diff options
| author | David Ahern <dsa@cumulusnetworks.com> | 2016-06-14 02:14:12 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-06-15 23:03:48 +0200 |
| commit | 7889681f4a6c2148e1245604bac751a1cae8f882 (patch) | |
| tree | 699152a0f30683a142af8f221c61b1d71b66e44f | |
| parent | tun: fix csum generation for tap devices (diff) | |
| download | linux-7889681f4a6c2148e1245604bac751a1cae8f882.tar.xz linux-7889681f4a6c2148e1245604bac751a1cae8f882.zip | |
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>
| -rw-r--r-- | drivers/net/vrf.c | 14 |
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[]) |