From: "Jamie Lokier" <[EMAIL PROTECTED]>
> Manfred Spraul wrote:
> > I'm not sure that this is the right way: It means that every exec()
> > must call dup_mmap(), and usually only to copy a few hundert
> > bytes. But I don't see a sane alternative. I won't propose to
> > create a temporary file in a kernel tmpfs mount ;-)
>
> Every exec creates a whole new mm anyway, after copying data from the
> old mm. The suggestion is to create the new mm before copying the
> data, and to copy the data from the old mm directly to the new one.
>
exec_mmap currenly avoids mm_alloc()/activate_mm()/mm_drop() for single
threaded apps, and that would become impossible.
I'm not sure how expensive these calls are.
--
Manfred
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