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cpufreq: schedutil: Don't restrict kthread to related_cpus unnecessarily

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Utilization update callbacks are now processed remotely, even on the
CPUs that don't share cpufreq policy with the target CPU (if
dvfs_possible_from_any_cpu flag is set).

But in non-fast switch paths, the frequency is changed only from one of
policy->related_cpus. This happens because the kthread which does the
actual update is bound to a subset of CPUs (i.e. related_cpus).

Allow frequency to be remotely updated as well (i.e. call
__cpufreq_driver_target()) if dvfs_possible_from_any_cpu flag is set.

Reported-by: Pavan Kondeti <pkondeti@codeaurora.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar 2017-08-10 09:50:55 +05:30 committed by Rafael J. Wysocki
parent 209887e6b9
commit e2cabe48c2
1 changed files with 5 additions and 1 deletions
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6
kernel/sched/cpufreq_schedutil.c
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@ -487,7 +487,11 @@ static int sugov_kthread_create(struct sugov_policy *sg_policy)
}
sg_policy->thread = thread;
kthread_bind_mask(thread, policy->related_cpus);
/* Kthread is bound to all CPUs by default */
if (!policy->dvfs_possible_from_any_cpu)
kthread_bind_mask(thread, policy->related_cpus);
init_irq_work(&sg_policy->irq_work, sugov_irq_work);
mutex_init(&sg_policy->work_lock);