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SubjectRe: [PATCH] cowlinks v2
Erik Andersen wrote:
> > Here's a tricky situation:
> >
> > 1. A file is cowlinked. Then each cowlink is mmap()'d, one per process.
> >
> > 2. At this point both mappings share the same pages in RAM.
> >
> > 3. Then one of the cowlinks is written to...
>
> Using mmap with PROT_WRITE on a cowlink must preemptively
> break the link.

I forget to mention, they are PROT_READ shared mappings.

-- Jamie
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