Messages in this thread | | | Subject | Re: Note describing poor dcache utilization under high memory pressure | From | Momchil Velikov <> | Date | 29 Jan 2002 11:20:13 +0200 |
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>>>>> "Daniel" == Daniel Phillips <phillips@bonn-fries.net> writes:
Daniel> On January 29, 2002 09:39 am, Momchil Velikov wrote: >> >>>>> "Oliver" == Oliver Xymoron <oxymoron@waste.org> writes: Oliver> you can't actually _share_ the page tables without marking the pages Oliver> themselves readonly. >> >> Of course, ptes are made COW, just like now. Which brings up the >> question how much speedup we'll gain with a code that touches every >> single pte anyway ?
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 ?
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