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    SubjectRe: Disk Performance Measurements
    On Thu, May 03 2001, Shaun wrote:
    > Again, this isn't the case in the 2.2.16 kernel I'm working with. Each
    > call to make_request() causes pgin/pgout to be incremented, since these
    > requests can be of different sizes (even for the same disk) I can't see
    > how a kb value can be deduced.

    Check if the latest 2.2 is correct then, 2.4 is.

    > Just as a question though, a disk/partition doesn't need to have a
    > filesystem on it, so why is the "correct_size" for a buffer request on the
    > block device defined based on a filesystem block system?

    It's not, but the fs may set the block size (ext2 does).

    Jens Axboe

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