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sched: disable sleeper_fairness on SCHED_BATCH 

disable sleeper fairness for batch tasks - they are about
batch processing after all.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2007-10-15 17:00:14 +02:00 committed by Ingo Molnar
parent 810e95ccd5
commit 8ca0e14ffb
1 changed files with 3 additions and 1 deletions
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4
kernel/sched_fair.c
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@ -485,7 +485,9 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial)
vruntime += sched_vslice_add(cfs_rq, se); vruntime += sched_vslice_add(cfs_rq, se);
if (!initial) { if (!initial) {
if (sched_feat(NEW_FAIR_SLEEPERS)) struct task_struct *p = container_of(se, struct task_struct, se);
if (sched_feat(NEW_FAIR_SLEEPERS) && p->policy != SCHED_BATCH)
vruntime -= sysctl_sched_latency; vruntime -= sysctl_sched_latency;
vruntime = max_t(s64, vruntime, se->vruntime); vruntime = max_t(s64, vruntime, se->vruntime);