linux-kernel - Re: [PATCH 0/7] hisi_sas: Misc bugfixes and an optimisation patch

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Message-ID: <yq18t354532.fsf@oracle.com>
Date:   Wed, 10 Oct 2018 21:58:25 -0400
From:   "Martin K. Petersen" <martin.petersen@...cle.com>
To:     John Garry <john.garry@...wei.com>
Cc:     <jejb@...ux.vnet.ibm.com>, <martin.petersen@...cle.com>,
        <linuxarm@...wei.com>, <linux-scsi@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/7] hisi_sas: Misc bugfixes and an optimisation patch


John,

> However it does block us in future from enabling SCSI MQ in the driver.

We're going to remove the legacy I/O path so I'm not particularly keen
on merging something that's going in the opposite direction.

> 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.

-- 
Martin K. Petersen	Oracle Linux Engineering