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

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Message-ID: <20090514164349.GA22833@linux.vnet.ibm.com>
Date:	Thu, 14 May 2009 22:13:49 +0530
From:	Dhaval Giani <dhaval@...ux.vnet.ibm.com>
To:	Vivek Goyal <vgoyal@...hat.com>
Cc:	Andrea Righi <righi.andrea@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>, nauman@...gle.com,
	dpshah@...gle.com, lizf@...fujitsu.com, mikew@...gle.com,
	fchecconi@...il.com, paolo.valente@...more.it,
	jens.axboe@...cle.com, ryov@...inux.co.jp, fernando@....ntt.co.jp,
	s-uchida@...jp.nec.com, taka@...inux.co.jp,
	guijianfeng@...fujitsu.com, jmoyer@...hat.com,
	balbir@...ux.vnet.ibm.com, linux-kernel@...r.kernel.org,
	containers@...ts.linux-foundation.org, agk@...hat.com,
	dm-devel@...hat.com, snitzer@...hat.com, m-ikeda@...jp.nec.com,
	peterz@...radead.org, Bharata B Rao <bharata@...ux.vnet.ibm.com>
Subject: Re: IO scheduler based IO Controller V2

On Fri, May 08, 2009 at 05:56:18PM -0400, Vivek Goyal wrote:

>   So, we shall have to come up with something better, I think Dhaval was
>   implementing upper limit for cpu controller. May be PeterZ and Dhaval can
>   give us some pointers how did they manage to implement both proportional
>   and max bw control with the help of a single tree while maintaining the
>   notion of prio with-in cgroup.
> 
> PeterZ/Dhaval  ^^^^^^^^
> 

We still haven't :). I think the idea is to keep fairness (or
propotion) between the groups that are currently running. The throttled
groups should not be considered.

thanks,
-- 
regards,
Dhaval
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