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    SubjectRe: VM Requirement Document - v0.0
    Date
    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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