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| author | Felix Manlunas <felix.manlunas@cavium.com> | 2017-03-29 17:56:43 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-04-01 11:43:38 -0700 |
| commit | d6acfeb17d030bb3907e77c048b0e7783ad8e5a9 (patch) | |
| tree | bc55d69df60f67f2590cb13fee72437ad859ce52 | |
| parent | 6c7c98bad4883a4a8710c96b2b44de482865eb6e (diff) | |
| download | linux-d6acfeb17d030bb3907e77c048b0e7783ad8e5a9.tar.gz linux-d6acfeb17d030bb3907e77c048b0e7783ad8e5a9.tar.bz2 linux-d6acfeb17d030bb3907e77c048b0e7783ad8e5a9.zip | |
vxlan: vxlan dev should inherit lowerdev's gso_max_size
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>
| -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 1e54fb5c883a..714f74fb823a 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -2926,6 +2926,11 @@ 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) { int max_mtu = ETH_MAX_MTU; |