Commit-ID: 9f96742a13135e6c609cc99a3a458402af3c8f31 Gitweb: http://git.kernel.org/tip/9f96742a13135e6c609cc99a3a458402af3c8f31 Author: Yao Dongdong <[email protected]> AuthorDate: Tue, 28 Oct 2014 04:08:06 +0000 Committer: Ingo Molnar <[email protected]> CommitDate: Tue, 4 Nov 2014 07:17:51 +0100
sched: Check if we got a shallowest_idle_cpu before searching for least_loaded_cpu Idle cpu is idler than non-idle cpu, so we needn't search for least_loaded_cpu after we have found an idle cpu. Signed-off-by: Yao Dongdong <[email protected]> Reviewed-by: Srikar Dronamraju <[email protected]> Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Cc: Linus Torvalds <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]> --- kernel/sched/fair.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index ec32c26d..d03d76d 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -4641,7 +4641,7 @@ find_idlest_cpu(struct sched_group *group, struct task_struct *p, int this_cpu) latest_idle_timestamp = rq->idle_stamp; shallowest_idle_cpu = i; } - } else { + } else if (shallowest_idle_cpu == -1) { load = weighted_cpuload(i); if (load < min_load || (load == min_load && i == this_cpu)) { min_load = load; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
