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>
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 3ecbfd0..410b77a 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -485,7 +485,9 @@
vruntime += sched_vslice_add(cfs_rq, se);
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 = max_t(s64, vruntime, se->vruntime);