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sched: entity_key() fix 

entity_key() fix - we'd occasionally end up with a 0 vruntime
in the !initial case.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
This commit is contained in:
Ingo Molnar 2007-10-15 17:00:11 +02:00
parent ddc9729750
commit 8465e792e8
1 changed files with 10 additions and 7 deletions
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17
kernel/sched_fair.c
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@ -479,13 +479,16 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial)
if (initial && sched_feat(START_DEBIT))
vruntime += __sched_vslice(cfs_rq->nr_running + 1);
if (!initial && sched_feat(NEW_FAIR_SLEEPERS)) {
s64 latency = cfs_rq->min_vruntime - se->last_min_vruntime;
if (latency < 0 || !cfs_rq->nr_running)
latency = 0;
else
latency = min_t(s64, latency, sysctl_sched_latency);
vruntime -= latency;
if (!initial) {
if (sched_feat(NEW_FAIR_SLEEPERS)) {
s64 latency = cfs_rq->min_vruntime - se->last_min_vruntime;
if (latency < 0 || !cfs_rq->nr_running)
latency = 0;
else
latency = min_t(s64, latency, sysctl_sched_latency);
vruntime -= latency;
}
vruntime = max(vruntime, se->vruntime);
}
se->vruntime = vruntime;