From 889dfafe836ac9bb711f73d07a4c044cae177c0b Mon Sep 17 00:00:00 2001
From: Oleg Nesterov <oleg@tv-sign.ru>
Date: Fri, 4 Nov 2005 18:54:30 +0300
Subject: [PATCH] [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 | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/sched.c b/kernel/sched.c
index 340dd238c16da..b4f4eb6135372 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -1468,7 +1468,7 @@ void fastcall sched_exit(task_t *p)
* 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);
--
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