Messages in this thread | | | Date | Thu, 01 Dec 2011 09:49:20 +0100 | From | Paolo Bonzini <> | Subject | Re: virtio-scsi spec (was Re: [PATCH] Add virtio-scsi to the virtio spec) |
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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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