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sched_info_switch not being called according to documentation (10545)

PATCH In review David Simner 2 participants 2 messages Apr 29, 2008

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David Simner

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PATCH 1/1 sched_info_switch not being called according to documentation (10545)

Hi,

http://bugzilla.kernel.org/show_bug.cgi?id=10545

sched_stats.h says that __sched_info_switch is "called when prev != next" in the comment. sched.c should therefore do that, see the patch below:

David

kernel/sched.c +2 -2
@@ -3944,9 +3944,9 @@
 	prev->sched_class->put_prev_task(rq, prev);
 	next = pick_next_task(rq, prev);
 
-	sched_info_switch(prev, next);
-
 	if (likely(prev != next)) {
+		sched_info_switch(prev, next);
+
 		rq->nr_switches++;
 		rq->curr = next;
 		++*switch_count;