Hello to all:

Recently upgraded from CentOS 6.0 to 6.2 to get USB passthrough support by performing "yum update". USB passthrough works great, but now my Windows XP sp3 guest crashes repeatedly after a few minutes.

[root@shackleton-eth0 log]# rpm -qa|egrep '(kvm|kernel|libvirt-|qemu)'|sort abrt-addon-kerneloops-2.0.4-14.el6.centos.x86_64 dracut-kernel-004-256.el6_2.1.noarch gpxe-roms-qemu-0.9.7-6.9.el6.noarch kernel-2.6.32-220.7.1.el6.x86_64 kernel-2.6.32-71.el6.x86_64 kernel-devel-2.6.32-220.7.1.el6.x86_64 kernel-devel-2.6.32-71.el6.x86_64 kernel-firmware-2.6.32-220.7.1.el6.noarch kernel-headers-2.6.32-220.7.1.el6.x86_64 libreport-plugin-kerneloops-2.0.5-20.el6.x86_64 libvirt-0.9.4-23.el6_2.6.x86_64 libvirt-client-0.9.4-23.el6_2.6.x86_64 libvirt-python-0.9.4-23.el6_2.6.x86_64 qemu-img-0.12.1.2-2.209.el6_2.4.x86_64 qemu-kvm-0.12.1.2-2.209.el6_2.4.x86_64

This message in /var/log/messages precedes every crash:

[root@shackleton-eth0 log]# grep kvm /var/log/messages Mar 19 09:09:25 shackleton-eth0 kernel: kvm: 2889: cpu0 unhandled wrmsr: 0x198 data 0 Mar 19 09:15:48 shackleton-eth0 kernel: kvm: 2889: cpu0 unhandled wrmsr: 0x198 data 0 Mar 19 09:25:51 shackleton-eth0 kernel: kvm: 2889: cpu0 unhandled wrmsr: 0x198 data 0 Mar 19 11:21:27 shackleton-eth0 kernel: kvm: 2889: cpu0 unhandled wrmsr: 0x198 data 0 Mar 19 12:07:16 shackleton-eth0 kernel: kvm: 2889: cpu0 unhandled wrmsr: 0x198 data 0 Mar 19 12:16:14 shackleton-eth0 kernel: kvm: 2889: cpu0 unhandled wrmsr: 0x198 data 0 Mar 19 13:46:27 shackleton-eth0 kernel: kvm: 2889: cpu0 unhandled wrmsr: 0x198 data 0 Mar 19 14:06:49 shackleton-eth0 kernel: kvm: 2889: cpu0 unhandled wrmsr: 0x198 data 0

CentOS 6.0 was stable. Windows XP sp3 did not crash.

Formerly, I was running virtio-win-0.1-15.iso, but now upgraded to virtio-win-0.1-22.iso and Windows XP sp3 remains unstable.