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Power management fixes for 7.2-rc1

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- Remove a misguided warning along with an inaccurate comment next to
    it from the cpuidle core (Rafael Wysocki)
 
  - Clear need_freq_update as appropriate in the .adjust_perf()
    path of the schedutil cpufreq governor to avoid calling
    cpufreq_driver_adjust_perf() unnecessarily on every scheduler
    utilization update (Zhongqiu Han)
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Merge tag 'pm-7.2-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "These fix the schedutil cpufreq governor and drop a bogus warning
  from the cpuidle core:

   - Remove a misguided warning along with an inaccurate comment
     next to it from the cpuidle core (Rafael Wysocki)

   - Clear need_freq_update as appropriate in the .adjust_perf()
     path of the schedutil cpufreq governor to avoid calling
     cpufreq_driver_adjust_perf() unnecessarily on every scheduler
     utilization update (Zhongqiu Han)"

* tag 'pm-7.2-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpuidle: Allow exit latency to exceed target residency
  cpufreq: schedutil: Fix uncleared need_freq_update on the .adjust_perf() path
This commit is contained in:
Linus Torvalds 2026-06-26 13:14:18 -07:00
commit e27d4bbe0d
2 changed files with 1 additions and 8 deletions
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8
drivers/cpuidle/driver.c
View File

@ -195,14 +195,6 @@ static void __cpuidle_driver_init(struct cpuidle_driver *drv)
s->exit_latency_ns = 0;
else
s->exit_latency = div_u64(s->exit_latency_ns, NSEC_PER_USEC);
/*
* Warn if the exit latency of a CPU idle state exceeds its
* target residency which is assumed to never happen in cpuidle
* in multiple places.
*/
if (s->exit_latency_ns > s->target_residency_ns)
pr_warn("Idle state %d target residency too low\n", i);
}
}

1
kernel/sched/cpufreq_schedutil.c
View File

@ -486,6 +486,7 @@ static void sugov_update_single_perf(struct update_util_data *hook, u64 time,
cpufreq_driver_adjust_perf(sg_policy->policy, sg_cpu->bw_min,
sg_cpu->util, max_cap);
sg_policy->need_freq_update = false;
sg_policy->last_freq_update_time = time;
}