linux-kernel - Re: [PATCH 15/23] io-controller: noop changes for hierarchical fair queuing

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Message-ID: <4A9B3B0B.9090009@redhat.com>
Date:	Sun, 30 Aug 2009 22:52:59 -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 15/23] io-controller: noop changes for hierarchical fair
 queuing

Vivek Goyal wrote:
> This patch changes noop to use queue scheduling code from elevator layer.
> One can go back to old noop by deselecting CONFIG_IOSCHED_NOOP_HIER.
> 
> Signed-off-by: Nauman Rafique <nauman@...gle.com>
> Signed-off-by: Vivek Goyal <vgoyal@...hat.com>

Not sure why noop needs hierarchical fair queueing
support, but this patch is so small we might as well
take it to keep things consistent between schedulers.

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

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