Re: Repeated fork() causes SLAB to grow without bound

[Michel Lespinasse]

On Mon, Aug 20, 2012 at 4:53 AM, Michel Lespinasse <walken@xxxxxxxxxx> wrote:
> I wonder if it might help to add the child VMA onto the parent's
> anon_vma only at the first child COW event. That way it would at least
> be possible (with userspace changes) for any forking servers to
> separate the areas they want to write into from the parent (such as
> things that need expensive initialization), from the ones that they
> want to write into from the child, and have none of the anon_vma lists
> grow too large.

Actually that wouldn't work. The parent's anon pages are visible from
the child, so the child vma needs to be on the parent anon_vma list.
Sorry for the noise :/

-- 
Michel "Walken" Lespinasse
A program is never fully debugged until the last user dies.
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