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    SubjectRe: [2.5.70] possible problem with /dev/diskstats
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        Documentation/iostats.txt says about diskstats:
    [SNIP]
    Field 9 -- # of I/Os currently in progress
    The only field that should go to zero. Incremented as requests are
    given to appropriate request_queue_t and decremented as they finish.
    [SNIP]

    But here is a cat /proc/diskstats:
    3 0 hda 948 317 16216 4294408142 90 333 848 7309 4294967294 7309215 4280372198
    ~~~~~~~~~~

    Yes, I've had a couple of other reports of this. I suspect there is
    a path by which an "I/O" appears to have been completed while none was
    begun. I've only noticed this on my hda drive as well. What I didn't
    notice was exactly when this behavior began, which may have been useful
    in tracking down the problem. You'll notice a couple of other values
    there in the 4.2 billion range that probably suffer from a similar
    (or maybe the same) issue. I haven't seen this on SCSI drives yet,
    just hda drives, which suggests there may be something about that I/O
    path that bears some closer scrutiny.

    Rick
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