Re: [Qemu-devel] [PATCH] Migration compatibility for serial

[Paolo Bonzini]

On 17/06/2015 18:39, Michael S. Tsirkin wrote:
> > Same machine type.  Second is able to receive it.  First one is not.
> > Source don't know what is on the other side.  If user is going to put a:
> > 
> > --dont_send_serial_because_I_don't_care
> > 
> > Then it can as well just disable the serial device and live with it.
> 
> Just losing worst-case a couple of characters is not the same as
> losing serial functionality.

This is _not_ losing serial functionality.  Usually the FIFOs are not
migrated.  This is losing serial functionality _that wasn't being used
anyway_.

> We could have a flag to tell us what's on the other side,
> but that would need even more testing. So let's keep it
> simple.

Yes, let's keep it simple.  Let's keep it the same as 2.3 has been released.

Paolo