On Sun, Sep 12, 2010 at 04:39:29PM +0200, Dhaval Giani wrote: > On Sun, Sep 12, 2010 at 2:05 PM, Michael S. Tsirkin <mst@xxxxxxxxxx> wrote: > > On Fri, Sep 10, 2010 at 03:37:36PM +0200, Dhaval Giani wrote: > >> Hi, > >> > >> I have been trying to get vhost+macvtap to work for me. I run it as > >> > >> /root/qemu-kvm-vhost-net/bin/qemu-system-x86_64 -hda $IMAGE -serial > >> stdio -monitor telnet::4444,server,nowait -vnc :4: -m 3G -net > >> nic,model=virtio,macaddr=$MACADDR,netdev=macvtap0 -netdev > >> tap,id=macvtap0,vhost=on,fd=3 3<> /dev/tap5 > >> > >> in 2.6.35, which worked just fine. On the other hand, with 2.6.36, i > >> don't have working networking. I am using the same image and same > >> macaddress. The qemu is the version from > >> git://git.kernel.org/pub/scm/linux/kernel/git/mst/qemu-kvm.git vhost . > > > > BTW, by now, all these patches are merged so upstream qemu-kvm should work > > just fine for you as well. > > > >> Any suggestions will be welcome! > >> > >> Thanks, > >> Dhaval > > > > You are running this as non-root user, correct? > > nope as root. > > > This could be the permission issue that got fixed > > by 87d6a412bd1ed82c14cabd4b408003b23bbd2880. > > Could you please check the latest master from Linus, > > and let me and the list know? Thanks! > > > > this is with git of friday evening CEST. > > > Another thing to try if this does *not* help: > > > > enable CONFIG_DYNAMIC_DEBUG in kernel, > > rebuild the kernel, > > mount debugfs: > > > > mount -t debugfs none /sys/kernel/debug > > > > and then enable debug for vhost_net as described in > > Documentation/dynamic-debug-howto.txt: > > > > I will give this a run on monday morning when i am at the lab again. > > > echo 'module vhost_net +p' > /sys/kernel/debug/dynamic_debug/control > > > > Then start qemu, and after running a test, run dmesg and see if there > > are any messages from vhost_net. If yes please send them to > > me and to the list. > > > > Thanks! > > > > > thanks! > Dhaval Another thing to try check is generic net core issues. For this, try running tcpdump on both tap in host and on virtio net device in guest. Then send packets to host from guest and back, and check whether they appears on virtio and on tap. Thanks! -- MST -- 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
