Il 04/07/2013 09:39, Michael S. Tsirkin ha scritto:
>>>>> > > > > Mainly because I'm not sure that *all* devices are now safe.  Are 
>>>>> > > > > they?
>>>> > > >
>>>> > > > virtio-scsi's implementation in QEMU is not safe (been delaying that 
>>>> > > > for
>>>> > > > too long, sorry), but the spec is safe.
>>> > > 
>>> > > Then if we added a transport feature, we couldn't use it :(
>> > 
>> > Transport feature bits are still negotiated per device though.
>> > virtio-scsi devices in QEMU would not negotiate that feature.
>> > 
>> > Paolo
>> > 
>>> > > So I think it needs to be a per-device feature bit.
> We don't know that it's helpful for any devices besides -net
> so I'd say keep it simple.

Then we should stop calling it a "device model bug".

If we call it a bug, we must strive for support in all devices.  If we
don't care, we should stop calling it a bug.

Paolo
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