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[Qemu-devel] [Bug 1838569] Re: virtio-balloon change breaks post 4.0 upg


From: Christian Ehrhardt 
Subject: [Qemu-devel] [Bug 1838569] Re: virtio-balloon change breaks post 4.0 upgrade
Date: Wed, 07 Aug 2019 10:44:13 -0000

In regard to "similar bugs" it sounds more like [1] to me.
Which was around needing [2].

But just like the commit David mentioned is in 2.8 this one is in since
2.6 (and backported).

[1]: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1647389
[2]: 
https://git.qemu.org/?p=qemu.git;a=commit;h=4eae2a657d1ff5ada56eb9b4966eae0eff333b0b

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https://bugs.launchpad.net/bugs/1838569

Title:
  virtio-balloon change breaks post 4.0 upgrade

Status in QEMU:
  New
Status in qemu package in Ubuntu:
  New

Bug description:
  We upgraded the libvirt UCA packages from 3.6 to 4.0 and qemu 2.10 to 2.11  
as part of a queens upgrade and noticed that
  virtio-ballon is broken when instances live migrate (started with a prior 3.6 
version)  with:

  2019-07-24T06:46:49.487109Z qemu-system-x86_64: warning: Unknown firmware 
file in legacy mode: etc/msr_feature_control
  2019-07-24T06:47:22.187749Z qemu-system-x86_64: VQ 2 size 0x80 < 
last_avail_idx 0xb57 - used_idx 0xb59
  2019-07-24T06:47:22.187768Z qemu-system-x86_64: Failed to load 
virtio-balloon:virtio
  2019-07-24T06:47:22.187771Z qemu-system-x86_64: error while loading state for 
instance 0x0 of device '0000:00:05.0/virtio-balloon'
  2019-07-24T06:47:22.188194Z qemu-system-x86_64: load of migration failed: 
Operation not permitted
  2019-07-24 06:47:22.430+0000: shutting down, reason=failed

  This seem to be the exact problem as reported by
  https://lists.gnu.org/archive/html/qemu-devel/2019-07/msg02228.html

  Listed the packages which changed:

  Start-Date: 2019-07-06  06:40:55
  Commandline: /usr/bin/apt-get -y -o Dpkg::Options::=--force-confdef -o 
Dpkg::Options::=--force-confold install libvirt-bin python-libvirt qemu 
qemu-utils qemu-system qemu-system-arm qemu-system-mips qemu-system-ppc 
qemu-system-sparc qemu-system-x86 qemu-system-misc qemu-block-extra qemu-utils 
qemu-user qemu-kvm
  Install: librdmacm1:amd64 (17.1-1ubuntu0.1~cloud0, automatic), 
libvirt-daemon-driver-storage-rbd:amd64 (4.0.0-1ubuntu8.10~cloud0, automatic), 
ipxe-qemu-256k-compat-efi-roms:amd64 
(1.0.0+git-20150424.a25a16d-0ubuntu2~cloud0, automatic)
  Upgrade: qemu-system-mips:amd64 (1:2.10+dfsg-0ubuntu3.8~cloud1, 
1:2.11+dfsg-1ubuntu7.13~cloud0), qemu-system-misc:amd64 
(1:2.10+dfsg-0ubuntu3.8~cloud1, 1:2.11+dfsg-1ubuntu7.13~cloud0), 
qemu-system-ppc:amd64 (1:2.10+dfsg-0ubuntu3.8~cloud1, 
1:2.11+dfsg-1ubuntu7.13~cloud0), python-libvirt:amd64 (3.5.0-1build1~cloud0, 
4.0.0-1~cloud0), qemu-system-x86:amd64 (1:2.10+dfsg-0ubuntu3.8~cloud1, 
1:2.11+dfsg-1ubuntu7.13~cloud0), libvirt-clients:amd64 
(3.6.0-1ubuntu6.8~cloud0, 4.0.0-1ubuntu8.10~cloud0), qemu-user:amd64 
(1:2.10+dfsg-0ubuntu3.8~cloud1, 1:2.11+dfsg-1ubuntu7.13~cloud0), 
libvirt-bin:amd64 (3.6.0-1ubuntu6.8~cloud0, 4.0.0-1ubuntu8.10~cloud0), 
qemu:amd64 (1:2.10+dfsg-0ubuntu3.8~cloud1, 1:2.11+dfsg-1ubuntu7.13~cloud0), 
qemu-utils:amd64 (1:2.10+dfsg-0ubuntu3.8~cloud1, 
1:2.11+dfsg-1ubuntu7.13~cloud0), libvirt-daemon-system:amd64 
(3.6.0-1ubuntu6.8~cloud0, 4.0.0-1ubuntu8.10~cloud0), qemu-system-sparc:amd64 
(1:2.10+dfsg-0ubuntu3.8~cloud1, 1:2.11+dfsg-1ubuntu7.13~cloud0), 
qemu-user-binfmt:amd64 (1:2.10+dfsg-0ubuntu3.8~cloud1, 
1:2.11+dfsg-1ubuntu7.13~cloud0), qemu-kvm:amd64 (1:2.10+dfsg-0ubuntu3.8~cloud1, 
1:2.11+dfsg-1ubuntu7.13~cloud0), libvirt0:amd64 (3.6.0-1ubuntu6.8~cloud0, 
4.0.0-1ubuntu8.10~cloud0), qemu-system-arm:amd64 
(1:2.10+dfsg-0ubuntu3.8~cloud1, 1:2.11+dfsg-1ubuntu7.13~cloud0), 
qemu-block-extra:amd64 (1:2.10+dfsg-0ubuntu3.8~cloud1, 
1:2.11+dfsg-1ubuntu7.13~cloud0), qemu-system-common:amd64 
(1:2.10+dfsg-0ubuntu3.8~cloud1, 1:2.11+dfsg-1ubuntu7.13~cloud0), 
qemu-system:amd64 (1:2.10+dfsg-0ubuntu3.8~cloud1, 
1:2.11+dfsg-1ubuntu7.13~cloud0), libvirt-daemon:amd64 (3.6.0-1ubuntu6.8~cloud0, 
4.0.0-1ubuntu8.10~cloud0)
  End-Date: 2019-07-06  06:41:08

  At this point the instances would have to be hard rebooted or
  stopped/started to fix the issue for future live migration attemps

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