[dm-devel] [PATCH v4 6/6] dm rq: Avoid that request processing stalls sporadically

[Bart Van Assche]

On Tue, 2017-04-11 at 13:47 -0400, Mike Snitzer wrote:
> Other drivers will very likely be caught about by
> this blk-mq quirk in the future.

Hello Mike,

Are you aware that the requirement that blk-mq drivers rerun the queue after
having returned BLK_MQ_RQ_QUEUE_BUSY is a requirement that is shared with
traditional block drivers? From dm_old_request_fn():

	if (... || (ti->type->busy && ti->type->busy(ti))) {
		blk_delay_queue(q, 10);
		return;
	}

Bart.