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    SubjectRe: [PATCH 0/7] hisi_sas: Misc bugfixes and an optimisation patch
    On Wed, Oct 10, 2018 at 09:58:25PM -0400, Martin K. Petersen wrote:
    > > This is because the IPTT index must be a unique value per HBA. However,
    > > if we switched to SCSI MQ, the block layer tag becomes unique per queue,
    > > and not per HBA.
    >
    > That doesn't sound right.

    blk-mq tags are always per-host (which has actually caused problems for
    ATA, which is now using its own per-device tags).

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