Messages in this thread | | | Date | Wed, 1 Aug 2007 16:13:46 +0100 (BST) | From | Hugh Dickins <> | Subject | Re: [RFC 11/26] tmpfs white-out support |
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On Mon, 30 Jul 2007, Jan Blunck wrote:
> Introduce white-out support to tmpfs. > > Signed-off-by: Jan Blunck <jblunck@suse.de> > --- > include/linux/shmem_fs.h | 1 > mm/shmem.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++ > 2 files changed, 55 insertions(+)
I see there's debate about whether this (and its fellows) give the right semantic to whiteouts; and I've not begun to think about that.
But as a patch to tmpfs for what you're trying to do, it looks just about fine. I say "just about" because the reference counting looks right, but I wouldn't dare say that it _is_ right without testing.
And I'd probably want to add a minor adjustment, so that a mount with nr_inodes=1000 could still support exactly 1000 inodes, despite your allocating one for the whiteout (usually never used) at mount time. But that can follow along later, no problem.
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