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    SubjectRe: [patch] Make diskstats per-cpu using kmalloc_percpu
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        This version makes the disk stats on struct gendisk per-cpu.
    I am working on making the per partition stats per-cpu too (struct
    hd_struct).

    In general I'm in favor of this. It seems intuitive to me that counters
    of this type should be per-cpu. But the question is, do we actually
    see any gains? At the very least, are we sure we've not introduced any
    degradation? Has any of your testing so far been measuring performance or
    just checking for correctness?

    Rick
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