From: Ingo Molnar Date: Tue, 4 Dec 2007 16:04:39 +0000 (+0100) Subject: sched: default to more agressive yield for SCHED_BATCH tasks X-Git-Tag: v2.6.24-rc5~113^2 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=db292ca302e83534f5f0f7139e13d7e6976e51f9;p=linux-2.6 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 --- diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index 37bb265598..c33f0ceb3d 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -799,8 +799,9 @@ static void dequeue_task_fair(struct rq *rq, struct task_struct *p, int sleep) */ static void yield_task_fair(struct rq *rq) { - struct cfs_rq *cfs_rq = task_cfs_rq(rq->curr); - struct sched_entity *rightmost, *se = &rq->curr->se; + struct task_struct *curr = rq->curr; + struct cfs_rq *cfs_rq = task_cfs_rq(curr); + struct sched_entity *rightmost, *se = &curr->se; /* * Are we the only task in the tree? @@ -808,7 +809,7 @@ static void yield_task_fair(struct rq *rq) if (unlikely(cfs_rq->nr_running == 1)) return; - if (likely(!sysctl_sched_compat_yield)) { + if (likely(!sysctl_sched_compat_yield) && curr->policy != SCHED_BATCH) { __update_rq_clock(rq); /* * Update run-time statistics of the 'current'.