I am seeing the same issue on some of my OpenStack compute nodes, interestingly those which seem to have a newer CPU than others.
Affected CPU: Intel(R) Xeon(R) CPU E5-1650 v3 @ 3.50GHz Mapped in guest to: Intel Core i7 9xx (Nehalem Class Core i7) Unaffected Host CPU: Intel(R) Xeon(R) CPU E5-2660 0 @ 2.20GHz Mapped in guest to: Intel Xeon E312xx (Sandy Bridge) Booting a Xenial guest on the affected host crashes during boot, see http://paste.ubuntu.com/15204908/. A Wily guest runs fine at first, but generates a similar traceback as soon as I modprobe raid6_pq. Both hosts are running nova-compute from Wily. Please let me know if you need any further details. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. 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] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1524069/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
