diff options
| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2010-10-31 12:37:04 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-11-11 14:37:23 +0100 |
| commit | 1e5a74059f9059d330744eac84873b1b99657008 (patch) | |
| tree | f32f8ac76d5a6c49c1b4cd8f83155af00007fac0 /kernel/sched_fair.c | |
| parent | 2d46709082c062cae7cce1a15f8cd4cd81b92d88 (diff) | |
| download | blackbird-obmc-linux-1e5a74059f9059d330744eac84873b1b99657008.tar.gz blackbird-obmc-linux-1e5a74059f9059d330744eac84873b1b99657008.zip | |
sched: Fix cross-sched-class wakeup preemption
Instead of dealing with sched classes inside each check_preempt_curr()
implementation, pull out this logic into the generic wakeup preemption
path.
This fixes a hang in KVM (and others) where we are waiting for the
stop machine thread to run ...
Reported-by: Markus Trippelsdorf <markus@trippelsdorf.de>
Tested-by: Marcelo Tosatti <mtosatti@redhat.com>
Tested-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1288891946.2039.31.camel@laptop>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched_fair.c')
| -rw-r--r-- | kernel/sched_fair.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index 034c4f410b36..52ab113d8bb9 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -1654,12 +1654,6 @@ static void check_preempt_wakeup(struct rq *rq, struct task_struct *p, int wake_ struct cfs_rq *cfs_rq = task_cfs_rq(curr); int scale = cfs_rq->nr_running >= sched_nr_latency; - if (unlikely(rt_prio(p->prio))) - goto preempt; - - if (unlikely(p->sched_class != &fair_sched_class)) - return; - if (unlikely(se == pse)) return; |
