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Hi, All.
In my words, pages in memory is either resident or non-resident.
In linux internal, mapped or unmapped.
So number of non-resident pages is alway less than total number
of pages in memory.
Is your pages physics pages? or, it is Logical pages? However,
I think both is same here.
Waitting for your answer.
Thanks.
liyu
Song Jiang Wrote:
>On Mon, 2005-09-19 at 23:02, liyu wrote:>> >>> Let's assume Mn is the total number of non-resident pages in follow
>>words.
>>
>> Nod, 'M=Mh+Mc' and 'Mc+Mn' < 2M are always true.
>>
>> Have this implied that Mn is alway less than M? I think so.
>>
>>> Yes.
>
>
>
>> but if "Once the number exceeds M the memory size in number of pages,
>>we terminted the test period of the cold page pointed to by HAND-test."
>>
>> If Mn is alway less than M, when we move to HAND-test?
>>
>>
>
>The algorithm tries to ensure that Mn <= M holds.
>Once Mn == M+1 is detected, run HAND-test to bring it
>back to Mn == M. That is, only during the transition period,
>Mn <= M might not hold, and we make a correction quickly.
>
>So there is no contradiction here.
> Song
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