[Bug 1515145] [NEW] xm migrate --live panics hypervisor

[Volker]

Public bug reported:

I have to HP Proliant D380 Gen8 Servers with a shared iSCSI storage in a
xen cluster configuration. They run 12.04 amd64 and are fully patched
and freshly rebooted.

When i call
 /usr/sbin/xm migrate --live <some-domain-id> <ip-over-other-host>
on one server this "sending" system reboots instantly and the VM only appears in an undefined state on the "receiving" host.

After redirecting the console output of the hypervisor to com1 i was
able to retrieve this error message:

(XEN) [2015-11-11 07:50:05] traps.c:3073: GPF (0000): ffff82c48017fa31 -> ffff82c4802070d8
(XEN) [2015-11-11 07:50:15] 
(XEN) [2015-11-11 07:50:15] ****************************************
(XEN) [2015-11-11 07:50:15] Panic on CPU 10:
(XEN) [2015-11-11 07:50:15] mm lock held by sh_page_fault__guest_4
(XEN) [2015-11-11 07:50:15] ****************************************
(XEN) [2015-11-11 07:50:15] 
(XEN) [2015-11-11 07:50:15] Manual reset required ('noreboot' specified)

After replacing "/boot/xen-4.1-amd64.gz" with the file from debian
wheezy package "xen-hypervisor-4.1-amd64_4.1.4-3+deb7u9_amd64.deb" the
problem is gone.

** Affects: xen (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "hypervisor-ubuntu.txt"
   https://bugs.launchpad.net/bugs/1515145/+attachment/4516743/+files/hypervisor-ubuntu.txt

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https://bugs.launchpad.net/bugs/1515145

Title:
  xm migrate --live panics hypervisor

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