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Date: Fri, 31 Oct 2014 06:39:35 +0800 From: Wanpeng Li <wanpeng.li@...ux.intel.com> To: Ingo Molnar <mingo@...hat.com>, Peter Zijlstra <peterz@...radead.org> Cc: Juri Lelli <juri.lelli@....com>, Kirill Tkhai <ktkhai@...allels.com>, juri.lelli@...il.com, linux-kernel@...r.kernel.org, Wanpeng Li <wanpeng.li@...ux.intel.com> Subject: [PATCH v3 5/6] sched/deadline: reschedule from switched_from_dl() after a successful pull In switched_from_dl() we have to issue a resched if we successfully pulled some task from other cpus. This patch also aligns the behavior with -rt. Suggested-by: Juri Lelli <juri.lelli@....com> Signed-off-by: Wanpeng Li <wanpeng.li@...ux.intel.com> --- v1 -> v2: * align the behaviour with -rt. kernel/sched/deadline.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index 1c09751..2b23d50 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -1623,8 +1623,11 @@ static void switched_from_dl(struct rq *rq, struct task_struct *p) * this is the right place to try to pull some other one * from an overloaded cpu, if any. */ - if (!rq->dl.dl_nr_running) - pull_dl_task(rq); + if (!task_on_rq_queued(p) || rq->dl.dl_nr_running) + return; + + if (pull_dl_task(rq)) + resched_curr(rq); #endif } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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