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    SubjectRE: [perfmon2] [PATCH] perf_events: improve DS/BTS/PEBS buffer allocation
    > I am not aware of any real technical issues, except that
    > it needs to be done for both 32bit and 64bit.

    Some good documentation on when you need vmalloc_sync_all(), and
    why most places don't need it would help to avoid a surge of
    patches spraying calls to it all over the kernel.


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