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: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -2122,11 +2122,16 @@ static void pull_task(struct rq *src_rq, struct task_struct *p,
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* Is this task likely cache-hot:
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*/
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static inline int
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task_hot(struct task_struct *p, unsigned long long now, struct sched_domain *sd)
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task_hot(struct task_struct *p, u64 now, struct sched_domain *sd)
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{
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s64 delta = now - p->se.exec_start;
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s64 delta;
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return delta < (long long)sysctl_sched_migration_cost;
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if (p->sched_class != &fair_sched_class)
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return 0;
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delta = now - p->se.exec_start;
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return delta < (s64)sysctl_sched_migration_cost;
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}
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/*
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