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Date: Mon, 28 Apr 2014 11:57:25 +0900 From: "yjay.kim" <yjay.kim@....com> To: Ingo Molnar <mingo@...hat.com>, Peter Zijlstra <peterz@...radead.org> Cc: linux-kernel@...r.kernel.org, "yjay.kim" <yjay.kim@....com> Subject: [PATCH] sched/deadline: remove dl_new checking condition from dl_task_timer() From: "yjay.kim" <yjay.kim@....com> yield_task_dl() sets dl.dl_new as 1 and dequeue current dl task. After that it expects that next bandwidth timer callback `dl_task_timer()` will replenish budget of dl task and enqueue it again. But current dl_task_timer() does nothing in case dl.dl_new is 1. So when dl task calls sched_yield(), it will never be scheduled again. dl_task_timer() should works in case dl_new is 1. Signed-off-by: yjay.kim <yjay.kim@....com> --- kernel/sched/deadline.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index 27ef409..6fb4004 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -522,7 +522,7 @@ static enum hrtimer_restart dl_task_timer(struct hrtimer *timer) * different from SCHED_DEADLINE or changed its reservation * parameters (through sched_setscheduler()). */ - if (!dl_task(p) || dl_se->dl_new) + if (!dl_task(p)) goto unlock; sched_clock_tick(); -- 1.7.9.5 -- 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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