Ingo requested I keep my debug check for the preempt_count invariant.
Requested-by: Ingo Molnar <mi...@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org>
---
kernel/sched/core.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -2514,6 +2514,10 @@ static struct rq *finish_task_switch(str
*
* Also, see FORK_PREEMPT_COUNT.
*/
+ if (unlikely(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;
--
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