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    SubjectRe: [PATCH 10 of 20] ipath - support for userspace apps using core driver
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     > Bad page state at free_hot_cold_page (in process 'mpi_hello', page ffff810002098af8)
    > flags:0x0100000000000404 mapping:0000000000000000 mapcount:0 count:0 (Not tainted)

    You're setting PG_reserved somewhere. That's deprecated now. Just do
    get_page() unconditionally and be happy. I don't think there's any
    way that your pages could be swapped out, even though you don't do
    SetPageReserved().

    - R.
    -
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