linux-kernel - Re: [PATCH 18/23] io-controller: blkio_cgroup patches from Ryo to track async bios.

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Message-ID: <4A9C09BE.4060404@redhat.com>
Date:	Mon, 31 Aug 2009 13:34:54 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Vivek Goyal <vgoyal@...hat.com>
CC:	linux-kernel@...r.kernel.org, jens.axboe@...cle.com,
	containers@...ts.linux-foundation.org, dm-devel@...hat.com,
	nauman@...gle.com, dpshah@...gle.com, lizf@...fujitsu.com,
	mikew@...gle.com, fchecconi@...il.com, paolo.valente@...more.it,
	ryov@...inux.co.jp, fernando@....ntt.co.jp, s-uchida@...jp.nec.com,
	taka@...inux.co.jp, guijianfeng@...fujitsu.com, jmoyer@...hat.com,
	dhaval@...ux.vnet.ibm.com, balbir@...ux.vnet.ibm.com,
	righi.andrea@...il.com, m-ikeda@...jp.nec.com, agk@...hat.com,
	akpm@...ux-foundation.org, peterz@...radead.org,
	jmarchan@...hat.com, torvalds@...ux-foundation.org, mingo@...e.hu
Subject: Re: [PATCH 18/23] io-controller: blkio_cgroup patches from Ryo to
 track async bios.

Vivek Goyal wrote:
> o blkio_cgroup patches from Ryo to track async bios.
> 
> o This functionality is used to determine the group of async IO from page
>   instead of context of submitting task.
> 
> Signed-off-by: Hirokazu Takahashi <taka@...inux.co.jp>
> Signed-off-by: Ryo Tsuruta <ryov@...inux.co.jp>
> Signed-off-by: Vivek Goyal <vgoyal@...hat.com>

This seems to be the most complex part of the code so far,
but I see why this code is necessary.

Acked-by: Rik van Riel <riel@...hat.com>

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