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authorDavid Ahern <dsa@cumulusnetworks.com>2016-06-13 17:14:12 -0700
committerDavid S. Miller <davem@davemloft.net>2016-06-15 14:03:48 -0700
commit7889681f4a6c2148e1245604bac751a1cae8f882 (patch)
tree699152a0f30683a142af8f221c61b1d71b66e44f /drivers/net
parentdf10db98ab546e899b79d1b2b8a00a86fe8bb29d (diff)
downloadlinux-7889681f4a6c2148e1245604bac751a1cae8f882.tar.bz2
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: David Ahern <dsa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/vrf.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/net/vrf.c b/drivers/net/vrf.c
index 0b5b3c258c2b..e3fc6d32a289 100644
--- a/drivers/net/vrf.c
+++ b/drivers/net/vrf.c
@@ -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[])