Re: Fwd: [PATCH 0/5] cfq-iosched: improve latency for no-idlequeues (v3)

From: Jens Axboe
Date: Wed Nov 04 2009 - 02:51:58 EST

On Tue, Nov 03 2009, Jeff Moyer wrote:
> Jens Axboe <jens.axboe@xxxxxxxxxx> writes:
> > On Tue, Nov 03 2009, Jeff Moyer wrote:
> >> Jens Axboe <jens.axboe@xxxxxxxxxx> writes:
> >>
> >> > Since for-linus contains conflicting changes, can you and Jeff please
> >> > double check that everything is still in order? The interesting bit here
> >> > is the merge with for-2.6.33 and the coop limit from Shaohua Li. I did
> >> > the straight forward merge, but we likely just need to drop that logic
> >> > since the coop concept is radically different given that we merge and
> >> > break queues in for-2.6.33.
> >>
> >> Yeah, since I changed the meaning of the cfqq_coop flag, a lot of those
> >> tests are just plain wrong. Let me play with it and I'll send you an
> >> incremental patch in a bit.
> >
> > Thanks, here's what I have. It's basically a revert of the commit in
> > question.
> Your patch looks like a straight-forward revert. I still think we need
> some guards in place, though. For now, I think we can go with what you
> have, and I'll come up with some other mechanism to deal with this case.

Thanks Jeff, I'll merge it up and we can get things straightened out in
due time.

Jens Axboe

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