linux-kernel - Re: IO scheduler based IO controller V10

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Message-ID: <20091002153117.GB4494@redhat.com>
Date:	Fri, 2 Oct 2009 11:31:17 -0400
From:	Vivek Goyal <vgoyal@...hat.com>
To:	Corrado Zoccolo <czoccolo@...il.com>
Cc:	Mike Galbraith <efault@....de>, Jens Axboe <jens.axboe@...cle.com>,
	Ingo Molnar <mingo@...e.hu>,
	Ulrich Lukas <stellplatz-nr.13a@...enparkplatz.de>,
	linux-kernel@...r.kernel.org,
	containers@...ts.linux-foundation.org, dm-devel@...hat.com,
	nauman@...gle.com, dpshah@...gle.com, lizf@...fujitsu.com,
	mikew@...gle.com, fchecconi@...il.com, paolo.valente@...more.it,
	ryov@...inux.co.jp, fernando@....ntt.co.jp, jmoyer@...hat.com,
	dhaval@...ux.vnet.ibm.com, balbir@...ux.vnet.ibm.com,
	righi.andrea@...il.com, m-ikeda@...jp.nec.com, agk@...hat.com,
	akpm@...ux-foundation.org, peterz@...radead.org,
	jmarchan@...hat.com, torvalds@...ux-foundation.org, riel@...hat.com
Subject: Re: IO scheduler based IO controller V10

On Fri, Oct 02, 2009 at 05:27:55PM +0200, Corrado Zoccolo wrote:
> On Fri, Oct 2, 2009 at 2:49 PM, Vivek Goyal <vgoyal@...hat.com> wrote:
> > On Fri, Oct 02, 2009 at 12:55:25PM +0200, Corrado Zoccolo wrote:
> >
> > Actually I am not touching this code. Looking at the V10, I have not
> > changed anything here in idling code.
> 
> I based my analisys on the original patch:
> http://lkml.indiana.edu/hypermail/linux/kernel/0907.1/01793.html
> 

Oh.., you are talking about fairness for seeky process patch. I thought
you are talking about current IO controller patches. Actually they both
have this notion of "fairness=1" parameter but do different things in 
patches, hence the confusion. 

Thanks
Vivek


> Mike, can you confirm which version of the fairness patch did you use
> in your tests?
> 
> Corrado
> 
> > Thanks
> > Vivek
> >
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