From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date: Fri, 9 Nov 2007 21:39:37 +0000 (+0100)
Subject: sched: fix vslice
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=10b777246c6953100099af1870d35c8b24d49b12;p=linux-beck.git

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>
---

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;