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SubjectRe: [PATCH 1/3] copyfile: generic_sendpage
Christoph Hellwig wrote:
>
>>>Could you give some context please?
>
>
> Oh, I know what union mounts are. But I wonder who's hacking on them
> as they need some major VFS surgey to get right.
>

Ok, first sorry for the late reply. I'm working on a vfs-based
union-mount implementation for linux. The focus is on the basic
functionality explained by McKusick [1] without a need for a new
separate filesystem, without options like "before". "after", "in
between" or something like that, with permanent whiteouts if the fstype
supports them. For the copyup I plan to use Jörn's patch.
At the moment some basic stuff (actually the unions) is working, so you
actually can "see" something but I don't think that the patches are
ready for being posted now. Please relax and wait a few weeks because I
have to go back to university for some final exams. After that I'm back
for some more full-time hacking on union-mounts.

[1]:http://www.usenix.org/publications/library/proceedings/neworl/full_papers/mckusick.a

Regards,
Jan
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