linux-kernel - Re: [RFC][PATCH] per-uid/gid I/O throttling (was Re: [RFC][PATCH] per-task I/O throttling)

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Message-ID: <20080111175847.GA4016@ucw.cz>
Date:	Fri, 11 Jan 2008 17:58:47 +0000
From:	Pavel Machek <pavel@....cz>
To:	Andrea Righi <righiandr@...rs.sourceforge.net>
Cc:	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Valdis.Kletnieks@...edu, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC][PATCH] per-uid/gid I/O throttling (was Re: [RFC][PATCH] per-task I/O throttling)

On Tue 2008-01-15 17:49:36, Andrea Righi wrote:
> Allow to limit the I/O bandwidth for specific uid(s) or gid(s) imposing
> additional delays on those processes that exceed the limits defined in a
> configfs tree.
> 
> Examples:
> 
> Limit the I/O bandwidth for user www-data (UID 33) to 4MB/s:
> 
> root@...ux:/config/io-throttle# mkdir uid:33
> root@...ux:/config/io-throttle# cd uid:33/
> root@...ux:/config/io-throttle/uid:33# cat io-rate
>      io-rate: 0 KiB/sec
>    requested: 0 KiB
> last_request: 0 jiffies
>        delta: 388202 jiffies
> root@...ux:/config/io-throttle/uid:33# echo 4096 > io-rate
> root@...ux:/config/io-throttle/uid:33# cat io-rate
>      io-rate: 4096 KiB/sec
>    requested: 0 KiB
> last_request: 389271 jiffies
>        delta: 91 jiffies
> 
> Limit the I/O bandwidth of group backup (GID 34) to 512KB/s:

Maybe ionice from cfq should be improved, instead?
-- 
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(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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