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SubjectRe: thread rant


On Sat, 2 Sep 2000, Ingo Molnar wrote:

> well, Linux SysV shared memory indeed has a 'software version' of
> pagetables, this way if one process faults in a new page (because all
> pages are unmapped originally), then the new physical page address can be
> discovered by all other subsequent faults in other process contexts. It
> works just fine - the thing i dislike about SysV shared memory is not the
> VM part but its 'filesystem characteristics' - i think anonymous shared
> memory is the way to go.

Why? I would say that bad thing about SysV shared memory is that it's
_not_ sufficiently filesystem-thing - a special API where 'create a file
on ramfs and bloody mmap() it' would be sufficient. Why bother with
special sets of syscalls?

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