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net: add dst_cache to ovs vxlan lwtunnel

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In case of UDP traffic with datagram length
below MTU this give about 2% performance increase
when tunneling over ipv4 and about 60% when tunneling
over ipv6

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Suggested-and-acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paolo Abeni
2016-02-12 15:43:57 +01:00
committed by David S. Miller
parent 0c1d70af92
commit d71785ffc7
6 changed files with 28 additions and 8 deletions
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1
net/openvswitch/Kconfig
View File

@@ -10,6 +10,7 @@ config OPENVSWITCH
select LIBCRC32C
select MPLS
select NET_MPLS_GSO
select DST_CACHE
---help---
Open vSwitch is a multilayer Ethernet switch targeted at virtualized
environments. In addition to supporting a variety of features

6
net/openvswitch/flow_netlink.c
View File

@@ -1959,6 +1959,12 @@ static int validate_and_copy_set_tun(const struct nlattr *attr,
if (!tun_dst)
return -ENOMEM;
err = dst_cache_init(&tun_dst->u.tun_info.dst_cache, GFP_KERNEL);
if (err) {
dst_release((struct dst_entry *)tun_dst);
return err;
}
a = __add_action(sfa, OVS_KEY_ATTR_TUNNEL_INFO, NULL,
sizeof(*ovs_tun), log);
if (IS_ERR(a)) {