dom0 hang on Win2K3 domU reboot

[Joel CARNAT <joel%carnat.net@localhost>]

Hi,

I'm running 4.99.49/i386 with xen 3.1.2 kernel.
When my Win2K3 domU wants to reboot, the whole dom0 freezes.
As I was in X when domU rebooted I couldn't see the error.
So I ran "xm reboot whistler" from the console and the message was:
####################
uvm_fault(0xd0d67dd0, 0, 1) -> 0xe
kernel: supervisor trap page fault, code=0
Stopped in pid 26804.1 (ls) at netbsd: turnstile_block+0x411: movl 0x10(%eax), 
%eax
####################

My dom0 is 4.99.49 GENERIC (plus wpi* enabled).
Attached is the domU conifguration file.

Any ideas ?
TIA,
        Jo

name = "whistler"

kernel = "/usr/pkg/lib/xen/boot/hvmloader"
builder = 'hvm'

memory = 256

#disk = [ 'file:/home/xen/whistler/disk,ioemu:hda,w' ]
disk = [ 'file:/home/xen/whistler/disk,ioemu:hda,w', 
'file:/home/xen/whistler/Win2K3_R2_STD-disk_1.iso,ioemu:hdc:cdrom,r' ]
#vif = [ 'mac=00:16:3e:00:00:3f, bridge=bridge0' ]
vif = [ 'mac=00:16:3e:00:00:3f, bridge=bridge0, type=ioemu' ]
device_model = '/usr/pkg/libexec/qemu-dm'

#boot='d'

#sdl = 1
#vnc = 0
sdl = 0
vnc = 1
vncdisplay = 0
vncunused = 0
vncpasswd=""
vnclisten='127.0.0.1'

usb=1
usbdevice='tablet'

#root = "/dev/wd0d"

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