Commit 6bfa687c authored Oct 04, 2013 by Shawn Bohrer Committed by Ingo Molnar Oct 06, 2013

sched/rt: Remove redundant nr_cpus_allowed test



In 76854c7e ("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,
which can now be removed.

Signed-off-by: Shawn Bohrer <sbohrer@rgmadvisors.com>
Reviewed-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Mike Galbraith <mgalbraith@suse.de>
Cc: tomk@rgmadvisors.com
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1380914693-24634-1-git-send-email-shawn.bohrer@gmail.com


Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent fb869b6e

kernel/sched/rt.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -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)