Re: [Qemu-devel] [PATCH 2/10] Allow the monitor to be suspended during non-blocking op

[Anthony Liguori]

Avi Kivity wrote:
> Anthony Liguori wrote:
> > Live migration happens in the background, but it is useful to make 
> > the monitor
> > command appear as if it's blocking.  This allows a management tool to
> > immediately know when the live migration has completed without having 
> > to poll
> > the migration status.
> >
> > This patch allows the monitor to be suspended from a monitor callback 
> > which
> > will prevent new monitor commands from being executed.
> >
> >   
>
> This means that migration is no longer transparent.  While migration 
> is going on, you can't change the cdrom media, look at cpu registers, 
> or do anything that requires the monitor.

On my TODO list is adding a '-d' option like we have in the KVM tree.  
It'll be there before it gets committed.

Regards,

Anthony Liguori

> This both reduces the functionality and complicates management 
> applications.  IMO migration should have asynchronous notification 
> (and no, I don't think multiple monitors is the correct solution).