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

[Brett Milford]

I'm getting the same:

2020-06-05T13:00:38.579356Z qemu-system-x86_64: get_pci_config_device: Bad config data: i=0x10 read: a1 device: 1 cmask: ff wmask: c0 w1cmask:0
      2020-06-05T13:00:38.579375Z qemu-system-x86_64: Failed to load PCIDevice:config
      2020-06-05T13:00:38.579379Z qemu-system-x86_64: Failed to load virtio-balloon:virtio
      2020-06-05T13:00:38.579382Z qemu-system-x86_64: error while loading state for instance 0x0 of device '0000:00:05.0/virtio-balloon'
      2020-06-05T13:00:38.579434Z qemu-system-x86_64: warning: TSC frequency mismatch between VM (2399983 kHz) and host (2399997 kHz), and TSC scaling unavailable
      2020-06-05T13:00:38.579562Z qemu-system-x86_64: warning: TSC frequency mismatch between VM (2399983 kHz) and host (2399997 kHz), and TSC scaling unavailable
      2020-06-05T13:00:38.579707Z qemu-system-x86_64: load of migration failed: Invalid argument

Migrating from:
qemu-system-x86                       1:3.1+dfsg-2ubuntu3.2~cloud0

To:
qemu-system-x86                        1:3.1+dfsg-2ubuntu3.7~cloud0

** Tags added: sts

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https://bugs.launchpad.net/bugs/1882416

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

Status in Ubuntu Cloud Archive:
  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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