linux-kernel - Re: [RFC][PATCH] per-task I/O throttling

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Date:	Fri, 11 Jan 2008 21:29:07 +0530
From:	"Balbir Singh" <balbir@...ux.vnet.ibm.com>
To:	righiandr@...rs.sourceforge.net
Cc:	LKML <linux-kernel@...r.kernel.org>,
	"Jens Axboe" <jens.axboe@...cle.com>
Subject: Re: [RFC][PATCH] per-task I/O throttling

On Jan 11, 2008 4:15 AM, Andrea Righi <righiandr@...rs.sourceforge.net> wrote:
> Allow to limit the bandwidth of I/O-intensive processes, like backup
> tools running in background, large files copy, checksums on huge files,
> etc.
>
> This kind of processes can noticeably impact the system responsiveness
> for some time and playing with tasks' priority is not always an
> acceptable solution.
>
> This patch allows to specify a maximum I/O rate in sectors per second
> for each single process via /proc/<PID>/io_throttle (default is zero,
> that specify no limit).
>
> Signed-off-by: Andrea Righi <a.righi@...eca.it>

Hi, Andrea,

We have been thinking of doing control group based I/O control. I have
not reviewed your patch in detail. I can suggest looking at openvz's
IO controller. I/O bandwidth control is definitely interesting. How
did you test your solution?

Balbir
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