Re: Note describing poor dcache utilization under high memory pressure

[Helge Hafting]

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.

Helge Hafting