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Commit 6cbf1c12 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

sched: do not hurt SCHED_BATCH on wakeup 



measurements by Yanmin Zhang have shown that SCHED_BATCH tasks benefit
if they run the same place_entity() logic as SCHED_OTHER tasks - so
uniformize behavior in this area.

Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 2bacec8c

kernel/sched_fair.c

+1 −2
Original line number Original line Diff line number Diff line
@@ -511,8 +511,7 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial) 




	if (!initial) {

	if (!initial) {

		/* sleeps upto a single latency don't count. */

		/* sleeps upto a single latency don't count. */

		if (sched_feat(NEW_FAIR_SLEEPERS) && entity_is_task(se) &&

		if (sched_feat(NEW_FAIR_SLEEPERS) && entity_is_task(se))

				task_of(se)->policy != SCHED_BATCH)

			vruntime -= sysctl_sched_latency;

			vruntime -= sysctl_sched_latency;





		/* ensure we never gain time by being placed backwards. */

		/* ensure we never gain time by being placed backwards. */