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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2011-02-02 13:19:48 +0100
committerIngo Molnar <mingo@elte.hu>2011-02-03 12:21:33 +0100
commit06c3bc655697b19521901f9254eb0bbb2c67e7e8 (patch)
treef712a3359f9a3a73652bb3316e0281f26f48c1ab /kernel/sched_rt.c
parent1e1dbb259c79b38a542c1c4c00fd8dfe936b183b (diff)
downloadlwn-06c3bc655697b19521901f9254eb0bbb2c67e7e8.tar.gz
lwn-06c3bc655697b19521901f9254eb0bbb2c67e7e8.zip
sched: Fix update_curr_rt()
cpu_stopper_thread() migration_cpu_stop() __migrate_task() deactivate_task() dequeue_task() dequeue_task_rq() update_curr_rt() Will call update_curr_rt() on rq->curr, which at that time is rq->stop. The problem is that rq->stop.prio matches an RT prio and thus falsely assumes its a rt_sched_class task. Reported-Debuged-Tested-Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <new-submission> Cc: stable@kernel.org # .37 Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched_rt.c')
-rw-r--r--kernel/sched_rt.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index c914ec747ca6..ad6267714c84 100644
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -625,7 +625,7 @@ static void update_curr_rt(struct rq *rq)
struct rt_rq *rt_rq = rt_rq_of_se(rt_se);
u64 delta_exec;
- if (!task_has_rt_policy(curr))
+ if (curr->sched_class != &rt_sched_class)
return;
delta_exec = rq->clock_task - curr->se.exec_start;