The HyperV network driver can do scatter/gather but does not do checksum offload. Since the network stack requires checksum offload to do direct transmit (sendfile), netdev_register produces a message when driver is loaded. Signed-off-by: Stephen Hemminger <shemminger@xxxxxxxxxx> --- a/drivers/staging/hv/netvsc_drv.c 2011-01-06 12:23:48.143333212 -0800 +++ b/drivers/staging/hv/netvsc_drv.c 2011-01-06 12:24:10.447744121 -0800 @@ -390,8 +390,6 @@ static int netvsc_probe(struct device *d net->netdev_ops = &device_ops; /* TODO: Add GSO and Checksum offload */ - net->features = NETIF_F_SG; - SET_ETHTOOL_OPS(net, ðtool_ops); SET_NETDEV_DEV(net, device); _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/virtualization