Messages in this thread | | | Date | Tue, 31 Jul 2007 03:32:23 -0500 | From | Andreas Dilger <> | Subject | Re: [RFC 12/26] ext2 white-out support |
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On Jul 31, 2007 09:44 +0200, Jan Blunck wrote: > Ok, this is pretty similar to the way I implemented this for tmpfs. The > problem is that the union mount code is explicitly checking if the filesystem > is supporting whiteout. I used to use a new filesystem flag (FS_WHITEOUT) for > this but thought that disk filesystem like ext2/3/4 will have problem with > that if you mount an old image. So I guess I still need a feature flag.
You also need whiteout support for extents. This could be done with unwritten extents potentially, or as I previously proposed (RFC) in linux-ext4.
Cheers, Andreas -- Andreas Dilger Principal Software Engineer Cluster File Systems, Inc.
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