I can essentially test this at will, so feel free to ask for debugging steps. My host and VMs are all Fedora 15. Every time I run tcpdump on a VM, it hangs for a while. It uses all available CPU, "virsh list" hangs trying to show it, and I can't shut it down except by killing the qemu-kvm process. After a few minutes, which amount of time seems to be proportionate to how long it's been since I last ran tcpdump (the longer it's been, the longer I have to wait) everything goes back to normal if I don't kill the VM. Any idea what's going on there? -Robin -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html