linux-kernel - [overlayfs/bug] LXC ephemeral containers have "/rootfs" prefix in /proc/self/maps entries

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Message-ID: <CAK5ve-LaEXC56iYAc+hCFen2x9Lfscy6Q-z1cCE21UypqpaK3g@mail.gmail.com>
Date:	Thu, 2 Aug 2012 21:14:46 +0800
From:	Bryan Wu <bryan.wu@...onical.com>
To:	Miklos Szeredi <miklos@...redi.hu>
Cc:	linux-fsdevel@...r.kernel.org, lkml <linux-kernel@...r.kernel.org>,
	kernel-team@...ts.ubuntu.com
Subject: [overlayfs/bug] LXC ephemeral containers have "/rootfs" prefix in
 /proc/self/maps entries

Miklos,

We met a LXC issue [1] with overlayfs in Ubuntu, but with aufs it is gone.

I suspect it's related to the issue you mentioned in Documentation of overlayfs:
--
Symlinks in /proc/PID/ and /proc/PID/fd which point to a non-directory
object in overlayfs will not contain vaid absolute paths, only
relative paths leading up to the filesystem's root.  This will be
fixed in the future.
--

Could you please help to take a look at this? or point me out some hints.

[1], https://bugs.launchpad.net/ubuntu/+source/linux/+bug/959352

Thanks,
-- 
Bryan Wu <bryan.wu@...onical.com>
Kernel Developer    +86.186-168-78255 Mobile
Canonical Ltd.      www.canonical.com
Ubuntu - Linux for human beings | www.ubuntu.com
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