4.2.2 pci-passthrough crashes Dell Poweredge R710

[Alexander Bienzeisler]

Hello everyone,

i just updated from 4.2.1 to 4.2.2. If i try to fire up my win2k8 domU
with a pci device attached, the dom0 machine hardcrashes.

my system log (idrac) shows the following:

CPU 2 has an internal error (IERR).
A bus fatal error was detected on a component at bus 0 device 0 function 0.
CPU 1 machine check detected.

and plenty of other entries. The machine hardresets then.
If i leave the faulty machine down after a reboot, nothing like this
happens.

host : susi-0
release : 3.8.2-ipmi
version : #4 SMP Mon Mar 11 12:54:31 CET 2013
machine : x86_64
nr_cpus : 12
max_cpu_id : 31
nr_nodes : 2
cores_per_socket : 6
threads_per_core : 1
cpu_mhz : 3325
bfebfbff:2c100800:00000000:00003f40:029ee3ff:00000000:00000001:00000000
virt_caps : hvm
total_memory : 98291
free_memory : 62390
sharing_freed_memory : 0
sharing_used_memory : 0
free_cpus : 0
xen_major : 4
xen_minor : 2
xen_extra : .2
xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32
hvm-3.0-x86_32p hvm-3.0-x86_64
xen_scheduler : credit
xen_pagesize : 4096
platform_params : virt_start=0xffff800000000000
xen_changeset : unavailable
xen_commandline : placeholder loglvl=all dom0_mem=2048M
dom0_max_vcpus=2 com2=115200 console=com2,vga
cc_compiler : gcc (Debian 4.4.5-8) 4.4.5
cc_compile_by : root
cc_compile_domain : wsk.tu-chemnitz.de
cc_compile_date : Tue May 14 09:16:43 CEST 2013
xend_config_format : 4

[Jan Beulich]

Post by Alexander Bienzeisler
i just updated from 4.2.1 to 4.2.2. If i try to fire up my win2k8 domU
with a pci device attached, the dom0 machine hardcrashes.
CPU 2 has an internal error (IERR).
A bus fatal error was detected on a component at bus 0 device 0 function 0.
CPU 1 machine check detected.

Machine checks and CPU internal errors aren't normally caused by
software, but in most cases point at faulty hardware. In any case,
if you're suspecting Xen, you'd need to provide full logs (hypervisor
and kernel) covering the crash, with suitable debugging options
enabled.

Jan