On Mon, Feb 01, 2010 at 10:08:53PM -0800, Sridhar Samudrala wrote: > >According to ethtool GSO is enabled on the guest, but disabling it using > >ethtool does not have any effect. But giving the kernel > >"virtio_net.gso=0" in append fixes the issue completely. > > > >Anyone having any ideas? > > > I ran into a similar problem when using Intel e1000e driver on the > host. Found a bug in most of the intel ethernet drivers when handling > large GSO IPv6 packets. > You can see the fix i submitted here > http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=8e1e8a4779cb23c1d9f51e9223795e07ec54d77a > > But you seem to be using Intel e100 driver. So i am not sure you are > running into the same issue. > You could try disabling both tso and gso on the guest using ethtool. Disabling anything inside the guest doesn't help anything, as told above. I have to disable gso using a kernel parameter in the virtio_net driver. > On the host, do you have gso/tso enabled on the uplink e100 driver? On the host everything is disabled. Offload parameters for eth0: rx-checksumming: off tx-checksumming: off scatter-gather: off tcp-segmentation-offload: off udp-fragmentation-offload: off generic-segmentation-offload: off generic-receive-offload: off large-receive-offload: off Best Regards, Bernhard -- 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
