linux-kernel - Re: [patch 0/4] [RFC] Another proportional weight IO controller

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Date:	Fri, 7 Nov 2008 08:38:56 -0500
From:	Vivek Goyal <vgoyal@...hat.com>
To:	Gui Jianfeng <guijianfeng@...fujitsu.com>
Cc:	linux-kernel@...r.kernel.org,
	containers@...ts.linux-foundation.org,
	virtualization@...ts.linux-foundation.org, jens.axboe@...cle.com,
	Hirokazu Takahashi <taka@...inux.co.jp>,
	Ryo Tsuruta <ryov@...inux.co.jp>,
	Andrea Righi <righi.andrea@...il.com>,
	Satoshi UCHIDA <s-uchida@...jp.nec.com>,
	fernando@....ntt.co.jp, balbir@...ux.vnet.ibm.com,
	Andrew Morton <akpm@...ux-foundation.org>, menage@...gle.com,
	ngupta@...gle.com, Rik van Riel <riel@...hat.com>,
	Jeff Moyer <jmoyer@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [patch 0/4] [RFC] Another proportional weight IO controller

On Fri, Nov 07, 2008 at 10:36:50AM +0800, Gui Jianfeng wrote:
> vgoyal@...hat.com wrote:
> > Hi,
> > 
> > If you are not already tired of so many io controller implementations, here
> > is another one.
> > 
> > This is a very eary very crude implementation to get early feedback to see
> > if this approach makes any sense or not.
> > 
> > This controller is a proportional weight IO controller primarily
> > based on/inspired by dm-ioband. One of the things I personally found little
> > odd about dm-ioband was need of a dm-ioband device for every device we want
> > to control.  I thought that probably we can make this control per request
> > queue and get rid of device mapper driver. This should make configuration
> > aspect easy.
> > 
> > I have picked up quite some amount of code from dm-ioband especially for
> > biocgroup implementation.
> > 
> > I have done very basic testing and that is running 2-3 dd commands in different
> > cgroups on x86_64. Wanted to throw out the code early to get some feedback.
> > 
> > More details about the design and how to are in documentation patch.
> > 
> > Your comments are welcome.
> 
>   Which kernel version is this patch set based on?
> 

2.6.27

Thanks
Vivek
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