lkml.org 
[lkml]   [2002]   [Jan]   [29]   [last100]   RSS Feed
Views: [more markup]   [less markup]   [headers]   [forward]  
 
Messages in this thread
/
SubjectRe: Note describing poor dcache utilization under high memory pressure
FromMomchil Velikov <>
Date29 Jan 2002 11:20:13 +0200
>>>>> "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 ?

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 11:15    [W:0.359 / U:0.060 seconds]
©2003-2008 Jasper Spaans