Commit e2bf1c4b authored Sep 29, 2015 by Peter Zijlstra Committed by Ingo Molnar Oct 06, 2015

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>

parent 499d7955

kernel/sched/core.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -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;