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cpufreq: governor: Always schedule work on the CPU running update 

Modify dbs_irq_work() to always schedule the process-context work
on the current CPU which also ran the dbs_update_util_handler()
that the irq_work being handled came from.

This causes the entire frequency update handling (involving the
"ondemand" or "conservative" governors) to be carried out by the
CPU whose frequency is to be updated and reduces the overall amount
of inter-CPU noise related to cpufreq.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Rafael J. Wysocki 2016-03-22 01:17:43 +01:00
parent 3bbf8fe3ae
commit 539a4c4247
1 changed files with 1 additions and 1 deletions
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2
drivers/cpufreq/cpufreq_governor.c
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@ -329,7 +329,7 @@ static void dbs_irq_work(struct irq_work *irq_work)
struct policy_dbs_info *policy_dbs;
policy_dbs = container_of(irq_work, struct policy_dbs_info, irq_work);
schedule_work(&policy_dbs->work);
schedule_work_on(smp_processor_id(), &policy_dbs->work);
}
static void dbs_update_util_handler(struct update_util_data *data, u64 time,