linux-kernel - Re: Question for remount

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Date:	Sat, 21 Feb 2009 09:45:33 +0900 (JST)
From:	"KAMEZAWA Hiroyuki" <kamezawa.hiroyu@...fujitsu.com>
To:	"Paul Menage" <menage@...gle.com>
Cc:	"KAMEZAWA Hiroyuki" <kamezawa.hiroyu@...fujitsu.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	lizf@...fujitsu.com, containers@...ts.linux-foundation.org
Subject: Re: Question for remount

Paul Menage さんは書きました：
> On Fri, Feb 20, 2009 at 2:02 AM, KAMEZAWA Hiroyuki
> <kamezawa.hiroyu@...fujitsu.com> wrote:
>>
>> 2. /proc/mounts information of release_agent should be updated....
>>   when it's overwritten directly.
>
> Yes, definitely. But shouldn't that happen already?
> cgroup_show_options() reports the current value of
> root->release_agent_path in /proc/mounts. Is it possible that mount is
> actually storing/retrieving this information in /etc/mtab, which
> doesn't get updated?
>
Ah, you're right. /proc/mounts is updated but /etc/mtab is not updated.
Hmm..from man mount(1), /etc/mtab is not synchronized with /proc/mounts.
Do we need to allow release_agent override at remount ?

-Kame

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