@Serge, A workaround for me is to use "hypervisor default" in virt-
manager. I'm not sure what the equivalent is in virt-install, but maybe
using --cpu=host-model-only would be a workaround?
>From the man page:
Expose the host CPUs configuration to the guest. This enables
the guest to take advantage of many
of the host CPUs features (better performance), but may cause
issues if migrating the guest to a
host without an identical CPU.
--cpu host-model-only
Expose the nearest host CPU model configuration to the guest.
It is the best CPU which can be
used for a guest on any of the hosts.
Use --cpu=? to see a list of all available sub options. Complete
details at
<http://libvirt.org/formatdomain.html#elementsCPU>
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https://bugs.launchpad.net/bugs/1524069
Title:
[Xenial] KVM trusty guest 3.13.0-68 raid6-pq panic in
raid6_avx21_gen_syndrome() while probing grub devices [was: Xenial
KVM: updating Trusty guest from 3.13.0-68 to 3.13.0-71 causes kernel
exception]
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