We don't need to bother searching if the task cannot be migrated
Signed-off-by: Gregory Haskins <[email protected]>
Signed-off-by: Steven Rostedt <[email protected]>
---
kernel/sched_rt.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index e007d2b..fe0b43f 100644
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -174,7 +174,8 @@ static int select_task_rq_rt(struct task_struct *p, int sync)
* that is just being woken and probably will have
* cold cache anyway.
*/
- if (unlikely(rt_task(rq->curr))) {
+ if (unlikely(rt_task(rq->curr)) &&
+ (p->nr_cpus_allowed > 1)) {
int cpu = find_lowest_rq(p);
return (cpu == -1) ? task_cpu(p) : cpu;
--
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