From: Jason Wang <jasowang@redhat.com>
To: davem@davemloft.net, mst@redhat.com, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Cc: Jason Wang <jasowang@redhat.com>, Rusty Russell <rusty@rustcorp.com.au>
Subject: [net-next PATCH 1/2] virtio-net: initialize vlan_features
Date: Thu, 11 Apr 2013 17:32:21 +0800 [thread overview]
Message-ID: <1365672742-42258-2-git-send-email-jasowang@redhat.com> (raw)
In-Reply-To: <1365672742-42258-1-git-send-email-jasowang@redhat.com>
There's nothing that prevent passing the device features of virtio_net to its
vlan device. So this patch simply passes those to vlan device to benefit from
advanced features.
Netperf shows better sending performance for vlan device since TSO can work on
vlan now.
before:
netperf -H 192.168.5.2
MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.5.2 ()
port 0 AF_INET : demo
Recv Send Send
Socket Socket Message Elapsed
Size Size Size Time Throughput
bytes bytes bytes secs. 10^6bits/sec
87380 16384 16384 10.00 4162.35
after:
netperf -H 192.168.5.2
MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.5.2 ()
port 0 AF_INET : demo
Recv Send Send
Socket Socket Message Elapsed
Size Size Size Time Throughput
bytes bytes bytes secs. 10^6bits/sec
87380 16384 16384 10.00 9365.42
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
drivers/net/virtio_net.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index f7d67e8..8fdfde6 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -1511,6 +1511,8 @@ static int virtnet_probe(struct virtio_device *vdev)
/* (!csum && gso) case will be fixed by register_netdev() */
}
+ dev->vlan_features = dev->features;
+
/* Configuration may specify what MAC to use. Otherwise random. */
if (virtio_config_val_len(vdev, VIRTIO_NET_F_MAC,
offsetof(struct virtio_net_config, mac),
--
1.7.1
next prev parent reply other threads:[~2013-04-11 9:42 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-11 9:32 [net-next PATCH 0/2] vlan TSO support for virtio-net Jason Wang
2013-04-11 9:32 ` Jason Wang [this message]
2013-04-11 9:55 ` [net-next PATCH 1/2] virtio-net: initialize vlan_features Michael S. Tsirkin
2013-04-11 9:32 ` [net-next PATCH 2/2] tuntap: " Jason Wang
2013-04-11 9:55 ` Michael S. Tsirkin
2013-04-11 20:22 ` [net-next PATCH 0/2] vlan TSO support for virtio-net David Miller
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