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Re: [Xen-devel] what happens when a PoD page is touched?

  • To: Paul Durrant <Paul.Durrant@xxxxxxxxxx>
  • From: George Dunlap <George.Dunlap@xxxxxxxxxxxxx>
  • Date: Tue, 17 May 2011 12:32:35 +0100
  • Cc: Tim Deegan <Tim.Deegan@xxxxxxxxxxxxx>, James Harper <james.harper@xxxxxxxxxxxxxxxx>, xen devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • Delivery-date: Tue, 17 May 2011 04:33:40 -0700
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On Tue, May 17, 2011 at 10:28 AM, Paul Durrant <Paul.Durrant@xxxxxxxxxx> wrote:
>> Where does the sweep start? Does it sweep in physical address order
>> from lowest address to highest? If I allocated some memory with a
>> low physical address and zero'd it and then didn't touch it would
>> that be found first?
>>
>
> I can't remember off the top of my head. I think we sweep from low to high.

Just checked: we sweep high to low.  I believe that's because that's
the way the Windows scrubber goes.

 -George

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