Doug / smarc-fsl-linux-kernel

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Commit b69bbddfa136dc53ac319d58bc38b41f8aefffea

Authored by Flavio Leitner
Committed by David S. Miller
1 parent 2f0a9afaef
Exists in smarc-imx_3.14.28_1.0.0_ga and in 1 other branch imx_3.14.28_1.0.0_ga

veth: add vlan features 

The veth device doesn't provide the vlan features,
so TSO for example is disabled and that causes
performance issues when using tagged traffic.

The test topology looks like this:

    br0                     br1
  /   \                  /     \
vnet  veth0.10 ----- veth1.10   vnet
VM                               VM

The netperf results with current veth driver:
MIGRATED TCP STREAM TEST from 192.168.1.1 ()
port 0 AF_INET to 192.168.1.2 () port 0 AF_INET
Recv   Send    Send
Socket Socket  Message  Elapsed
Size   Size    Size     Time     Throughput
bytes  bytes   bytes    secs.    10^6bits/sec

 87380  16384  16384    10.01    2210.22

Now after applying the proposed patch:
MIGRATED TCP STREAM TEST from 192.168.1.1 ()
port 0 AF_INET to 192.168.1.2 () port 0 AF_INET
Recv   Send    Send
Socket Socket  Message  Elapsed
Size   Size    Size     Time     Throughput
bytes  bytes   bytes    secs.    10^6bits/sec

 87380  16384  16384    10.00    13067.47

Signed-off-by: Flavio Leitner <fbl@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Showing 1 changed file with 1 additions and 0 deletions Side-by-side Diff

... ... @@ -269,6 +269,7 @@
269 269 dev->ethtool_ops = &veth_ethtool_ops;
270 270 dev->features |= NETIF_F_LLTX;
271 271 dev->features |= VETH_FEATURES;
  272 + dev->vlan_features = dev->features;
272 273 dev->destructor = veth_dev_free;
273 274  
274 275 dev->hw_features = VETH_FEATURES;