Comment 10 for bug 1894772

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Christian Ehrhardt  (paelzer) wrote : Re: [Bug 1894772] Re: live migration of windows 2012 r2 instance with virtio balloon driver fails from mitaka to queens.

On Wed, Sep 9, 2020 at 3:20 AM Seyeong Kim <email address hidden> wrote:
...
> but Q -> U has issue below.
>
> error: internal error: qemu unexpectedly closed the monitor: qemu-system-x86_64: -realtime mlock=off: warning: '-realtime mlock=...' is deprecated, please use '-overcommit mem-lock=...' instead
> 2020-09-09T00:56:27.768574Z qemu-system-x86_64: can't apply global SandyBridge-IBRS-x86_64-cpu.osxsave=off: Property '.osxsave' not found

It seems you found a new combination to trigger bug 1825195 :-/
We fixed it where we could covering the Ubuntu releases.

The fixes for that are upstream since >=libvirt-5.4 and I think ussuri
should have that - right?
Could you check the version of libvirt on the U system and the
commandline it started qemu with?
It seems it added an osxsave attribute there which it shouldn't.

On Wed, Sep 9, 2020 at 7:05 AM Seyeong Kim <email address hidden> wrote:

> Sep 9 04:50:53 colt libvirtd[1311]: 2020-09-09 04:50:53.224+0000: 1311: error : qemuMonitorIO:719 : internal error: End of file from qemu monitor

This just means qemu went away and is not concerning on its own.

Gladly for the actual case here this isn't related to your
virtio-balloon changes ...