Public bug reported:
I have upgraded to QEmu 1.7.0 (Debian 1.7.0+dfsg-2) but now when I try
to restore a live snapshot made in QEmu 1.6.0 (Debian 1.6.0+dfsg-1) I
see that the VM boots from scratch instead of starting directly in the
snapshot's running state.
Furthermore if the VM is already running and I try to revert to the
snapshot again I get the following message:
$ virsh --connect qemu:///system snapshot-revert fgtbbuild wtb; echo $?
error: operation failed: Error -22 while loading VM state
1
I have test VMs with live snapshots corresponding to different testing
configurations. So I typically revert the VMs in one of the live
snapshots and run the tests. It would be pretty annoying to have to
recreate all these live snapshots any time I upgrade QEmu bug it looks
like I'll have to do it again.
This all sounds very much like bug 1123975 where QEmu 1.3 broke
compatibility with previous versions live snapshots :-(
Here is the command being run by libvirt:
/usr/bin/qemu-system-x86_64 -name fgtbbuild -S -machine
pc-1.1,accel=kvm,usb=off -m 512 -realtime mlock=off -smp
4,sockets=4,cores=1,threads=1 -uuid f510955c-17de-9907-1e33-dfe1ef7a08b6
-no-user-config -nodefaults -chardev
socket,id=charmonitor,path=/var/lib/libvirt/qemu/fgtbbuild.monitor,server,nowait
-mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-
shutdown -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive
file=/mnt/storage1/qemu/fgtbbuild.qcow2,if=none,id=drive-virtio-
disk0,format=qcow2,cache=writeback -device virtio-blk-
pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio-
disk0,bootindex=1 -drive if=none,id=drive-
ide0-0-0,readonly=on,format=raw -device ide-cd,bus=ide.0,unit=0,drive
=drive-ide0-0-0,id=ide0-0-0 -netdev
tap,fd=25,id=hostnet0,vhost=on,vhostfd=26 -device virtio-net-
pci,netdev=hostnet0,id=net0,mac=52:54:00:0a:3c:e8,bus=pci.0,addr=0x3
-chardev pty,id=charserial0 -device isa-
serial,chardev=charserial0,id=serial0 -device usb-tablet,id=input0 -vnc
127.0.0.1:0 -device qxl-
vga,id=video0,ram_size=67108864,vram_size=67108864,bus=pci.0,addr=0x2
-device intel-hda,id=sound0,bus=pci.0,addr=0x4 -device hda-
duplex,id=sound0-codec0,bus=sound0.0,cad=0 -device virtio-balloon-
pci,id=balloon0,bus=pci.0,addr=0x6 -loadvm wtb
ipxe-qemu 1.0.0+git-20120202.f6840ba-3
qemu 1.7.0+dfsg-2
qemu-keymaps 1.7.0+dfsg-2
qemu-slof 20130430+dfsg-1
qemu-system 1.7.0+dfsg-2
qemu-system-arm 1.7.0+dfsg-2
qemu-system-common 1.7.0+dfsg-2
qemu-system-mips 1.7.0+dfsg-2
qemu-system-misc 1.7.0+dfsg-2
qemu-system-ppc 1.7.0+dfsg-2
qemu-system-sparc 1.7.0+dfsg-2
qemu-system-x86 1.7.0+dfsg-2
qemu-user 1.7.0+dfsg-2
qemu-utils 1.7.0+dfsg-2
libvirt-bin 1.1.4-2
libvirt0 1.1.4-2
libvirtodbc0 6.1.6+dfsg-4
** Affects: qemu
Importance: Undecided
Status: New
--
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https://bugs.launchpad.net/bugs/1259499
Title:
QEmu 1.7.0 cannot restore a 1.6.0 live snapshot made in qemu-system-
x86_64
Status in QEMU:
New
Bug description:
I have upgraded to QEmu 1.7.0 (Debian 1.7.0+dfsg-2) but now when I try
to restore a live snapshot made in QEmu 1.6.0 (Debian 1.6.0+dfsg-1) I
see that the VM boots from scratch instead of starting directly in the
snapshot's running state.
Furthermore if the VM is already running and I try to revert to the
snapshot again I get the following message:
$ virsh --connect qemu:///system snapshot-revert fgtbbuild wtb; echo $?
error: operation failed: Error -22 while loading VM state
1
I have test VMs with live snapshots corresponding to different testing
configurations. So I typically revert the VMs in one of the live
snapshots and run the tests. It would be pretty annoying to have to
recreate all these live snapshots any time I upgrade QEmu bug it looks
like I'll have to do it again.
This all sounds very much like bug 1123975 where QEmu 1.3 broke
compatibility with previous versions live snapshots :-(
Here is the command being run by libvirt:
/usr/bin/qemu-system-x86_64 -name fgtbbuild -S -machine
pc-1.1,accel=kvm,usb=off -m 512 -realtime mlock=off -smp
4,sockets=4,cores=1,threads=1 -uuid f510955c-
17de-9907-1e33-dfe1ef7a08b6 -no-user-config -nodefaults -chardev
socket,id=charmonitor,path=/var/lib/libvirt/qemu/fgtbbuild.monitor,server,nowait
-mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-
shutdown -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive
file=/mnt/storage1/qemu/fgtbbuild.qcow2,if=none,id=drive-virtio-
disk0,format=qcow2,cache=writeback -device virtio-blk-
pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio-
disk0,bootindex=1 -drive if=none,id=drive-
ide0-0-0,readonly=on,format=raw -device ide-cd,bus=ide.0,unit=0,drive
=drive-ide0-0-0,id=ide0-0-0 -netdev
tap,fd=25,id=hostnet0,vhost=on,vhostfd=26 -device virtio-net-
pci,netdev=hostnet0,id=net0,mac=52:54:00:0a:3c:e8,bus=pci.0,addr=0x3
-chardev pty,id=charserial0 -device isa-
serial,chardev=charserial0,id=serial0 -device usb-tablet,id=input0
-vnc 127.0.0.1:0 -device qxl-
vga,id=video0,ram_size=67108864,vram_size=67108864,bus=pci.0,addr=0x2
-device intel-hda,id=sound0,bus=pci.0,addr=0x4 -device hda-
duplex,id=sound0-codec0,bus=sound0.0,cad=0 -device virtio-balloon-
pci,id=balloon0,bus=pci.0,addr=0x6 -loadvm wtb
ipxe-qemu 1.0.0+git-20120202.f6840ba-3
qemu 1.7.0+dfsg-2
qemu-keymaps 1.7.0+dfsg-2
qemu-slof 20130430+dfsg-1
qemu-system 1.7.0+dfsg-2
qemu-system-arm 1.7.0+dfsg-2
qemu-system-common 1.7.0+dfsg-2
qemu-system-mips 1.7.0+dfsg-2
qemu-system-misc 1.7.0+dfsg-2
qemu-system-ppc 1.7.0+dfsg-2
qemu-system-sparc 1.7.0+dfsg-2
qemu-system-x86 1.7.0+dfsg-2
qemu-user 1.7.0+dfsg-2
qemu-utils 1.7.0+dfsg-2
libvirt-bin 1.1.4-2
libvirt0 1.1.4-2
libvirtodbc0 6.1.6+dfsg-4
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