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    SubjectRe: [PATCH 21/38] union-mount: Support for mounting union mount file systems
    On Wed, Aug 04, 2010 at 04:55:39PM +0200, Miklos Szeredi wrote:
    > 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?

    You have it right, this is a bug in lookup in the last version I sent
    out. I had commented out the part of my test suite that actually
    tested three layer mounts so I didn't notice when I broke it. :/ I'll
    post a new version with the fix today.


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