linux-kernel - Re: IO scheduler based IO Controller V2

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Message-ID: <20090506132822.GA8180@redhat.com>
Date:	Wed, 6 May 2009 09:28:22 -0400
From:	Vivek Goyal <vgoyal@...hat.com>
To:	Balbir Singh <balbir@...ux.vnet.ibm.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	dhaval@...ux.vnet.ibm.com, snitzer@...hat.com, dm-devel@...hat.com,
	jens.axboe@...cle.com, agk@...hat.com, paolo.valente@...more.it,
	fernando@....ntt.co.jp, jmoyer@...hat.com, fchecconi@...il.com,
	containers@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org, righi.andrea@...il.com
Subject: Re: IO scheduler based IO Controller V2

On Wed, May 06, 2009 at 09:11:18AM +0530, Balbir Singh wrote:
> * Andrew Morton <akpm@...ux-foundation.org> [2009-05-05 13:24:41]:
> 
> > On Tue,  5 May 2009 15:58:27 -0400
> > Vivek Goyal <vgoyal@...hat.com> wrote:
> > 
> > > 
> > > Hi All,
> > > 
> > > Here is the V2 of the IO controller patches generated on top of 2.6.30-rc4.
> > > ...
> > > Currently primarily two other IO controller proposals are out there.
> > > 
> > > dm-ioband
> > > ---------
> > > This patch set is from Ryo Tsuruta from valinux.
> > > ...
> > > IO-throttling
> > > -------------
> > > This patch set is from Andrea Righi provides max bandwidth controller.
> > 
> > I'm thinking we need to lock you guys in a room and come back in 15 minutes.
> > 
> > Seriously, how are we to resolve this?  We could lock me in a room and
> > cmoe back in 15 days, but there's no reason to believe that I'd emerge
> > with the best answer.
> >
> 
> We are planning an IO mini-summit prior to the kernel summit
> (hopefully we'll all be able to attend and decide).

Hi Balbir,

Mini summit is still few months away. I think a better idea would be to
try to thrash out the details here on lkml and try to reach to some
conclusion.

Its a complicated problem and there are no simple and easy answers. If we
can't reach a conclusion here, I am skeptical that mini summit will serve
that purpose.

Thanks
Vivek
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