linux-kernel - Re: [PATCH] virtio_scsi: Always try to read VPD pages

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Message-ID: <yq1mvbcrnyf.fsf@oracle.com>
Date:   Wed, 19 Apr 2017 19:12:56 -0400
From:   "Martin K. Petersen" <martin.petersen@...cle.com>
To:     David Gibson <david@...son.dropbear.id.au>
Cc:     stefanha@...hat.com, pbonzini@...hat.com, famz@...hat.com,
        jejb@...ux.vnet.ibm.com, martin.petersen@...cle.com,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] virtio_scsi: Always try to read VPD pages


David,

> Passed through SCSI targets may have transfer limits which come from
> the host SCSI controller something on the host side other than the
> target itself.
>
> To make this work properly, the hypervisor can adjust the target's VPD
> information to advertise these limits.  But for that to work, the
> guest has to look at the VPD pages, which we won't do by default if it
> is an SPC-2 device, even if it does actually support it.

Applied to 4.12/scsi-queue.

-- 
Martin K. Petersen	Oracle Linux Engineering