3.10-rc1 guest kernel panic : known issue ?

Hello,

On a Westmere EX system I tried to boot a 3.10-rc1 kernel in the guest and tripped over a panic.
[ 'was only able to capture part of the info. on the guest console... Pl. see the JPG file and also the qemu command line below. ]

'am using qemu (from qemu.git 1.4.91) that is about a day old. This worked fine with 3.9-rc7 kernels in the guest.

I had also tried smaller guests with and without VFIO and huge pages etc...and got the same panic. Is this a known issue [or an operator error on my part] ?

Thanks
Vinod

/usr/local/bin/qemu-system-x86_64 \
-enable-kvm \
-cpu host \
-name vm1 \
-smp sockets=8,cores=10,threads=1 \
-numa node,nodeid=0,cpus=0-9,mem=96g \
-numa node,nodeid=1,cpus=10-19,mem=96g \
-numa node,nodeid=2,cpus=20-29,mem=96g \
-numa node,nodeid=3,cpus=30-39,mem=96g \
-numa node,nodeid=4,cpus=40-49,mem=96g \
-numa node,nodeid=5,cpus=50-59,mem=96g \
-numa node,nodeid=6,cpus=60-69,mem=96g \
-numa node,nodeid=7,cpus=70-79,mem=96g \
-m 786432 \
-mem-path /dev/hugepages \
-chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/vm1.monitor,server,nowait \
-drive file=/dev/libvirt_lvm3/vm1,if=none,id=drive-virtio-disk0,format=raw,cache=none,aio=native \
-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 \
-monitor stdio \
-net nic,model=virtio,macaddr=52:54:00:71:01:01,netdev=nic-0 \
-netdev tap,id=nic-0,ifname=tap0,script=no,downscript=no,vhost=on \
-device vfio-pci,host=05:00.0,id=hostdev0 \
-device vfio-pci,host=05:00.1,id=hostdev1 \
-vnc :4