On Thu, 2017-04-06 at 03:38 +0000, Long Li wrote: > > -----Original Message----- > > From: Bart Van Assche [mailto:Bart.VanAssche@xxxxxxxxxxx] > > > > Please drop this patch. I'm working on a better solution. > > Thank you. Looking forward to your patch. Hello Long, It would help if you could share the name of the block or SCSI driver with which you ran into that lockup and also if you could share the name of the I/O scheduler used in your test. Thanks, Bart.