From 10b777246c6953100099af1870d35c8b24d49b12 Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date: Fri, 9 Nov 2007 22:39:37 +0100
Subject: [PATCH] sched: fix vslice
vslice was missing a factor NICE_0_LOAD, as weight is in
weight*NICE_0_LOAD units.
the effect of this bug was larger initial slices and
thus latency-noisier forks.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
kernel/sched_fair.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 01859f662ab7..62b057603f07 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -259,6 +259,7 @@ static u64 __sched_vslice(unsigned long rq_weight, unsigned long nr_running)
{
u64 vslice = __sched_period(nr_running);
+ vslice *= NICE_0_LOAD;
do_div(vslice, rq_weight);
return vslice;
--
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