I see two recent hits we have still logs for. The one described in comment #10
And another but there the error message is a bit different: on the migration source host: : https://6f0be18d925d64906a23-689ad0b9b6f06bc0c51bfb99bf86ea04.ssl.cf5.rackcdn.com/698706/4/check/nova-grenade-multinode/ee2dbea/logs/libvirt/qemu/instance-0000001b.txt char device redirected to /dev/pts/0 (label charserial0) virtio: zero sized buffers are not allowed 2020-11-23 22:20:54.297+0000: initiating migration on the migration destination https://6f0be18d925d64906a23-689ad0b9b6f06bc0c51bfb99bf86ea04.ssl.cf5.rackcdn.com/698706/4/check/nova-grenade-multinode/ee2dbea/logs/subnode-2/libvirt/qemu/instance-0000001b.txt char device redirected to /dev/pts/0 (label charserial0) 2020-11-23T22:20:55.129189Z qemu-system-x86_64: VQ 0 size 0x80 Guest index 0x62 inconsistent with Host index 0xa1: delta 0xffc1 2020-11-23T22:20:55.129230Z qemu-system-x86_64: Failed to load virtio-blk:virtio 2020-11-23T22:20:55.129241Z qemu-system-x86_64: error while loading state for instance 0x0 of device '0000:00:03.0/virtio-blk' 2020-11-23T22:20:55.129259Z qemu-system-x86_64: load of migration failed: Operation not permitted -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1761798 Title: live migration intermittently fails in CI with "VQ 0 size 0x80 Guest index 0x12c inconsistent with Host index 0x134: delta 0xfff8" Status in OpenStack Compute (nova): Confirmed Status in QEMU: New Bug description: Seen here: http://logs.openstack.org/37/522537/20/check/legacy-tempest-dsvm- multinode-live- migration/8de6e74/logs/subnode-2/libvirt/qemu/instance-00000002.txt.gz 2018-04-05T21:48:38.205752Z qemu-system-x86_64: -chardev pty,id=charserial0,logfile=/dev/fdset/1,logappend=on: char device redirected to /dev/pts/0 (label charserial0) warning: TCG doesn't support requested feature: CPUID.01H:ECX.vmx [bit 5] 2018-04-05T21:48:43.153268Z qemu-system-x86_64: VQ 0 size 0x80 Guest index 0x12c inconsistent with Host index 0x134: delta 0xfff8 2018-04-05T21:48:43.153288Z qemu-system-x86_64: Failed to load virtio-blk:virtio 2018-04-05T21:48:43.153292Z qemu-system-x86_64: error while loading state for instance 0x0 of device '0000:00:04.0/virtio-blk' 2018-04-05T21:48:43.153347Z qemu-system-x86_64: load of migration failed: Operation not permitted 2018-04-05 21:48:43.198+0000: shutting down, reason=crashed And in the n-cpu logs on the other host: http://logs.openstack.org/37/522537/20/check/legacy-tempest-dsvm- multinode-live- migration/8de6e74/logs/screen-n-cpu.txt.gz#_Apr_05_21_48_43_257541 There is a related Red Hat bug: https://bugzilla.redhat.com/show_bug.cgi?id=1450524 The CI job failures are at present using the Pike UCA: ii libvirt-bin 3.6.0-1ubuntu6.2~cloud0 ii qemu-system-x86 1:2.10+dfsg-0ubuntu3.5~cloud0 To manage notifications about this bug go to: https://bugs.launchpad.net/nova/+bug/1761798/+subscriptions
