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Date: Fri, 4 Oct 2013 14:24:53 -0500 From: Shawn Bohrer <shawn.bohrer@...il.com> To: Ingo Molnar <mingo@...hat.com>, Peter Zijlstra <peterz@...radead.org> Cc: linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>, Mike Galbraith <mgalbraith@...e.de>, tomk@...advisors.com, Shawn Bohrer <sbohrer@...advisors.com> Subject: [PATCH] sched/rt: Remove redundant nr_cpus_allowed test From: Shawn Bohrer <sbohrer@...advisors.com> In 76854c7e8f3f4172fef091e78d88b3b751463ac6 "sched: Use rt.nr_cpus_allowed to recover select_task_rq() cycles" an optimization was added to select_task_rq_rt() that immediately returns when p->nr_cpus_allowed == 1 at the beginning of the function. This makes the latter p->nr_cpus_allowed > 1 check redundant and can be removed. Signed-off-by: Shawn Bohrer <sbohrer@...advisors.com> --- kernel/sched/rt.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c index 01970c8..ceebfba 100644 --- a/kernel/sched/rt.c +++ b/kernel/sched/rt.c @@ -1213,8 +1213,7 @@ select_task_rq_rt(struct task_struct *p, int sd_flag, int flags) */ if (curr && unlikely(rt_task(curr)) && (curr->nr_cpus_allowed < 2 || - curr->prio <= p->prio) && - (p->nr_cpus_allowed > 1)) { + curr->prio <= p->prio)) { int target = find_lowest_rq(p); if (target != -1) -- 1.8.1.4 -- 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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