linux-kernel - Re: zero devno in /proc/self/mountinfo

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Message-ID: <20120229143725.GA18232@x2.net.home>
Date:	Wed, 29 Feb 2012 15:37:25 +0100
From:	Karel Zak <kzak@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	Zhi Li <xiaoxiang.fu@....com>
Subject: Re: zero devno in /proc/self/mountinfo

On Wed, Feb 29, 2012 at 03:14:33PM +0100, Karel Zak wrote:
> On Wed, Feb 29, 2012 at 04:28:49PM +0800, Zhi Li wrote:
> > zhi@...ian-lizhi:~$ cat /proc/self/mountinfo
> > 14 19 0:0 / /sys rw,nosuid,nodev,noexec,relatime - sysfs none rw
> 
>  Strange, I have never seen zero (0:0) devno. Is it correct? Seems
>  like a bug.

 OK, fs/super.c, get_anon_bdev(), unnamed_dev_start = 0; explains the
 problem. It seems like expected behavior.

    Karel

-- 
 Karel Zak  <kzak@...hat.com>
 http://karelzak.blogspot.com
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