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    SubjectRe: Bio pool & scsi scatter gather pool usage
    Alan Cox wrote:
    > > Perhaps, but calls are expensive. Repeated calls down stacked block
    > > devices will add up. In only the most unusually cases will there
    > You don't need to repeatedly query. At bind time you can compute the
    > limit for any device heirarchy and be done with it.

    S'pose so. The ideal request size is variable, based
    on the alignment. So for exampe if the start block is
    halfway into a stripe, the ideal BIO size is half a stripe.

    But that's a pretty simple table to generate once-off,
    as you say.

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