[PATCH] sched/rt: Remove redundant nr_cpus_allowed test

From: Shawn Bohrer
Date: Fri Oct 04 2013 - 15:25:52 EST


From: Shawn Bohrer <sbohrer@xxxxxxxxxxxxxxx>

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@xxxxxxxxxxxxxxx>
---
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

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