Re: process creation time increases linearly with shmem

[Linus Torvalds]

On Fri, 26 Aug 2005, Nick Piggin wrote:
> 
> > Skipping MAP_SHARED in fork() sounds like a good idea to me...
> > 
> 
> Indeed. Linus, can you remember why we haven't done this before?

Hmm. Historical reasons. Also, if the child ends up needing it, it will 
now have to fault them in.

That said, I think it's a valid optimization. Especially as the child 
_probably_ doesn't need it (ie there's at least some likelihood of an 
execve() or similar).

		Linus
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