| Date | Tue, 29 Sep 2015 12:27:55 +0200 | From | Peter Zijlstra <> | Subject | [RFC][PATCH 12/11] sched: Add preempt_count invariant check |
| |
Ingo requested I keep my debug check for the preempt_count invariant.
Requested-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> --- kernel/sched/core.c | 5 +++++ 1 file changed, 5 insertions(+)
--- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -2503,6 +2503,11 @@ static struct rq *finish_task_switch(str struct mm_struct *mm = rq->prev_mm; long prev_state; + if (unlikely(WARN_ONCE(preempt_count() != 2, + "corrupted preempt_count: %s/%d/0x%x\n", + current->comm, current->pid, preempt_count()))) + preempt_count_set(INIT_PREEMPT_COUNT); + rq->prev_mm = NULL; /*
|