Hi Bart Thanks for your kindly response. On 02/27/2018 01:12 PM, Bart Van Assche wrote: > On Tue, 2018-02-27 at 12:00 +0800, jianchao.wang wrote: >> On the other hand, this patch is to align the actions between blk-mq and block >> legacy code in __scsi_queue_insert. > > Hello Jianchao, > > Since the legacy SCSI core unpreps an reprepares a request when requeuing it I > think your patch does not align the blk-mq and legacy block layer actions but > instead makes the behavior of the two code paths different. > Can you share more details about this ? Thanks Jianchao