diff options
| author | Felix Manlunas <felix.manlunas@cavium.com> | 2017-03-29 17:56:43 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-03-22 09:17:45 +0100 |
| commit | 441f5af65244dd6585f1c364f1f4fbd00aacb64b (patch) | |
| tree | 82f843ed5b8ac5cc8e0355964665b3b752a10df2 /drivers/net/vxlan.c | |
| parent | 399a4f3c2b3f0c1812a04a4a9994ced8d1704c3d (diff) | |
vxlan: vxlan dev should inherit lowerdev's gso_max_size
[ Upstream commit d6acfeb17d030bb3907e77c048b0e7783ad8e5a9 ]
vxlan dev currently ignores lowerdev's gso_max_size, which adversely
affects TSO performance of liquidio if it's the lowerdev. Egress TCP
packets' skb->len often exceed liquidio's advertised gso_max_size. This
may happen on other NIC drivers.
Fix it by assigning lowerdev's gso_max_size to that of vxlan dev. Might as
well do likewise for gso_max_segs.
Single flow TSO throughput of liquidio as lowerdev (using iperf3):
Before the patch: 139 Mbps
After the patch : 8.68 Gbps
Percent increase: 6,144 %
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: Satanand Burla <satananda.burla@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/net/vxlan.c')
| -rw-r--r-- | drivers/net/vxlan.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index 983e941bdf29..50570d779b01 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -2912,6 +2912,11 @@ static int vxlan_dev_configure(struct net *src_net, struct net_device *dev, return -EINVAL; } + if (lowerdev) { + dev->gso_max_size = lowerdev->gso_max_size; + dev->gso_max_segs = lowerdev->gso_max_segs; + } + if (conf->mtu) { err = __vxlan_change_mtu(dev, lowerdev, dst, conf->mtu, false); if (err) |