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Commit ff56b2f0 authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
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sched: activate task_hot() only on fair-scheduled tasks 



activate task_hot() only for fair-scheduled tasks (i.e. disable it
for RT tasks).

Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent da84d961

kernel/sched.c

+8 −3
Original line number Diff line number Diff line
@@ -2122,11 +2122,16 @@ static void pull_task(struct rq *src_rq, struct task_struct *p, 
 * Is this task likely cache-hot:

 */

static inline int

task_hot(struct task_struct *p, unsigned long long now, struct sched_domain *sd)

task_hot(struct task_struct *p, u64 now, struct sched_domain *sd)

{

	s64 delta = now - p->se.exec_start;

	s64 delta;



	return delta < (long long)sysctl_sched_migration_cost;

	if (p->sched_class != &fair_sched_class)

		return 0;



	delta = now - p->se.exec_start;



	return delta < (s64)sysctl_sched_migration_cost;

}



/*