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SubjectRe: Note describing poor dcache utilization under high memory pressure
Date
On January 29, 2002 12:54 pm, Helge Hafting wrote:
> Momchil Velikov wrote:
> >
> > >>>>> "Daniel" == Daniel Phillips <phillips@bonn-fries.net> writes:
> [...]
> > Daniel> It's only touching the ptes on tables that are actually used, so if a parent
> > Daniel> with a massive amount of mapped memory forks a child that only instantiates
> > Daniel> a small portion of it (common situation) then the saving is pretty big.
> >
> > Umm, all the ptes af the parent ought to be made COW, no ?
>
> Sure. But quite a few of them may be COW already, if the parent
> itself is a result of some earlier fork.

Right, or if the parent has already forked at least one child.

--
Daniel
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