From mboxrd@z Thu Jan 1 00:00:00 1970 From: Flavio Leitner Subject: [PATCH net] veth: add vlan features Date: Thu, 18 Jul 2013 16:15:11 -0300 Message-ID: <1374174911-6435-1-git-send-email-fbl@redhat.com> Cc: Flavio Leitner To: netdev Return-path: Received: from mx1.redhat.com ([209.132.183.28]:55630 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933119Ab3GRTPX (ORCPT ); Thu, 18 Jul 2013 15:15:23 -0400 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id r6IJFLcc021604 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Thu, 18 Jul 2013 15:15:22 -0400 Sender: netdev-owner@vger.kernel.org List-ID: 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 --- drivers/net/veth.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/veth.c b/drivers/net/veth.c index da86652..eee1f19 100644 --- a/drivers/net/veth.c +++ b/drivers/net/veth.c @@ -269,6 +269,7 @@ static void veth_setup(struct net_device *dev) dev->ethtool_ops = &veth_ethtool_ops; dev->features |= NETIF_F_LLTX; dev->features |= VETH_FEATURES; + dev->vlan_features = dev->features; dev->destructor = veth_dev_free; dev->hw_features = VETH_FEATURES; -- 1.8.3.1