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SubjectRe: virtio-scsi spec (was Re: [PATCH] Add virtio-scsi to the virtio spec)
On 12/01/2011 10:52 AM, Hannes Reinecke wrote:
>>>>
>>> I would like to have the other request_queue limitations exposed
>>> here, too.
>>> Most notably we're missing the maximum size of an individual segment
>>> and the maximum size of the overall I/O request.
>>
>> The virtio transport does not put any limit, as far as I know.
>>
> Virtio doesn't, but the underlying device/driver might.
> And if we don't expose these values we cannot format the request correctly.

These limits should be per target/LUN, so it seems like material for
another controlq command when the need arises. For now, I'd really
prefer to have the spec match the implementation (plus a few SAM
bogosities).

Paolo


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