net: vrf: Update flags and features settings (7889681f) · Commits · 戴 / test

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:

David Ahern <dsa@cumulusnetworks.com> Signed-off-by:

David S. Miller <davem@davemloft.net>

drivers/net/vrf.c

+14 −0

Original line number	Diff line number	Diff line
		@@ -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[])

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