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DateThu, 4 Sep 2003 11:46:28 -0700 (PDT)
FromLinus Torvalds <>
SubjectRe: [PATCH] Alternate futex non-page-pinning and COW fix

On Thu, 4 Sep 2003, Jamie Lokier wrote:
>
> * I contend that the user-visible behaviour of a mapping should
> * _not_ depend on whether the file was opened with O_RDWR or O_RDONLY.

And I violently agree. But I also add the _other_ requirement:

* I contend that user-visible behaviour of a mapping should be 100% the
* same for a unwritable MAP_SHARED and a unwritten MAP_PRIVATE

Put the two together, and see what you get. You get the requirement that
if MAP_SHARED works, then MAP_PRIVATE also has to work.

That's my requirement. Consistency.

Linus



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