Subject: Re: [patch 0/4] [RFC] Another proportional weight IO controller
From: Peter Zijlstra <peterz@infradead.org>
To: vgoyal@redhat.com
Cc: linux-kernel@vger.kernel.org, containers@lists.linux-foundation.org,
       virtualization@lists.linux-foundation.org, jens.axboe@oracle.com,
       Hirokazu Takahashi <taka@valinux.co.jp>,
       Ryo Tsuruta <ryov@valinux.co.jp>, Andrea Righi <righi.andrea@gmail.com>,
       Satoshi UCHIDA <s-uchida@ap.jp.nec.com>, fernando@oss.ntt.co.jp,
       balbir@linux.vnet.ibm.com, Andrew Morton <akpm@linux-foundation.org>,
       menage@google.com, ngupta@google.com, Rik van Riel <riel@redhat.com>,
       Jeff Moyer <jmoyer@redhat.com>
In-Reply-To: <20081106153022.215696930@redhat.com>
References: <20081106153022.215696930@redhat.com>
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Date: Thu, 06 Nov 2008 16:49:53 +0100
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On Thu, 2008-11-06 at 10:30 -0500, vgoyal@redhat.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.

please include

QUILT_REFRESH_ARGS="--diffstat --strip-trailing-whitespace"

in your environment or .quiltrc

I would expect all those bio* files to be placed in block/ not mm/

Does this still require I use dm, or does it also work on regular block
devices? Patch 4/4 isn't quite clear on this.
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