linux-kernel - Re: [PATCH] Memory Resource Controller Add Boot Option

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Message-ID: <6599ad830802260058m28d8f46djc83f47e19e2946a7@mail.gmail.com>
Date:	Tue, 26 Feb 2008 00:58:06 -0800
From:	"Paul Menage" <menage@...gle.com>
To:	"Li Zefan" <lizf@...fujitsu.com>
Cc:	balbir@...ux.vnet.ibm.com,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Hugh Dickins" <hugh@...itas.com>,
	"Sudhir Kumar" <skumar@...ux.vnet.ibm.com>,
	"YAMAMOTO Takashi" <yamamoto@...inux.co.jp>,
	linux-kernel@...r.kernel.org, taka@...inux.co.jp,
	linux-mm@...ck.org, "David Rientjes" <rientjes@...gle.com>,
	"Pavel Emelianov" <xemul@...nvz.org>,
	"KAMEZAWA Hiroyuki" <kamezawa.hiroyu@...fujitsu.com>
Subject: Re: [PATCH] Memory Resource Controller Add Boot Option

On Mon, Feb 25, 2008 at 7:01 PM, Li Zefan <lizf@...fujitsu.com> wrote:
>  >
>  > - foo doesn't show up in /proc/cgroups
>
>  Or we can print out the disable flag, maybe this will be better?
>  Because we can distinguish from disabled and not compiled in from
>
> /proc/cgroups.

Certainly possible, if people felt it was useful.

>
>  > - foo isn't auto-mounted if you mount all cgroups in a single hierarchy
>  > - foo isn't visible as an individually mountable subsystem
>
>  You mentioned in a previous mail if we mount a disabled subsystem we
>  will get an error. Here we just ignore the mount option. Which makes
>  more sense ?
>

No, we don't ignore the mount option - we give an error since it
doesn't refer to a valid subsystem. (And in the first case there is no
mount option).

Paul
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