Re: [PATCH 6/7 v3] overlay: hybrid overlay filesystem prototype

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On Monday 27 September 2010 10:11:53 Miklos Szeredi wrote:
> [...] marking new directories opaque is only a half solution.
> E.g. consider the case when we have /a/b/c/ on the lower fs
> and /a/b/ on the upper, which is not opaque.  Then /a/b/c/ is created
> on the upper fs off-line.  The union logic can't notice that "c"
> should really be opaque and will merge with the contents of the lower
> layer.

I can think of arguments for either behavior, perhaps with a slight preference 
for your suggestion (default = opaque).

In any case, admins will need a way to flip opaque flags and remove undesired 
whiteouts.

Thanks,
Andreas
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