On 03/30/2017 11:53 AM, Jens Axboe wrote: > This adds a new module parameter to null_blk, blocking. If set, null_blk > will set the BLK_MQ_F_BLOCKING flag, indicating that it sometimes/always > needs to block in its ->queue_rq() function. The intent is to help find > regressions in blocking drivers, since not many of them exist. > > If null_blk is loaded with submit_queues > 1 and blocking=1, this > shows the regression recently fixed by bf4907c05e61. Reviewed-by: Bart Van Assche <bart.vanassche@xxxxxxxxxxx>
