------- Comment From xxd...@de.ibm.com 2018-07-30 10:24 EDT------- The host (KVM hypervisor) is 16.04. So you suggest to install newer UCA qemu on the hypervisors. That is something I have to decline today. Those hosts are runnung some more VMs. So to update the hypervisors I need a service window aggreed with my customers. And I have to stay on a kind of supported mainstream level, no experimental stuff. Until then I can do some tests with some guest VMs. Or someone other has a test environment where he/she can play also with the hypervisors. As I mentioned: the problem is reproducible !
---------- So now I did another test with a 16.04 guest. The problem gets worse, but maybe it helps in catching the bug. I did a new installation of a VM with Ubuntu 16.04.5 LTS, kernel 4.4.0-131-generic #157-Ubuntu SMP. Live migration succeeded. Then I installed linux-generic-hwe-16.04. The system booted with kernel 4.15.0-29-generic #31~16.04.1-Ubuntu SMP. And live migration failed: # virsh migrate --persistent --live p8lnxtst1 qemu+ssh://pkvm1/system error: internal error: early end of file from monitor, possible problem: 2018-07-30T14:13:34.381447Z qemu-system-ppc64: VQ 0 size 0x100 Guest index 0x302 inconsistent with Host index 0x16c: delta 0x196 2018-07-30T14:13:34.381496Z qemu-system-ppc64: error while loading state for instance 0x0 of device 'pci@800000020000000:01.0/virtio-net' 2018-07-30T14:13:34.381806Z qemu-system-ppc64: load of migration failed: Operation not permitted It is still very reproducible! This means the new hwe kernel introduced the problem !!! Or it is just not compatible with 4.4.0-130-generic of the KVM hypervisor. BTW, no entry in the /var/log/libvirt/qemu log files regarding the migration attempts. Any other log or trace files I could look for or activate? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1783140 Title: KVM live migration fails Status in The Ubuntu-power-systems project: New Status in linux package in Ubuntu: New Status in qemu package in Ubuntu: Incomplete Bug description: Environment: 2 POWER8 with Ubuntu 16.04.4 LTS as KVM hypervisor. 1 KVM guest with Ubuntu 18.04 LTS. Virtual disk for the guest is a qcow2 file on an NFS share, accessible from both hypervisors, so live migration is possible and works for all other guests (SLES, RHEL, Ubunutu 16.04), Live migratino of Ubuntu 18.04 guest fails on ppc, while the same test on an x86_64 environment suceeds. root@pkvm2:~# virsh migrate --persistent --live p8lnxtst4 qemu+ssh://pkvm1/system error: internal error: early end of file from monitor, possible problem: 2018-07-23T11:12:25.586385Z qemu-system-ppc64: VQ 0 size 0x100 Guest index 0x38aa inconsistent with Host index 0xa980: delta 0x8f2a 2018-07-23T11:12:25.586434Z qemu-system-ppc64: error while loading state for instance 0x0 of device 'pci@800000020000000:01.0/virtio-net' 2018-07-23T11:12:25.587246Z qemu-system-ppc64: load of migration failed: Operation not permitted root@pkvm2:~# uname -a Linux pkvm2 4.4.0-130-generic #156-Ubuntu SMP Thu Jun 14 08:51:21 UTC 2018 ppc64le ppc64le ppc64le GNU/Linux To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1783140/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
