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Merge branch 'pm-cpufreq-sched'

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* pm-cpufreq-sched:
  cpufreq: schedutil: Always process remote callback with slow switching
  cpufreq: schedutil: Don't restrict kthread to related_cpus unnecessarily
  cpufreq: Return 0 from ->fast_switch() on errors
  cpufreq: Simplify cpufreq_can_do_remote_dvfs()
  cpufreq: Process remote callbacks from any CPU if the platform permits
  sched: cpufreq: Allow remote cpufreq callbacks
  cpufreq: schedutil: Use unsigned int for iowait boost
  cpufreq: schedutil: Make iowait boost more energy efficient
This commit is contained in:
Rafael J. Wysocki 2017-09-04 00:05:22 +02:00
commit 08a10002be
10 changed files with 116 additions and 31 deletions
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20
include/linux/cpufreq.h
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@ -127,6 +127,15 @@ struct cpufreq_policy {
*/
unsigned int transition_delay_us;
/*
* Remote DVFS flag (Not added to the driver structure as we don't want
* to access another structure from scheduler hotpath).
*
* Should be set if CPUs can do DVFS on behalf of other CPUs from
* different cpufreq policies.
*/
bool dvfs_possible_from_any_cpu;
/* Cached frequency lookup from cpufreq_driver_resolve_freq. */
unsigned int cached_target_freq;
int cached_resolved_idx;
@ -562,6 +571,17 @@ struct governor_attr {
size_t count);
};
static inline bool cpufreq_can_do_remote_dvfs(struct cpufreq_policy *policy)
{
/*
* Allow remote callbacks if:
* - dvfs_possible_from_any_cpu flag is set
* - the local and remote CPUs share cpufreq policy
*/
return policy->dvfs_possible_from_any_cpu ||
cpumask_test_cpu(smp_processor_id(), policy->cpus);
}
/*********************************************************************
* FREQUENCY TABLE HELPERS *
*********************************************************************/