On Mon, Mar 05 2018 at 2:23am -0500,
Kashyap Desai <kashyap.de...@broadcom.com> wrote:
> > -----Original Message-----
> > From: Laurence Oberman [mailto:lober...@redhat.com]
> > Sent: Saturday, March 3, 2018 3:23 AM
> > To: Don Brace; Ming Lei
> > Cc: Jens Axboe; email@example.com; Christoph Hellwig; Mike
> > Snitzer;
> > linux-s...@vger.kernel.org; Hannes Reinecke; Arun Easi; Omar Sandoval;
> > Martin K . Petersen; James Bottomley; Christoph Hellwig; Kashyap Desai;
> > Peter
> > Rivera; Meelis Roos
> > Subject: Re: [PATCH V3 1/8] scsi: hpsa: fix selection of reply queue
> > Unless Kashyap is not happy we need to consider getting this in to Linus
> > now
> > because we are seeing HPE servers that keep hanging now with the original
> > commit now upstream.
> > Kashyap, are you good with the v3 patchset or still concerned with
> > performance. I was getting pretty good IOPS/sec to individual SSD drives
> > set
> > up as jbod devices on the megaraid_sas.
> Laurence -
> Did you find difference with/without the patch ? What was IOPs number with
> and without patch.
> It is not urgent feature, so I would like to take some time to get BRCM's
> performance team involved and do full analysis of performance run and find
Performance doesn't matter if the system cannot even boot (e.g. HPE
servers with hpsa using the latest linus tree).
Have you tried your testbed with just applying the first 2 patches? Or
do those cause the performance hit and the follow-on patches in the
series attempt to recover from it?