Just to make bug description a bit more precise -- qemu doesn't require '-mcpu' to run. Right now our virtual machines work fine without it [1]. We may need to fix this issue because we want to pass cpu_mode=host-passthrough to nova. This flag tells nova/libvirt forces nova to see which cpu model is available on host and use the same for the guest. And with this flag libvirt crashes the way Ming posted. Important fact is that this functionality is not available in libvirt for both arm32 (!) and arm64. We may want to continue to use cpu_mode=none then. We need to discuss it more next week.
1: /usr/local/bin/qemu-system-aarch64 -name instance-00000117 -S -machine virt,accel=kvm,usb=off -m 2000 -realtime mlock=off -smp 1,sockets=1,cores=1,threads=1 -cpu host -uuid 60468654-eaf4-423f-a823-296cb0f30342 -nographic -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/instance-00000117.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc,driftfix=slew -no-shutdown -kernel /var/lib/nova/instances/60468654-eaf4-423f-a823-296cb0f30342/kernel -append root=/dev/vda console=tty0 console=ttyS0 console=ttyAMA0 rw -usb -drive file=/var/lib/nova/instances/60468654-eaf4-423f-a823-296cb0f30342/disk,if=none,id=drive-virtio-disk0,format=qcow2,cache=none -device virtio-blk-device,scsi=off,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -netdev tap,fd=22,id=hostnet0 -device virtio-net-device,netdev=hostnet0,id=net0,mac=fa:16:3e:29:c0:f9 -serial file:/var/lib/nova/instances/60468654-eaf4-423f-a823-296cb0f30342/console.log -ser ial pty -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1266677 Title: Doesn't parse cpu model for arm64 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1266677/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
