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To: Valerie Aurora <vaurora@redhat.com>
CC: viro@zeniv.linux.org.uk, miklos@szeredi.hu, jblunck@suse.de,
        hch@infradead.org, linux-kernel@vger.kernel.org,
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In-reply-to: <1276627208-17242-22-git-send-email-vaurora@redhat.com> (message
	from Valerie Aurora on Tue, 15 Jun 2010 11:39:51 -0700)
Subject: Re: [PATCH 21/38] union-mount: Support for mounting union mount file systems
References: <1276627208-17242-1-git-send-email-vaurora@redhat.com> <1276627208-17242-22-git-send-email-vaurora@redhat.com>
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From: Miklos Szeredi <miklos@szeredi.hu>
Date: Wed, 04 Aug 2010 16:55:39 +0200
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On Tue, 15 Jun 2010, Valerie Aurora wrote:
> Create and tear down union mount structures on mount.  Check
> requirements for union mounts.  This version clones the read-only
> mounts and puts them in an array hanging off the superblock of the
> topmost layer.

If I do

  mount -r fs1 /mnt
  mount -r fs2 /mnt
  mount -ounion fs3 /mnt

then only fs2 and fs3 will be unioned.

Or how are multiple read-only layers supposed to work?

Miklos