commit 889dfafe836ac9bb711f73d07a4c044cae177c0b
author Oleg Nesterov <oleg@tv-sign.ru> Fri Nov 04 18:54:30 2005 +0300
committer Linus Torvalds <torvalds@g5.osdl.org> Fri Nov 04 10:45:28 2005 -0800
tree ca46672a0d807f82e5d1b13e1b9dff0b561d5f36
parent c8ebce6eeb1f6f83fd8c0de209f1f7b627220a81

[PATCH] improve scheduler fairness a bit

Do not transfer remaining time slice to another cpu on process exit.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

kernel/sched.c

diff --git a/kernel/sched.c b/kernel/sched.c
index 340dd23..b4f4eb6 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -1468,7 +1468,7 @@
 	 * the sleep_avg of the parent as well.
 	 */
 	rq = task_rq_lock(p->parent, &flags);
-	if (p->first_time_slice) {
+	if (p->first_time_slice && task_cpu(p) == task_cpu(p->parent)) {
 		p->parent->time_slice += p->time_slice;
 		if (unlikely(p->parent->time_slice > task_timeslice(p)))
 			p->parent->time_slice = task_timeslice(p);