On 15/12/2014 14:37, Dr. David Alan Gilbert wrote:
>> > Right, the question is whether you really want to do this. :)
> Well, it would solve this type of problem less painfully, your migration
> would always succeed and destinations that knew what to do with it would
> always do the right thing.
* Paolo Bonzini (pbonz...@redhat.com) wrote:
>
>
> On 15/12/2014 14:30, Dr. David Alan Gilbert wrote:
> > Anyone who really cares about backwards migration compatibility would
> > probably have to guard the subsection with the machine-type to avoid
> > (e) ever happening (the heuristic from (c) m
On 15/12/2014 14:30, Dr. David Alan Gilbert wrote:
> Anyone who really cares about backwards migration compatibility would
> probably have to guard the subsection with the machine-type to avoid
> (e) ever happening (the heuristic from (c) might be useful to add).
Right.
> although if you do hav
* Paolo Bonzini (pbonz...@redhat.com) wrote:
>
>
> On 15/12/2014 11:46, Dr. David Alan Gilbert wrote:
> > I can see this causes the thr_ipending to be 0 more of the time, but I don't
> > see why it's sufficient.
> >
> > If the transmitter has just transmitted it's last byte, then thr_ipending
>
On 15/12/2014 11:46, Dr. David Alan Gilbert wrote:
> I can see this causes the thr_ipending to be 0 more of the time, but I don't
> see why it's sufficient.
>
> If the transmitter has just transmitted it's last byte, then thr_ipending is
> set
> true by serial_xmit, however if there is a higher
* Paolo Bonzini (pbonz...@redhat.com) wrote:
> This is responsible for failure of migration from 2.2 to 2.1, because
> thr_ipending is always one in practice.
>
> serial.c is setting thr_ipending unconditionally. However, thr_ipending
> is not used at all if THRI=0, and it will be overwritten aga
This is responsible for failure of migration from 2.2 to 2.1, because
thr_ipending is always one in practice.
serial.c is setting thr_ipending unconditionally. However, thr_ipending
is not used at all if THRI=0, and it will be overwritten again the next
time THRE or THRI changes. For that reason
