> -----Original Message----- > From: Greg Kroah-Hartman [mailto:gre...@linuxfoundation.org] > Sent: Friday, March 10, 2017 7:22 AM > To: Ben Hutchings <b...@decadent.org.uk> > Cc: linux-kernel@vger.kernel.org; sta...@vger.kernel.org; Long Li > <lon...@microsoft.com>; KY Srinivasan <k...@microsoft.com>; Martin K. > Petersen <martin.peter...@oracle.com> > Subject: Re: [PATCH 4.4 34/91] scsi: storvsc: use tagged SRB requests if > supported by the device > > On Fri, Mar 10, 2017 at 02:56:59PM +0000, Ben Hutchings wrote: > > On Fri, 2017-03-10 at 10:08 +0100, Greg Kroah-Hartman wrote: > > > 4.4-stable review patch. If anyone has any objections, please let me > know. > > > > > > ------------------ > > > > > > From: Long Li <lon...@microsoft.com> > > > > > > commit 3cd6d3d9b1abab8dcdf0800224ce26daac24eea2 upstream. > > > > > > Properly set SRB flags when hosting device supports tagged queuing. > > > This patch improves the performance on Fiber Channel disks. > > [...] > > > > This looks more like a feature/optimisation than a bug fix. Is this > > really within the stable rules? > > Making things work properly (i.e. i/o does not suck anymore), is ok for > stable stuff. KY, that's the case here, right?
If I recall correctly, this was needed for Fibre Channel SANs where without this fix the performance was so bad to be almost unusable. K. Y > > thanks, > > greg k-h
