[Xen-devel] Re: [PATCH 08/15] xen: Read and write the state of the VM in xenstore

[Paolo Bonzini <pbonzini@xxxxxxxxxx>]

On 08/16/2010 01:15 PM, Stefano Stabellini wrote:
> On Sun, 15 Aug 2010, Paolo Bonzini wrote:
> > On 08/13/2010 02:53 PM, Anthony Liguori wrote:
> > > On 08/12/2010 09:09 AM, stefano.stabellini@xxxxxxxxxxxxx wrote:
> > > > From: Anthony PERARD<anthony.perard@xxxxxxxxxx>
> > > >
> > > > Introduce functions to read and write the state of the VM in xenstore.
> > > This basically creates a new management interface for QEMU via the
> > > xenstore.
> > >
> > > Our management interface is QMP. If you want to maintain compatibility,
> > > you'll need to write a QMP ->  xenstore daemon that maps events
> > > appropriately.
> > This would belong in xl/libxl.
> Yes, but considering that we don't want a xenstore-based management
> interface I would gladly do without the compatibility daemon.
> We'll try to reduce all the xenstore interaction to the bare minimum,
> and use QMP everywhere else.
Yes, I was just pointing out that you don't need a new compatibility 
daemon.  Since xl is already daemonizing itself to handle on_crash and 
friends, it could also set up all the watches it cares about, and 
convert them to QMP commands.  It's all more code that needs to be 
written of course, and boring stuff even. :)
Paolo

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