An ammendment to my previous post...
> I see three page priority levels:
>
> 0 - accessed-never/aged to zero
> 1 - accessed-once/just loaded
> 2 - accessed-often
>
> with these transitions:
>
> 0 -> 1, if a page is accessed
> 1 -> 2, if a page is accessed a second time
> 1 -> 0, if a page gets old
> 2 -> 0, if a page gets old
Better:
1 -> 0, if a page was not referenced before arriving at the old end
1 -> 2, if it was
Meaning that multiple accesses to pages on the level 1 list are treated as a
single access. In addition, this reflects what we can do practically with
the hardware referenced bit.
--
Daniel
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