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    SubjectRe: [PATCH 10/21] block: Add fops atomic write support
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    Bart,

    > Are there any SCSI devices that we care about that report an ATOMIC
    > TRANSFER LENGTH GRANULARITY that is larger than a single logical
    > block?

    Yes.

    Note that code path used inside a storage device to guarantee atomicity
    of an entire I/O may be substantially different from the code path which
    only offers an incremental guarantee at a single logical or physical
    block level (to the extent that those guarantees are offered at all but
    that's a different kettle of fish).

    > I'm wondering whether we really have to support such devices.

    Yes.

    --
    Martin K. Petersen Oracle Linux Engineering

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