[Bug 1524069] Re: [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]

[Mike Pontillo]

On my Trusty VM with "[x] Copy host CPU configuration" checked in virt-
manager, running 'sudo modprobe -r raid6_pq && sudo modprobe raid6_pq'
is enough to reproduce the kernel exception in dmesg (though I didn't
see it print "Segmentation Fault", so that may be somewhat of a red
herring).

Here's /proc/cpuinfo on the guest:
http://paste.ubuntu.com/13868715/

And here's /proc/cpuinfo on the hypervisor host:
http://paste.ubuntu.com/13868744/

I have a separate issue (which I have not filed, because I haven't
triaged, and am not sure I can reproduce yet) that was blocking me from
creating a Xenial guest, but I can try again shortly.

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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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