[Qemu-devel] Re: [PATCH 2/5] virtio-console: Add support for multiple ports for generic guest-host communication

[Anthony Liguori]

Amit Shah wrote:
> On (Fri) Sep 11 2009 [11:38:36], Anthony Liguori wrote:
>   
> > Amit Shah wrote:
> >     
> > > There wasn't any consensus; the discussion just ended abruptly.
> > >   
> > >       
> > At least Gerd and I were in violent agreement.  I don't think anyone  
> > disagreed.
> >     
>
> So how's suggestion about udev making symlinks based on the ports ids?
>   

That doesn't solve the problem that fqdn solves.  fqdn provides a means 
to avoid having to do centralized port number allocation.

> >  that's a problem for -M pc-0.11.0.  We need to have a way to specify  
> > a command line syntax with -M pc-0.11.0 such that the machine created  
> > matches what would have been created with qemu-0.11.0.  Otherwise, we  
> > have no hope of being able to do live migration or save/restore between  
> > versions.
> >     
>
> I don't actually know if I understand this completely. However, with the
> current behaviour, qemu just exits saying something like too many virtio
> consoles since the current MAX_VIRTIO_CONSOLES is defined to 1.
>   

Oh, that's goofy.  Sorry, I didn't realize that.

> > Why do you need the qdev pointer?
> >     
>
> To init a chardev in the port hotplug case, qdev_init_chardev() needs
> the qdev pointer.
>   

If you converted to a bus, this problem would go away.

> > I think that's next on Juan's list.
> >     
>
> Right; so we'll talk about that.
>
>                 Amit
>   

Regards,

Anthony Liguori