linux-kernel - Re: [PATCH 0/3] cgroup: block device i/o bandwidth controller (v2)

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Message-ID: <484E0DB4.4070508@linux.vnet.ibm.com>
Date:	Tue, 10 Jun 2008 10:44:28 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	Andrea Righi <righi.andrea@...il.com>
CC:	menage@...gle.com, matt@...ehost.com, roberto@...it.it,
	randy.dunlap@...cle.com, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/3] cgroup: block device i/o bandwidth controller (v2)

Andrea Righi wrote:
> The goal of the i/o bandwidth controller is to improve i/o performance
> predictability and provide better QoS for different cgroups sharing the same
> block devices.
> 
> Respect to other priority/weight-based solutions the approach used by this
> controller is to explicitly choke applications' requests that directly (or
> indirectly) generate i/o activity in the system.
> 
> The direct bandwidth limiting method has the advantage of improving the
> performance predictability at the cost of reducing, in general, the overall
> performance of the system (in terms of throughput).
> 
> Detailed informations about design, its goal and usage are described in the
> documentation.
> 

I'll read through the documentation and comment.

> Tested against latest git (2.6.26-rc5).
> 
> The all-in-one patch can be found at:
> http://download.systemimager.org/~arighi/linux/patches/io-throttle/
> 

Cool! thanks for doing this, it's useful.

> Previous version and test report can be found here:
> http://lkml.org/lkml/2008/5/24/97


-- 
	Warm Regards,
	Balbir Singh
	Linux Technology Center
	IBM, ISTL
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