Commit-ID: 06c3bc655697b19521901f9254eb0bbb2c67e7e8
Gitweb: http://git.kernel.org/tip/06c3bc655697b19521901f9254eb0bbb2c67e7e8
Author: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
AuthorDate: Wed, 2 Feb 2011 13:19:48 +0100
Committer: Ingo Molnar <mingo@xxxxxxx>
CommitDate: Thu, 3 Feb 2011 12:21:33 +0100
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@xxxxxxxxxxxxx>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
LKML-Reference: <new-submission>
Cc: stable@xxxxxxxxxx # .37
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
kernel/sched_rt.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index c914ec7..ad62677 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;
--
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