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 01859f662ab7c834826f9197e93ebe9d44ad548a..62b057603f07b2dd5ce79e47d891ceecd835e827 100644 (file)
--- 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;