On Tue, Oct 28, 2014 at 09:20:55PM +0100, Christian Borntraeger wrote: > I have not verified this, but I guess what happens is: > hotplug > -> notify > -> blk_mq_queue_reinit_notify > -> blk_mq_queue_reinit > -> blk_mq_freeze_queue > -> percpu_ref_kill > -> percpu_ref_kill_and_confirm > -> __percpu_ref_switch_to_atomic > -> call_rcu_sched But call_rcu_sched() wouldn't show up as latency. It's an async call unlike synchronize_*(). Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
