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    SubjectRe: [HMM 12/15] mm/migrate: new memory migration helper for use with device memory v4
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    On 7/14/17 5:55 PM, Jerome Glisse wrote:
    > So pushed an updated hmm-next branch this should fix all issues you had.
    > Thought i am not sure about the test in this mail, all i see is that it
    > continously spit error messages but it does not hang (i let it run 20min
    > or so). Dunno if that is what expected. Let me know if this is still an
    > issue and if so what should be the expected output of this test program.
    >
    > Cheers,
    > Jérôme

    Thanks, Jerome. The kernel hang indeed seems to be fixed.

    Regarding the last issue I reported. It still persists. The test program
    should eventually exit. Instead, it loops indefinitely (sorry, I was not
    clear when I called it 'app-side hang').

    This is what's expected. The number of error messages can be random, but
    must be finite; the program must print "OK" at the end:

    $ ./run.sh
    &&& 1 migrate threads: STARTING
    iteration 0
    thread 0 is migrating 10000 pages starting from 0x7f6abce79000
    migrate_thread_func:87: failed to migrate pages at 0x7f6abce79000
    (migrate.npages (tid 0): 9725 != npages: 10000)
    thread 0 is migrating 10000 pages starting from 0x7f6abce79000
    thread 0 is migrating 10000 pages starting from 0x7f6abce79000
    &&& 1 migrate threads: PASSED
    (OK)[./sanity_rmem004] anon migration read test

    Thanks,

    --
    Evgeny Baskakov
    NVIDIA

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