Hi! I'm running into an issue with migrating VMs from machine A to machine B (although migration works from B to A). The issue is that once the migration is complete and the VM is given the go-ahead to continue execution, it spontaneously reboots. With the version of qemu-kvm shipped with Ubuntu 12.04 (qemu 1.0), it would freeze in BIOS. With qemu 1.4.1, it makes it through POST and restarts the operating system. So far I have been testing with Linux virtuals: two Ubuntu 12.04 images. Migration consistently works perfectly from host B to host A, but any migration (whether it be a clean boot-then-migrate, or a migrate-back) from A to B experiences the above symptoms. I have toyed with many options, but the behavior remains consistent. Host A: AMD Opteron 6272 QEMU v1.4.0-58-g57105f7 Kernel 3.8.12 (custom built) Host B: AMD Opteron 6172 (note - this is an older processor than what Host A currently sports) QEMU v1.4.0-58-g57105f7 Kernel 3.8.12 (custom built) Virtual Info: Ubuntu 12.04, kernel 3.2, 64-bit Problem remains regardless of -no-kvm-irqchip switch. Problem seems to go away when NOT using the -enable-kvm switch. Command-line: LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin QEMU_AUDIO_DRV=none /usr/bin/qemu-system-x86_64 \ -S -sdl -qmp tcp:localhost:4444,server --monitor stdio \ -M pc-0.14 \ -m 4096 \ -enable-kvm \ -smp 1,sockets=1,cores=1,threads=1 -no-kvm-pit \ -name qb.team \ -uuid e8a71bd3-1b72-ce09-b8b1-97bed859d534 \ -nodefaults \ -rtc base=utc \ -no-shutdown \ -boot cd \ -drive file=/opt/store3/vm/qb.team/qb.team_root.qcow2,if=none,id=drive-virtio-disk0,format=qcow2 \ -device virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0 \ -drive if=none,media=cdrom,id=drive-ide0-0-0,readonly=on,format=raw \ -device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 \ -netdev tap,id=hostnet0 \ -device rtl8139,netdev=hostnet0,id=net0,mac=00:00:00:00:00:00 \ -usb \ -vga cirrus \ -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 Thanks for your help! -- Matthew -- CONFIDENTIAL NOTICE: The information contained in this electronic message is legally privileged, confidential and exempt from disclosure under applicable law. It is intended only for the use of the individual or entity named above. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this message is strictly prohibited. If you have received this communication in error, please notify the sender immediately by return e-mail and delete the original message and any copies of it from your computer system. Thank you. EXPORT CONTROL WARNING: This document may contain technical data that is subject to the International Traffic in Arms Regulations (ITAR) controls and may not be exported or otherwise disclosed to any foreign person or firm, whether in the US or abroad, without first complying with all requirements of the ITAR, 22 CFR 120-130, including the requirement for obtaining an export license if applicable. In addition, this document may contain technology that is subject to the Export Administration Regulations (EAR) and may not be exported or otherwise disclosed to any non-U.S. person, whether in the US or abroad, without first complying with all requirements of the EAR, 15 CFR 730-774, including the requirement for obtaining an export license if applicable. Violation of these export laws is subject to severe criminal penalties.
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