Re: [PATCH V2 00/20] blk-mq-sched: improve SCSI-MQ performance

Ming Lei
2017-08-23T16:24:12Z

On Wed, Aug 23, 2017 at 10:15:29AM -0600, Jens Axboe wrote:
> On 08/23/2017 10:12 AM, Bart Van Assche wrote:
> > On Sat, 2017-08-05 at 14:56 +0800, Ming Lei wrote:
> >> In Red Hat internal storage test wrt. blk-mq scheduler, we
> >> found that I/O performance is much bad with mq-deadline, especially
> >> about sequential I/O on some multi-queue SCSI devcies(lpfc, qla2xxx,
> >> SRP...)
> >
> > Hello Ming and Jens,
> >
> > There may not be enough time left to reach agreement about the whole patch
> > series before the kernel v4.14 merge window opens. How about focusing on
> > patches 1..8 of this series for kernel v4.14 and revisiting the rest of this
> > patch series later?
>
> I was going to go over the series today with 4.14 in mind. Looks to me like
> this should really be 2-3 patch series, that depend on each other. Might be
> better for review purposes as well. So I'd agree with Bart - can we get this
> split a bit and geared towards what we need for 4.14 at least, since it's
> getting close. And some of the changes do make me somewhat nervous, they
> need proper cooking time.

I agree to split the patchset, will do it tomorrow.
If you guys have any suggestions about the splitting(such as
which should aim at v4.14), please let me know.

--
Ming