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[Xen-devel] RE: [PATCH][1/10] Device model cleanup.

To: "Arun Sharma" <arun.sharma@xxxxxxxxx>
Subject: [Xen-devel] RE: [PATCH][1/10] Device model cleanup.
From: "Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>
Date: Thu, 30 Jun 2005 20:28:40 +0100
Cc: Ian Pratt <Ian.Pratt@xxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx
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Thread-index: AcV9o3o+rrr8rh8lSOitXUry+7cczQABFiPg
Thread-topic: [PATCH][1/10] Device model cleanup.
> > * I presume that the vncviewer is being forked from xm, but 
> that the 
> > vncconect is being issued from xend, which is why it needs 
> the $DISPLAY
> > ?    
> Rolf applied a patch sometime back that has two separate ways 
> of connect a vncviewer to device models:
> a) vncviewer -listen (port communicated to xend and then to 
> qemu via -vncconnect). This is forked from xm.
> b) libvncserver within qemu-dm (-vncport). This is forked from xend.
> And then
> c) the user may choose vnc=0 sdl=1.

Just to check I understand:

In (a), xm forks off vncviewer, qemu-dm runs libvncserver and then
connects back to the viewer.  I presume we can still fix the local port
with -vncport?

In (b), what is actually forking the vncviewer, and when does it know
that the libvncserver is up and running?

For (c), we just pop up an Xwindow on the Display.
> > * we still need some tests when building to ensure libvncserver and 
> > libsvg are installed. As the current behaviour when they're not is 
> > confusing -- I think its better to refuse to build ioemu if they're 
> > not installed.
> Not all distributions are shipping libvncserver (for eg: FC4 didn't). 
> Once we resolve that I think it's a reasonable thing to do.

Can we fail to support vnc gracefully at run time if the library isn't
I'd rather still ensure that support was always built into the qemu-dm
binary by ensuring the header files are present.


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