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    SubjectRe: [RFC] shared subtrees
    On Sun, Jan 16, 2005 at 01:42:09PM -0500, J. Bruce Fields wrote:
    > On Sun, Jan 16, 2005 at 06:06:56PM +0000, Al Viro wrote:
    > > On Sun, Jan 16, 2005 at 11:02:13AM -0500, J. Bruce Fields wrote:
    > > > On Thu, Jan 13, 2005 at 10:18:51PM +0000, Al Viro wrote:
    > > > > 6. mount --move
    > > > > prohibited if what we are moving is in some p-node, otherwise we move
    > > > > as usual to intended mountpoint and create copies for everything that
    > > > > gets propagation from there (as we would do for rbind).
    > > >
    > > > Why this prohibition?
    > >
    > > How do you propagate that? We can weaken that to "in a p-node that
    > > owns something or contains more than one vfsmount", but it's not
    > > worth the trouble, AFAICS.
    >
    > I guess I'm not seeing what there is to propagate. If the vfsmount we
    > are moving is mounted under a vfsmount that's in a p-node, then there'd
    > be something to propagate, but since the --move doesn't change the
    > structure of mounts underneath the moved mountpoint, I wouldn't expect
    > any changes to be propagated from it to other mountpoints.
    >
    > I must be missing something fundamental....

    No - I have been missing a typo. Make that "if mountpoint of what we
    are moving...".
    -
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