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Commit ee198063 authored by Satya Durga Srinivasu Prabhala's avatar Satya Durga Srinivasu Prabhala
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sched/fair: Always try to find energy efficient CPU in wakeup path 



Right now, if rd is overutilized, we bail out from
find_energy_efficient_cpu(). Instead, always try to find  energy
efficient CPU to be more energy efficient. While at it use
sd_asym_cpucapacity find start_sd in find_best_target() instead of
sd_asym_packing.

Change-Id: I3b2e953aff2ff70da59f735a1c20c14f0ba17ba3
Signed-off-by: default avatarSatya Durga Srinivasu Prabhala <satyap@codeaurora.org>
parent 377e49df

kernel/sched/fair.c

+2 −2
Original line number Diff line number Diff line
@@ -6735,7 +6735,7 @@ static void find_best_target(struct sched_domain *sd, cpumask_t *cpus, 
		goto out;



	/* Find SD for the start CPU */

	start_sd = rcu_dereference(per_cpu(sd_asym_packing, start_cpu));

	start_sd = rcu_dereference(per_cpu(sd_asym_cpucapacity, start_cpu));

	if (!start_sd)

		goto out;
@@ -7391,7 +7391,7 @@ static int find_energy_efficient_cpu(struct task_struct *p, int prev_cpu, int sy 


	rcu_read_lock();

	pd = rcu_dereference(rd->pd);

	if (!pd || READ_ONCE(rd->overutilized))

	if (!pd)

		goto fail;



	/*