[Bug 1882416] Re: virtio-balloon change breaks rocky -> stein live migrate

[Brett Milford]

from paelzer https://bugs.launchpad.net/cloud-
archive/+bug/1848497/comments/15

BTW 2.11 -> 3.1 without the cloud archive in mind matches a migration from Bionic to Disco.
I have checked my test logs (a bit ago since Disco itself is EOL).
But at least this January 13 and 16th the migrations 2.11 -> 3.1 still were ok.

In my log that was between
B: qemu: 1:2.11+dfsg-1ubuntu7.21 libvirt: 4.0.0-1ubuntu8.14
D: qemu: 1:3.1+dfsg-2ubuntu3.7 libvirt: 5.0.0-1ubuntu2.6

  7.2.0 (11:51:19): Test live migration (extra option '') of a bionic guest testkvm-bionic-from/testkvm-disco-from
    7.2.1 (11:51:19): live migration (extra option '') testkvm-bionic-from -> testkvm-disco-from => Pass
    7.2.2 (11:51:26): Check if guest kvmguest-bionic-normal on testkvm-disco-from is alive => Pass

** Also affects: qemu (Ubuntu)
   Importance: Undecided
       Status: New

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Title:
  virtio-balloon change breaks rocky -> stein live migrate

Status in Ubuntu Cloud Archive:
  New
Status in qemu package in Ubuntu:
  New

Bug description:
  Live migrating a VM from a rocky env -> stein env doesn't work

  Source host (openstack rocky release):
  qemu-system-x86:
    Installed: 1:2.11+dfsg-1ubuntu7.26

  Destination host (openstack stein release):
  qemu-system-x86:
    Installed: 1:3.1+dfsg-2ubuntu3.7~cloud0

  Live Migration failure: internal error: qemu unexpectedly closed the monitor: 2020-05-24T22:47:19.677896Z qemu-system-x86_64: get_pci_config_device: Bad config data: i=0x10 read: a1 device: 1 cmask: ff wmask: c0 w1cmask:0
  2020-05-24T22:47:19.677922Z qemu-system-x86_64: Failed to load PCIDevice:config
  2020-05-24T22:47:19.677926Z qemu-system-x86_64: Failed to load virtio-balloon:virtio
  2020-05-24T22:47:19.677929Z qemu-system-x86_64: error while loading state for instance 0x0 of device '0000:00:05.0/virtio-balloon'
  2020-05-24T22:47:19.678086Z qemu-system-x86_64: load of migration failed: Invalid argument: libvirt.libvirtError: internal error: qemu unexpectedly closed the monitor: 2020-05-24T22:47:19.677896Z qemu-system-x86_64: get_pci_config_device: Bad config data: i=0x10 read: a1 device: 1 cmask: ff wmask: c0 w1cmask:0'


  Please see https://bugs.launchpad.net/cloud-archive/+bug/1848497 for
  related issue

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