linux-kernel - Re: Fwd: [PATCH 0/5] cfq-iosched: improve latency for no-idle queues (v3)

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Message-ID: <20091104075152.GX8742@kernel.dk>
Date:	Wed, 4 Nov 2009 08:51:52 +0100
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Jeff Moyer <jmoyer@...hat.com>
Cc:	Corrado Zoccolo <czoccolo@...il.com>,
	Linux-Kernel <linux-kernel@...r.kernel.org>
Subject: Re: Fwd: [PATCH 0/5] cfq-iosched: improve latency for no-idle
	queues (v3)

On Tue, Nov 03 2009, Jeff Moyer wrote:
> Jens Axboe <jens.axboe@...cle.com> writes:
> 
> > On Tue, Nov 03 2009, Jeff Moyer wrote:
> >> Jens Axboe <jens.axboe@...cle.com> 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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