From e22ecef1d2658ba54ed7d3fdb5d60829fb434c23 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Fri, 14 Mar 2008 22:16:08 +0100 Subject: [PATCH] sched: fix fair sleepers Fair sleepers need to scale their latency target down by runqueue weight. Otherwise busy systems will gain ever larger sleep bonus. Signed-off-by: Ingo Molnar Signed-off-by: Peter Zijlstra --- kernel/sched_fair.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index 31c4a2988b6..31aa1b9fa76 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -528,8 +528,10 @@ 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)) - vruntime -= sysctl_sched_latency; + if (sched_feat(NEW_FAIR_SLEEPERS)) { + vruntime -= calc_delta_fair(sysctl_sched_latency, + &cfs_rq->load); + } /* ensure we never gain time by being placed backwards. */ vruntime = max_vruntime(se->vruntime, vruntime); -- 2.41.1