Re: process creation time increases linearly with shmem

[Nick Piggin]

Rik van Riel wrote:
> On Thu, 25 Aug 2005, Nick Piggin wrote:
>
>
> > fork() can be changed so as not to set up page tables for
> > MAP_SHARED mappings. I think that has other tradeoffs like
> > initially causing several unavoidable faults reading
> > libraries and program text.
>
>
> Actually, libraries and program text are usually mapped
> MAP_PRIVATE, so those would still be copied.

Yep, that seems to be the case here.

> Skipping MAP_SHARED in fork() sounds like a good idea to me...

Indeed. Linus, can you remember why we haven't done this before?

--
SUSE Labs, Novell Inc.

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