[Trac #835] Investigate 4M PTE/TLB caching on the Geode

Zarro Boogs per Child bugtracker at laptop.org
Fri Jan 26 16:52:13 EST 2007


#835: Investigate 4M PTE/TLB caching on the Geode
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 Reporter:  marcelo  |        Owner:  marcelo
     Type:  defect   |       Status:  new    
 Priority:  normal   |    Milestone:  BTest-3
Component:  kernel   |   Resolution:         
 Keywords:           |  
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Comment (by JordanCrouse):

 There is no doubt all the support is there, I just don't know if its a
 very good idea or not.  Its true that 4MB pages means less page faults,
 and less TLB thrash, but on the other hand, with only 119 MB of usable
 memory, partitioning it off into 4Mb pages means a goodly amount of unused
 space for 99% of our applications, especially all the little tasks and
 daemons that only need a few hundred K at the most.  It just doesn't
 really seem to make sense to me given our limited resources.  I vote we
 stick with 4k pages.

-- 
Ticket URL: <http://dev.laptop.org/ticket/835#comment:3>
One Laptop Per Child <http://laptop.org/>



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