Peter Zijlstra wrote:
--- Subject: sched: adjust timer_slack_ns on scheduler policy change From: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> Date: Thu Mar 12 15:01:02 CET 2009 Ensure RT tasks have 0 timer slack. Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> --- kernel/sched.c | 2 ++ 1 file changed, 2 insertions(+) Index: linux-2.6/kernel/sched.c =================================================================== --- linux-2.6.orig/kernel/sched.c +++ linux-2.6/kernel/sched.c @@ -5511,10 +5511,12 @@ __setscheduler(struct rq *rq, struct tas case SCHED_NORMAL: case SCHED_BATCH: case SCHED_IDLE: + p->timer_slack_ns = p->default_timer_slack_ns; p->sched_class = &fair_sched_class; break; case SCHED_FIFO: case SCHED_RR: + p->timer_slack_ns = 0; p->sched_class = &rt_sched_class; break; }Looking at the default_timer_slack_ns stuff, do we want something like the below?
the original idea was that you had a default slack that you got from exec time, and then something you could just tweak around yourself independently.... this would throw that out of the window. -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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