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| author | Peter Zijlstra <peterz@infradead.org> | 2015-09-29 12:18:46 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-10-06 17:08:20 +0200 |
| commit | e2bf1c4b17aff25f07e0d2952d8c1c66643f33fe (patch) | |
| tree | 0fb449a9ea119b59e74d20608c1e0be1a5dd707b /kernel/sched | |
| parent | 499d79559ffe4b9c0c3031752f6a40abd532fb75 (diff) | |
| download | linux-e2bf1c4b17aff25f07e0d2952d8c1c66643f33fe.tar.bz2 | |
sched/core: 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>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/core.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 98c4cf8182cf..4554cde2f6f9 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -2514,6 +2514,10 @@ static struct rq *finish_task_switch(struct task_struct *prev) * * Also, see FORK_PREEMPT_COUNT. */ + if (WARN_ONCE(preempt_count() != 2*PREEMPT_DISABLE_OFFSET, + "corrupted preempt_count: %s/%d/0x%x\n", + current->comm, current->pid, preempt_count())) + preempt_count_set(FORK_PREEMPT_COUNT); rq->prev_mm = NULL; |