(BTW, this is a regression from 2.6.35 at least. I will try to figure out the last working version if you would like a bisect!) On Sun, Sep 12, 2010 at 4:40 PM, Michael S. Tsirkin <mst@xxxxxxxxxx> wrote: > 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. >> So nothing comes out with this. >> > 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. > tcpdump -i macvtap0 on the host leads to nothing. tcpdump -i eth0 on the guest leads to ARP requests, with no responses. Anything more I can try? Thanks! Dhaval -- 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
