sched: do not hurt SCHED_BATCH on wakeup

Ingo Molnar · Ingo Molnar · commit 6cbf1c126cf6 · 2007-12-18T15:21:13.000+01:00
measurements by Yanmin Zhang have shown that SCHED_BATCH tasks benefit
if they run the same place_entity() logic as SCHED_OTHER tasks - so
uniformize behavior in this area.

Signed-off-by: Ingo Molnar &lt;mingo@elte.hu&gt;
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
@@ -511,8 +511,7 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial)
 
 	if (!initial) {
 		/* sleeps upto a single latency don't count. */
-		if (sched_feat(NEW_FAIR_SLEEPERS) && entity_is_task(se) &&
-				task_of(se)->policy != SCHED_BATCH)
+		if (sched_feat(NEW_FAIR_SLEEPERS) && entity_is_task(se))
 			vruntime -= sysctl_sched_latency;
 
 		/* ensure we never gain time by being placed backwards. */
