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revert "sched: fix fair sleepers" 

revert "sched: fix fair sleepers" (e22ecef1d2),
because it is causing audio skipping, see:

   http://bugzilla.kernel.org/show_bug.cgi?id=10428

the patch is correct and the real cause of the skipping is not
understood (tracing makes it go away), but time has run out so we'll
revert it and re-try in 2.6.26.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2008-04-14 08:50:02 +02:00
parent 120dd64cac
commit e2df9e0905
1 changed files with 2 additions and 4 deletions
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6
kernel/sched_fair.c
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@ -510,10 +510,8 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial)
if (!initial) { if (!initial) {
/* sleeps upto a single latency don't count. */ /* sleeps upto a single latency don't count. */
if (sched_feat(NEW_FAIR_SLEEPERS)) { if (sched_feat(NEW_FAIR_SLEEPERS))
vruntime -= calc_delta_fair(sysctl_sched_latency, vruntime -= sysctl_sched_latency;
&cfs_rq->load);
}
/* ensure we never gain time by being placed backwards. */ /* ensure we never gain time by being placed backwards. */
vruntime = max_vruntime(se->vruntime, vruntime); vruntime = max_vruntime(se->vruntime, vruntime);