[CentOS] Panic with EL7 KVM guest on EL6 host on AMD server with latest kernel

Johnny Hughes johnny at centos.org
Tue Jul 17 21:48:09 UTC 2018

On 07/17/2018 02:00 AM, Simon Matter wrote:
>> Hi,
>> I have AMD servers running CentOS 6.10 as KVM host and on it guests
>> running CentOS 7.5.
>> Since the latest kernel update on CentOS 6.10,
>> kernel-2.6.32-754.2.1.el6.x86_64, I can't boot the CentOS 7.5 guests with
>> kernel-3.10.0-862.6.3.el7.x86_64 anymore.
>> Reverting CentOS 6.10 host to kernel-2.6.32-754.el6.x86_64 fixes the
>> problem.
>> Screendump of the panic is attached, not very helpful I guess.
> I didn't know attachments are stripped by the list.
> Here is the bugreport:
> https://bugs.centos.org/view.php?id=15067
> My feeling is that the recent Intel fixes/workarounds have broken it here
> for AMD systems :(

I had to set my CPU type to opteron_g3 instead of opteron_g5 for some
machines on an AMD server.

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