Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=17b3279b48835eb522d842eae16f541da3729c8a
Commit: 17b3279b48835eb522d842eae16f541da3729c8a
Parent: e1f47d891c0f00769d6d40ac5740f943e998d089
Author: Gregory Haskins <[EMAIL PROTECTED]>
AuthorDate: Fri Jan 25 21:08:13 2008 +0100
Committer: Ingo Molnar <[EMAIL PROTECTED]>
CommitDate: Fri Jan 25 21:08:13 2008 +0100
sched: break out early if RT task cannot be migrated
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]>
Signed-off-by: Ingo Molnar <[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 9becc37..72c8132 100644
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -176,7 +176,8 @@ 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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