Re: [uml-devel] Separate COW patch.

[Michael R. <mc...@sa...>]

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If you are going to spend time on this, go look at the "union" file system
type available in BSDs and the "Translucent" in Solaris.

I think that some people have tried to do this before... usually, it is
a variation of the "null" mount.

It permits one to layer one filesystem on top of another file system, and
have all modifications go to the upper one. This is done on a *per-file*
basis, not on a block file system. 

COW is about blocks, not files. This may be more appropriate for your use,
or it might not be.

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