On Thu, 2017-02-02 at 16:10 -0500, Mike Snitzer wrote: > Care to try moving the dm_get(md) at the end of dm_start_request() to > the beginning of dm_start_request() and report back on whether it helps > at all? Hello Mike, Sorry but I don't see how that could make a difference. While we are at it: since dm_start_request() calls dm_get() and since rq_completed() calls dm_put(), calls to these two functions should always be paired. There is only one dm_start_request() call in the dm-mq code, namely the one in dm_mq_queue_rq(). However, if map_request() returns DM_MAPIO_REQUEUE then rq_completed() is called twice: a first time by dm_requeue_original_request() and a second time by the dm_mq_queue_rq(). Do you agree with this? Thanks, Bart.-- To unsubscribe from this list: send the line "unsubscribe linux-block" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
