Re: Note describing poor dcache utilization under high memory pressure

[Daniel Phillips]

On January 29, 2002 12:54 pm, Helge Hafting wrote:
> Momchil Velikov wrote:
> > 
> > >>>>> "Daniel" == Daniel Phillips <[e-mail]> 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