Verification done on jammy-proposed.
---

Part 1: comment #2, libvirt starts without errors, and can list and manage the domain.
Part 2: comment #5, libvirt restarts without errors 100 times with 10 domains.

Environment:
---

LXD virtual machine

	lxc launch --vm ubuntu:jammy lp2059272-jammy
	lxc exec lp2059272-jammy -- su - ubuntu

Enable -proposed

	sudo add-apt-repository -yp proposed

	cat <<EOF | sudo tee /etc/apt/preferences.d/proposed
	Package: *
	Pin: release a=jammy-proposed
	Pin-Priority: 400
	EOF

Install

	sudo apt install -y -t jammy-proposed libvirt-daemon libvirt-daemon-system libvirt-daemon-driver-qemu 
	sudo apt install -y gdb qemu-system-x86

	$ apt-cache policy libvirt-daemon
	libvirt-daemon:
	  Installed: 8.0.0-1ubuntu7.9
	  Candidate: 8.0.0-1ubuntu7.9
	  Version table:
	 *** 8.0.0-1ubuntu7.9 400
		400 http://security.ubuntu.com/ubuntu jammy-proposed/main amd64 Packages
		400 http://archive.ubuntu.com/ubuntu jammy-proposed/main amd64 Packages
		100 /var/lib/dpkg/status
	     8.0.0-1ubuntu7.8 500
		500 http://archive.ubuntu.com/ubuntu jammy-updates/main amd64 Packages
	     8.0.0-1ubuntu7.5 500
		500 http://security.ubuntu.com/ubuntu jammy-security/main amd64 Packages
	     8.0.0-1ubuntu7 500
		500 http://archive.ubuntu.com/ubuntu jammy/main amd64 Packages

Part 1:
---

GDB
...

Check there are 2 threads: cleanup and domain status XML save

	(gdb) i th
	  Id   Target Id                                     Frame
	  1    Thread 0x7fe039120ac0 (LWP 3405) "libvirtd"   qemuStateCleanup () at ../../src/qemu/qemu_driver.c:1070
	  18   Thread 0x7fe00ffff640 (LWP 3425) "gmain"      (running)
	  19   Thread 0x7fe00f7fe640 (LWP 3426) "gdbus"      (running)
	  20   Thread 0x7fe00effd640 (LWP 3473) "udev-event" (running)
	  24   Thread 0x7fe014e07640 (LWP 3600) "vm-test-vm" (running)
	  25   Thread 0x7fe00dffb640 (LWP 3620) "qemu-event" virDomainObjSave (obj=0x7fe028301a30, xmlopt=0x7fe028040010, statusDir=0x7fe0280373b0 "/run/libvirt/qemu") at ../../src/conf/domain_conf.c:28879

Confirm the qemu driver's domain xml formatter/options is set/referenced:

	(gdb) t 25

	(gdb) p xmlopt.privateData.format
	$1 = (virDomainXMLPrivateDataFormatFunc) 0x7fe0176b4da0 <qemuDomainObjPrivateXMLFormat>

	(gdb) p xmlopt.parent.parent_instance
	$2 = {g_type_instance = {g_class = 0x7fe02806cf20}, ref_count = 1, qdata = 0x0}

Let the cleanup function and shutdown path finish

	(gdb) t 1
	(gdb) c &

	(gdb) t 25

Check the formatter/options again; it is *STILL* referenced:

	(gdb) p xmlopt.privateData.format
	$3 = (virDomainXMLPrivateDataFormatFunc) 0x7fe0176b4da0 <qemuDomainObjPrivateXMLFormat>

	(gdb) p xmlopt.parent.parent_instance
	$4 = {g_type_instance = {g_class = 0x7fe02806cf20}, ref_count = 1, qdata = 0x0}

Check the VM status XML *before* the save function finishes:

	$ sudo grep -e '<domstatus' -e '<domain' -e 'monitor path' /run/libvirt/qemu/test-vm.xml
	<domstatus state='running' reason='booted' pid='3597'>
	  <monitor path='/var/lib/libvirt/qemu/domain-1-test-vm/monitor.sock' type='unix'/>
	  <domain type='qemu' id='1'>

Let the save function continue, and libvirt finishes shutting down:

	(gdb) c
	...
	[Inferior 1 (process 3405) exited normally]

Check the VM status XML *after*:

	$ sudo grep -e '<domstatus' -e '<domain' -e 'monitor path' /run/libvirt/qemu/test-vm.xml
	<domstatus state='running' reason='booted' pid='3597'>
	  <monitor path='/var/lib/libvirt/qemu/domain-1-test-vm/monitor.sock' type='unix'/>
	  <domain type='qemu' id='1'>
	 
It *CONTINUES* to have the 'monitor path' tag/field.

Now, the next time libvirtd starts, it *CORRECTLY* parses that XML:

	$ sudo systemctl start libvirtd.service
	$ journalctl -b -u libvirtd.service | tail | grep error
	$

And libvirt is now aware of the domain, and can manage it:

	$ virsh list
	 Id   Name      State
	-------------------------
	 1    test-vm   running

	$ virsh destroy test-vm
	Domain 'test-vm' destroyed

Part 2:
---

$ for i in {1..100}; do echo restart $i; sudo systemctl restart libvirtd.service; sleep 10; done
restart 1
restart 2
restart 3
...
restart 98
restart 99
restart 100

No errors:

$ journalctl -b -u libvirtd.service | grep -v -e 'systemd' -e 'hostname:' | cut -d' ' -f7- | sort | uniq -c | sort -rn
    106 /var/lib/libvirt/dnsmasq/default.hostsfile
    106 /var/lib/libvirt/dnsmasq/default.addnhosts - 0 names
    106 /etc/hosts - 8 names