提交 7889681f 编写于 作者: D David Ahern 提交者: David S. Miller

net: vrf: Update flags and features settings

1. Default VRF devices to not having a qdisc (IFF_NO_QUEUE). Users
   can add one as desired.

2. Disable adding a VLAN to a VRF device.

3. Enable offloads and hardware features similar to other logical
   devices (e.g., dummy, veth)

Change provides a significant boost in TCP stream Tx performance,
from ~2,700 Mbps to ~18,100 Mbps and makes throughput close to the
performance without a VRF (18,500 Mbps). netperf TCP_STREAM benchmark
using qemu with virtio+vhost for the NICs
Signed-off-by: NDavid Ahern <dsa@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 df10db98
......@@ -1099,6 +1099,20 @@ static void vrf_setup(struct net_device *dev)
/* don't allow vrf devices to change network namespaces. */
dev->features |= NETIF_F_NETNS_LOCAL;
/* does not make sense for a VLAN to be added to a vrf device */
dev->features |= NETIF_F_VLAN_CHALLENGED;
/* enable offload features */
dev->features |= NETIF_F_GSO_SOFTWARE;
dev->features |= NETIF_F_RXCSUM | NETIF_F_HW_CSUM;
dev->features |= NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA;
dev->hw_features = dev->features;
dev->hw_enc_features = dev->features;
/* default to no qdisc; user can add if desired */
dev->priv_flags |= IFF_NO_QUEUE;
}
static int vrf_validate(struct nlattr *tb[], struct nlattr *data[])
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册