Bug#611832: linux-image-2.6.32-5-amd64: general protection fault at reboot under qemu: native_stop_other_cpus+0x86/0x90

[Timo Juhani Lindfors <timo.lindfors@iki.fi>]

Ben Hutchings <ben@decadent.org.uk> writes:
> Which version of qemu are you using in the host?  If you are using
> kvm-qemu, which kernel version are you using in the host?

The host is a xen domU:

lindi1:~$ qemu-system-x86_64 --version
QEMU PC emulator version 0.12.5 (Debian 0.12.5+dfsg-3), Copyright (c) 2003-2008 Fabrice Bellard
lindi1:~$ dpkg-query -W qemu
qemu    0.12.5+dfsg-3
lindi1:~$ dmesg|head -n3
[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Linux version 2.6.32-5-amd64 (Debian 2.6.32-30) (ben@decadent.org.uk) (gcc version 4.3.5 (Debian 4.3.5-4) ) #1 SMP Wed Jan 12 03:40:32 UTC 2011

>> 0x0000000000600889 <f+41>:       57     push   %rdi
>> 0x000000000060088a <f+42>:       9d     popfq
>> 0x000000000060088b <f+43>:       66 66 90       xchg   %ax,%ax
>> 0x000000000060088e <f+46>:       66 90  xchg   %ax,%ax
>
> This looks like deliberate patching by the PV-alternatives mechanism.

Is this PV-alternatives a linux or qemu feature or are they both
cooperating?

I tried to look around but couldn't find the code yet.