* Ross Lagerwall (ross.lagerw...@citrix.com) wrote: > Hi, > > I have found an issue where QEMU emits the RESUME event during startup when > it starts VM execution, but it is not possible to receive this event. > > To repro this, run: > qemu-system-i386 -m 256 -trace > enable=monitor_protocol_event_emit,file=/tmp/out -qmp > unix:/tmp/qmp,server,wait > > QEMU will not start execution of the VM until something connects to the QMP > socket (e.g. qmp-shell). Once connected, no event is received on the QMP > connection but the tracepoint is hit indicating that an event has been > emitted. I suspect that the event is emitted while the QMP client is doing > the initial negotiation. > > The reason I want to receive this event is that QEMU currently uses xenstore > to communicate this information to the Xen toolstack (see > xen-common.c:xen_change_state_handler) but we want to move to using QMP > rather than xenstore for this kind of thing. > > Is this a known issue or just a bug that should be fixed?
I'll leave it to Markus to say if it's a bug or not, but can't you work around this by starting qemu with -S which leaves the guest paused, and then continuing the guest when you have your QMP ? Dave > Thanks, > -- > Ross Lagerwall > -- Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK
