Re: [PATCH] cowlinks v2

Erik Andersen
2004-04-03T01:21:39Z

On Sat Apr 03, 2004 at 02:04:25AM +0100, Jamie Lokier 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.

-Erik

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Erik B. Andersen http://codepoet-consulting.com/
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