sched: default to more agressive yield for SCHED_BATCH tasks
do more agressive yield for SCHED_BATCH tuned tasks: they are all about throughput anyway. This allows a gentler migration path for any apps that relied on stronger yield. Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -799,8 +799,9 @@ static void dequeue_task_fair(struct rq *rq, struct task_struct *p, int sleep)
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*/
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*/
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static void yield_task_fair(struct rq *rq)
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static void yield_task_fair(struct rq *rq)
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{
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{
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struct cfs_rq *cfs_rq = task_cfs_rq(rq->curr);
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struct task_struct *curr = rq->curr;
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struct sched_entity *rightmost, *se = &rq->curr->se;
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struct cfs_rq *cfs_rq = task_cfs_rq(curr);
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struct sched_entity *rightmost, *se = &curr->se;
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/*
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/*
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* Are we the only task in the tree?
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* Are we the only task in the tree?
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@ -808,7 +809,7 @@ static void yield_task_fair(struct rq *rq)
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if (unlikely(cfs_rq->nr_running == 1))
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if (unlikely(cfs_rq->nr_running == 1))
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return;
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return;
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if (likely(!sysctl_sched_compat_yield)) {
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if (likely(!sysctl_sched_compat_yield) && curr->policy != SCHED_BATCH) {
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__update_rq_clock(rq);
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__update_rq_clock(rq);
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/*
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/*
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* Update run-time statistics of the 'current'.
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* Update run-time statistics of the 'current'.
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