On Tue, Oct 31, 2017 at 02:29:32PM -0600, Jens Axboe wrote: > On 10/26/2017 10:43 PM, Ming Lei wrote: > > Hi Jens, > > > > The 1st patch removes the RESTART for TAG-SHARED because SCSI handles it > > by itself, and not necessary to waste CPU to do the expensive RESTART. > > And Roman Pen reported that this RESTART cuts half of IOPS in his case. > > > > The 2nd patch removes the RESTART when .get_budget returns BLK_STS_RESOURCE, > > and this RESTART is handled by SCSI's RESTART(scsi_end_request()) too. > > What base is this against? The for-next branch of your block tree: -- Ming
