>
• COOLING12d Re: Linux 7.1.6
  2026-08-03 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• COOLING12d Re: Linux 6.18.42
  2026-08-03 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• DORMANTno replies Re: Linux 6.12.101
  2026-08-03 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• COOLING11d [PATCH] cpufreq: intel_pstate: Sync policy->cur to the pinned pstate
  2026-07-29 · Jing Wu <hidden>
• COLD16d [RFC PATCH 3/4] cpufreq/amd-pstate: Add per-core EPP boost for recently-busy CPUs
  2026-07-28 · David Vernet <void@manifault.com>
• COLD16d [RFC PATCH 2/4] cpufreq/amd-pstate: Update cppc_req_cached before writing the MSR
  2026-07-28 · David Vernet <void@manifault.com>
• COLD16d IN LINUX-NEXT [RFC PATCH 1/4] cpufreq/amd-pstate: Document missing kernel-doc members
  2026-07-28 · David Vernet <void@manifault.com>
• COLD19d [PATCH] cpufreq: powernow-k8: Fix possible memory leak in powernowk8_cpu_init()
  2026-07-27 · Abdun Nihaal <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.

• STALE148d REVIEWED: 1 (1M) [PATCH V2] cpufreq: conservative: Reset requested_freq on limits change
  2026-03-20 · Viresh Kumar <viresh.kumar@linaro.org> · 1 Tested-by
• STALE137d REVIEWED: 1 (1M) [PATCH v8 2/2] cpufreq: Add boost_freq_req QoS request
  2026-03-26 · Pierre Gondois <pierre.gondois@arm.com> · 1 Reviewed-by
• DORMANTno replies REVIEWED: 1 (0M) [for-next][PATCH 2/3] cpufreq: Use trace_call__##name() at guarded tracepoint call sites
  2026-03-29 · Steven Rostedt <rostedt@kernel.org> · 1 Reviewed-by
• STALE135d REVIEWED: 1 (0M) [PATCH v8 4/5] cpufreq/amd-pstate: Add support for raw EPP writes
  2026-04-02 · "Mario Limonciello (AMD)" <superm1@kernel.org> · 1 Reviewed-by
• STALE135d REVIEWED: 1 (0M) [PATCH v8 5/5] cpufreq/amd-pstate-ut: Add a unit test for raw EPP
  2026-04-02 · "Mario Limonciello (AMD)" <superm1@kernel.org> · 1 Reviewed-by
• STALE93d REVIEWED: 1 (1M) [PATCH v4] cpufreq: cppc: mask Desired_Excursion when autonomous selection is enabled
  2026-05-13 · Xueqin Luo <hidden> · 1 Reviewed-by
• STALE80d REVIEWED: 4 (4M) [PATCH v3 4/4] cpufreq/amd-pstate: Get highest freq from CPPC if available
  2026-05-14 · Mario Limonciello <mario.limonciello@amd.com> · 1 Reviewed-by, 1 Tested-by
• STALE87d REVIEWED: 2 (2M) [PATCH v5] cpufreq: cppc: mask Desired_Excursion when autonomous selection is enabled
  2026-05-15 · Xueqin Luo <hidden> · 2 Reviewed-by
• STALE86d REVIEWED: 1 (0M) [PATCH v2 2/2] cpufreq: qcom: Add cpufreq scaling support for Qualcomm Shikra SoC
  2026-05-19 · Imran Shaik <hidden> · 1 Reviewed-by
• STALE85d REVIEWED: 1 (0M) [PATCH v3 2/2] cpufreq: qcom: Add cpufreq scaling support for Qualcomm Shikra SoC
  2026-05-21 · Imran Shaik <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.

• DORMANTno replies Re: Linux 5.15.198
  2026-01-19 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• DORMANTno replies Re: Linux 5.10.248
  2026-01-19 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• STALE200d [PATCH v6 9/9] cpufreq: CPPC: Update cached perf_ctrls on sysfs write
  2026-01-20 · Sumit Gupta <sumitg@nvidia.com>
• STALE204d [PATCH 2/3] cpufreq: intel_pstate: Remove refresh logic in hybrid_init_cpu_capacity_scaling()
  2026-01-23 · Yaxiong Tian <hidden>
• DORMANTno replies [PATCH 3/3] cpufreq: intel_pstate: Enable toggling cpu_capacity_scaling on hybrid platforms during SMT transitions
  2026-01-23 · Yaxiong Tian <hidden>
• STALE190d [PATCH 4/6] cpufreq: Update .set_boost() callbacks to rely on boost_freq_req
  2026-01-26 · Pierre Gondois <pierre.gondois@arm.com>
• STALE190d [RFC PATCH 6/6] cpufreq/freq_table: Allow decreasing cpuinfo.max_freq
  2026-01-26 · Pierre Gondois <pierre.gondois@arm.com>
• STALE191d [PATCH v7 1/7] ACPI: CPPC: Add cppc_get_perf() API to read performance controls
  2026-01-29 · Sumit Gupta <sumitg@nvidia.com>
• STALE191d [PATCH v7 5/7] ACPI: CPPC: add APIs and sysfs interface for perf_limited
  2026-01-29 · Sumit Gupta <sumitg@nvidia.com>
• STALE191d [PATCH v7 7/7] cpufreq: CPPC: Update cached perf_ctrls on sysfs write
  2026-01-29 · Sumit Gupta <sumitg@nvidia.com>