kvm-63: Windows Server 2003 randomly hangs with 100% CPU

[Felix Leimbach <felix.leimbach@gmx.net>]

Hello list,

I encountered two Windows Server 2003 Std SP1 guests which would 
randomly hang with 100% CPU after several hours of normal operation.
The guest would not respond at all, not even to ping requests. Its 
process on the host uses 100% CPU.

The Host:
Dual-Core AMD Opteron(tm) Processor 2212
10GB DDRII RAM
Linux 2.6.24.3
KVM-63 userspace
Other KVM guests (Linux and Windows Vista) are rock-solid

The two problematic guests:
Imaged from VMWare ESX 2.5 with reinstall of the ACPI Uniprocessor HAL 
and drivers.
Switching to the Standard PC HAL and using -no-acpi does not help.
Tried with the new virtio NIC first and changed to ne2k_pci later but no 
effect.
One guest uses a raw hard disk image the other qcow2.

The guests are launched with this command-line:
kvm -hda bonus-system.qcow2 -m 1024 -net 
nic,model=ne2k_pci,macaddr=52:54:00:74:A1:0C -net tap,ifname=vm-bonus 
-vnc 10.73.250.1:2 -k de -monitor tcp:10.73.250.1:5952,server,nowait 
-localtime

Currently I'm testing with a fresh install of Win2003 STD SP1 to rule 
out the imaged-from-ESX factor.
Also I'm running one of the machines with -no-kvm now and will report 
back how that works out.

Any idea how to go about debugging this?

Also I see interesting syslog entries. But they don't seem directly 
related to the hangs, as the times do not match.
Mar 27 14:30:26 kernsrc@obelix kvm: 1363: cpu0 kvm_set_msr_common: 
MSR_IA32_MC0_STATUS 0x0, nop
Mar 27 15:46:52 kernsrc@obelix Ignoring de-assert INIT to vcpu 0
Mar 27 17:20:45 kernsrc@obelix Ignoring de-assert INIT to vcpu 0
Mar 27 17:37:30 kernsrc@obelix apic write: bad size=1 fee00030
Mar 27 17:37:30 kernsrc@obelix Ignoring de-assert INIT to vcpu 0
Mar 27 17:42:19 kernsrc@obelix apic write: bad size=1 fee00030
Mar 27 17:42:19 kernsrc@obelix Ignoring de-assert INIT to vcpu 0
Mar 27 17:55:34 kernsrc@obelix apic write: bad size=1 fee00030
Mar 27 17:55:34 kernsrc@obelix Ignoring de-assert INIT to vcpu 0
Mar 27 20:13:14 kernsrc@obelix apic write: bad size=1 fee00030
Mar 27 20:13:14 kernsrc@obelix Ignoring de-assert INIT to vcpu 0

Cheers,
FL

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