On 05/01/2017 05:28 PM, Ming Lei wrote: > After queue is freezed, no request in this queue can be in use > at all, so there can't be any .queue_rq() is running on this queue. > It isn't necessary to call blk_mq_quiesce_queue() any more, so > remove it in both elevator_switch_mq() and blk_mq_update_nr_requests(). Added, thanks Ming. -- Jens Axboe