Messages in this thread | | | From | Daniel Phillips <> | Subject | Re: Note describing poor dcache utilization under high memory pressure | Date | Tue, 29 Jan 2002 13:33:57 +0100 |
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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.
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