preempt_schedule_common() is marked notrace, but it does not use _notrace() preempt_count functions and __schedule() is also not marked notrace, which means that its perfectly possible to end up in the tracer from preempt_schedule_common(). So either we need more notrace, or we need to remove notrace from preempt_schedule_common(). Signed-off-by: Peter Zijlstra (Intel) --- kernel/sched/core.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -3044,7 +3044,7 @@ pick_next_task(struct rq *rq, struct tas * * WARNING: must be called with preemption disabled! */ -static void __sched __schedule(bool preempt) +static void __sched notrace __schedule(bool preempt) { struct task_struct *prev, *next; unsigned long *switch_count; @@ -3190,9 +3190,9 @@ void __sched schedule_preempt_disabled(v static void __sched notrace preempt_schedule_common(void) { do { - preempt_disable(); + preempt_disable_notrace(); __schedule(true); - sched_preempt_enable_no_resched(); + preempt_enable_no_resched_notrace(); /* * Check again in case we missed a preemption opportunity -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/