From e62dd02ed0af35631c6ca473e50758c9594773cf Mon Sep 17 00:00:00 2001 From: Dmitry Adamushko Date: Mon, 15 Oct 2007 17:00:14 +0200 Subject: [PATCH] sched: fix group scheduling for SCHED_BATCH The following patch (sched: disable sleeper_fairness on SCHED_BATCH) seems to break GROUP_SCHED. Although, it may be 'oops'-less due to the possibility of 'p' being always a valid address. Signed-off-by: Dmitry Adamushko Signed-off-by: Ingo Molnar --- kernel/sched_fair.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index 410b77a..3ac096e 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -485,9 +485,8 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial) vruntime += sched_vslice_add(cfs_rq, se); if (!initial) { - struct task_struct *p = container_of(se, struct task_struct, se); - - if (sched_feat(NEW_FAIR_SLEEPERS) && p->policy != SCHED_BATCH) + if (sched_feat(NEW_FAIR_SLEEPERS) && entity_is_task(se) && + task_of(se)->policy != SCHED_BATCH) vruntime -= sysctl_sched_latency; vruntime = max_t(s64, vruntime, se->vruntime); -- 2.7.4