linux-kernel - Re: [PATCH 3/9] bio-cgroup controller

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Message-Id: <20090417.163208.39173254.ryov@valinux.co.jp>
Date:	Fri, 17 Apr 2009 16:32:08 +0900 (JST)
From:	Ryo Tsuruta <ryov@...inux.co.jp>
To:	yoshikawa.takuya@....ntt.co.jp
Cc:	righi.andrea@...il.com, menage@...gle.com,
	balbir@...ux.vnet.ibm.com, guijianfeng@...fujitsu.com,
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Subject: Re: [PATCH 3/9] bio-cgroup controller

Hi, 

From: Takuya Yoshikawa <yoshikawa.takuya@....ntt.co.jp>
Subject: Re: [PATCH 3/9] bio-cgroup controller
Date: Fri, 17 Apr 2009 10:49:43 +0900

> > +config CGROUP_BIO
> > +	bool "Block I/O cgroup subsystem"
> > +	depends on CGROUPS && BLOCK
> > +	select MM_OWNER
> > +	help
> > +	  Provides a Resource Controller which enables to track the onwner
> > +	  of every Block I/O requests.
> > +	  The information this subsystem provides can be used from any
> > +	  kind of module such as dm-ioband device mapper modules or
> > +	  the cfq-scheduler.
>
>o I can understand this kind of information will be effective for io
>   controllers but how about cfq-scheduler? Don't we need some changes to
>   make cfq use this kind of information?

You need to modify cfq-scheduler to use bio-cgruop.

Thanks,
Ryo Tsuruta
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