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    SubjectRe: [RFC][PATCH 2/7] RSS controller core
    >>So what to do when virtual physical limit is hit?
    >>OOM-kill current task?
    >
    >
    > when the RSS limit is hit, but there _are_ enough
    > pages left on the physical system, there is no
    > good reason to swap out the page at all
    >
    > - there is no benefit in doing so (performance
    > wise, that is)
    >
    > - it actually hurts performance, and could
    > become a separate source for DoS
    >
    > what should happen instead (in an ideal world :)
    > is that the page is considered swapped out for
    > the guest (add guest penality for swapout), and
    > when the page would be swapped in again, the guest
    > takes a penalty (for the 'virtual' page in) and
    > the page is returned to the guest, possibly kicking
    > out (again virtually) a different page

    great. I agree with that.
    Just curious why current vserver code kills arbitrary
    task in container then?


    >>> - accounting and limits have to be consistent
    >>> and should roughly represent the actual used
    >>> memory/swap (modulo optimizations, I can go
    >>> into detail here, if necessary)
    >>
    >>This is true for current implementation for
    >>booth - this patchset ang OpenVZ beancounters.
    >>
    >>If you sum up the physpages values for all containers
    >>you'll get the exact number of RAM pages used.
    >
    >
    > hmm, including or excluding the host pages?

    depends on whether you will include beanocunter 0 usages or not :)

    Kirill
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