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    SubjectRe: [PATCH v7 0/6] block: Introduce REQ_ALLOCATE flag for REQ_OP_WRITE_ZEROES
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    Christoph,

    > I am very much against that for the following reason:
    >
    > - the current REQ_OP_DISCARD is purely a hint, and implementations can
    > (and do) choose to ignore it
    >
    > - REQ_OP_WRITE_ZEROES is an actual data integrity operation with
    > everything that entails

    If you want to keep emphasis on the "integrity operation" instead of the
    provisioning aspect, would you expect REQ_ALLOCATE (which may or may not
    zero blocks) to be considered a deterministic operation or a
    non-deterministic one? Should this depend on whether the device
    guarantees zeroing when provisioning blocks or not?

    --
    Martin K. Petersen Oracle Linux Engineering

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