Red Hat Bugzilla – Bug 1029539
Machine type rhel6.1.0 and balloon device cause migration fail from RHEL6.5 host to RHEL7.0 host
Last modified: 2014-06-17 23:41:55 EDT
Fix included in qemu-kvm-1.5.3-20.el7
Reproduced the issue on qemu-kvm-1.5.3-19.el7. Verified pass on qemu-kvm-1.5.3-21.el7. Steps: 1. Boot up a guest with balloon device with "-M rhel6.1.0" machine type on rhel6.5 host. /usr/libexec/qemu-kvm -cpu SandyBridge -M rhel6.1.0 -enable-kvm -m 4096 -smp 2,sockets=2,cores=1,threads=1 -name rhel7.0-64 -uuid 9a0e67ec-f286-d8e7-0548-0c1c9ec93009 -nodefconfig -nodefaults -monitor stdio -rtc base=utc,clock=host,driftfix=slew -no-kvm-pit-reinjection -no-shutdown -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x7 -device virtio-scsi-pci,id=scsi0,bus=pci.0,addr=0x4 -drive file=/mnt/rhel7.0-64-qzhang.qcow2,if=none,id=drive-disk0,format=qcow2,cache=none,id=disk0 -device virtio-blk-pci,bus=pci.0,addr=0x8,drive=drive-disk0,id=disk-0 -drive if=none,media=cdrom,id=drive-ide0-1-0,readonly=on,format=raw -device ide-drive,drive=drive-ide0-1-0,bus=ide.0,unit=1,id=scsi-cdrom -netdev tap,id=hostnet0,vhost=on -device virtio-net-pci,netdev=hostnet0,id=net0,mac=44:37:e6:5d:6b:11,bus=pci.0,addr=0x3 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -chardev socket,id=channel1,path=/tmp/helloworld1,server,nowait -device virtserialport,chardev=channel1,name=port1,bus=virtio-serial0.0,id=port1 -chardev socket,id=channel2,path=/tmp/helloworld2,server,nowait -device virtserialport,chardev=channel2,name=port2,bus=virtio-serial0.0,id=port2 -device usb-tablet,id=input0 -vnc :10 -vga std -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x6 -drive if=none,id=drive-fdc0-0-0,format=raw,cache=none -global isa-fdc.driveA=drive-fdc0-0-0 -qmp tcp:0:5555,server,nowait -global PIIX4_PM.disable_s3=0 -global PIIX4_PM.disable_s4=0 2. Boot up the guest on 7.0 host (destination host) with -incoming tcp:0:5800. 3. Migrate guest to 7.0 host with balloon device attached. Result: On destination host: (qemu) (qemu) qemu-kvm: Features 0x30000002 unsupported. Allowed features: 0x51000002 qemu: warning: error while loading state for instance 0x0 of device '0000:00:06.0/virtio-balloon' load of migration failed Verified this bug on qemu-kvm-1.5.3-21.el7 with balloon device attached with all the following machine types: -M rhel6.0.0/rhel6.1.0/rhel6.2.0/rhel6.3.0/rhel6.4.0/rhel6.5.0. Migration finishes successfully and destination qemu-kvm does not quit. Balloon guest memory to a smaller value, it works. So this bug is fixed.
This request was resolved in Red Hat Enterprise Linux 7.0. Contact your manager or support representative in case you have further questions about the request.