From 1e5a74059f9059d330744eac84873b1b99657008 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Sun, 31 Oct 2010 12:37:04 +0100 Subject: 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 Tested-by: Marcelo Tosatti Tested-by: Sergey Senozhatsky Signed-off-by: Peter Zijlstra LKML-Reference: <1288891946.2039.31.camel@laptop> Signed-off-by: Ingo Molnar --- kernel/sched_stoptask.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'kernel/sched_stoptask.c') diff --git a/kernel/sched_stoptask.c b/kernel/sched_stoptask.c index 755483b2a2ad..2bf6b47058c1 100644 --- a/kernel/sched_stoptask.c +++ b/kernel/sched_stoptask.c @@ -19,7 +19,7 @@ select_task_rq_stop(struct rq *rq, struct task_struct *p, static void check_preempt_curr_stop(struct rq *rq, struct task_struct *p, int flags) { - resched_task(rq->curr); /* we preempt everything */ + /* we're never preempted */ } static struct task_struct *pick_next_task_stop(struct rq *rq) -- cgit v1.2.3