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    SubjectRe: 2.6.17-rc5-mm1
    On Mon, 5 Jun 2006, Arjan van de Ven wrote:

    > > Swap migration uses the two higest numbers of swap types (30 and 31). If
    > > those are generated by something then we could have trouble but I do not
    > > see how the patches could hurt otherwise.
    > ltp has many weird swap tests
    >
    > (and I assume you're not talking about the pte's that are swapped, but
    > only the file type in the swap signature; since the higher bits in the
    > pte are used by the non-linear vma feature afaik)

    How was the kernel compiled? It must have been running on a NUMA system
    for page migration to be enabled. Otherwise the fallback definitions in
    include/linux/swapops.h should remove all the swap migration entry
    handling.
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