linux-kernel - Re: Question for remount

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Message-ID: <49A20976.2050301@cn.fujitsu.com>
Date:	Mon, 23 Feb 2009 10:27:02 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	menage@...gle.com, containers@...ts.linux-foundation.org
Subject: Re: Question for remount

> 1. Documentation/cgroups/cgroup.txt says
>    #mount -oremount,cpuset,ns /dev/cgroup
>    But this should be
>    #mount -tcgroup none /dev/cgroup -oremount,cpuset,ns
> 

I agree. Actually I noticed this long ago.

Doing this won't remove cpuacct from the cgroup hierarchy:
# mount -t cgroup -o cpu,cpuacct xxx /mnt
# mount -o remount,cpu /mnt
This will get you right:
# mount [-t cgroup] -o remount,cpu xxx /mnt

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