[V2,2/4] cpufreq: governor: Process remote callback for shared policies

Message ID e41df6731e29c46f69955b0432befd6db9242f0b.1498712046.git.viresh.kumar@linaro.org
State New
Headers show
  • sched: cpufreq: Allow remote callbacks
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Commit Message

Viresh Kumar June 29, 2017, 5:26 a.m.
This patch updates the legacy governors (ondemand/conservative) to
process cpufreq utilization update hooks to be called for remote CPUs
(i.e. For updates to the runqueue of other non-local CPUs).

Based on initial work from Steve Muckle.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

 drivers/cpufreq/cpufreq_governor.c | 4 ++++
 1 file changed, 4 insertions(+)



diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c
index 47e24b5384b3..0b49fc8bb91d 100644
--- a/drivers/cpufreq/cpufreq_governor.c
+++ b/drivers/cpufreq/cpufreq_governor.c
@@ -275,6 +275,10 @@  static void dbs_update_util_handler(struct update_util_data *data, u64 time,
 	struct policy_dbs_info *policy_dbs = cdbs->policy_dbs;
 	u64 delta_ns, lst;
+	/* Allow remote callbacks only on the CPUs sharing cpufreq policy */
+	if (!cpumask_test_cpu(smp_processor_id(), policy_dbs->policy->cpus))
+		return;
 	 * The work may not be allowed to be queued up right now.
 	 * Possible reasons: