From: Neil Brown <neilb@suse.de>
To: linux-kernel@vger.kernel.org
Date: Wed, 23 Nov 2005 13:07:28 +1100
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Message-ID: <17283.52960.913712.454816@cse.unsw.edu.au>
Cc: Al Viro <viro@ftp.linux.org.uk>
Subject: pivot_root broken in 2.6.15-rc1-mm2
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 788
Lines: 29


Pivot_root seems to be broken in 2.6.15-rc1-mm2.

I havea initramfs filesystem, mount a ext3 filesystem (which has /mnt)
at '/root' and

  cd /root
  pivot . mnt

and it says -EINVAL.

After putting in copious tracing printk, the offending test is:

	if (user_nd.mnt->mnt_parent == user_nd.mnt)
		goto out2; /* not attached */

If I remove this, it works (or seems to).
Presumably the initial root file system is 'not attached'.  But that
shouldn't be a problem, should it?

Could this be related to the new shared mounts stuff???

NeilBrown
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/