Messages in this thread | | | Date | Thu, 4 Sep 2003 14:49:51 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: [PATCH] Alternate futex non-page-pinning and COW fix |
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On Thu, 4 Sep 2003, Jamie Lokier wrote: > > * A futex on a MAP_PRIVATE must be mm-local: the canonical > * example being MAP_PRIVATE of /dev/zero.
Actually, /dev/zero is a special case in itself. It is an anonymous mapping, and is equivalent to MAP_ANON for private mappings. For MAP_SHARED it is something _totally_ different.
So /dev/zero isn't even an interesting case.
> Unfortunately I think the above 5 conditions do not have a consistent > solution. Please prove me wrong :)
I don't think there is any inconsistency.
Linus
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