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| author | Paolo Abeni <pabeni@redhat.com> | 2016-02-12 15:43:59 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-02-16 20:21:49 -0500 |
| commit | 3c1cb4d2604c03779a6c9485204e2a80be6c28f0 (patch) | |
| tree | 576d9b9b839017a90b336b2908b95dd6f2668e4e /net | |
| parent | 468dfffcd762cbb2777ec5a76bc21e3748ebf47e (diff) | |
| download | linux-3c1cb4d2604c03779a6c9485204e2a80be6c28f0.tar.gz linux-3c1cb4d2604c03779a6c9485204e2a80be6c28f0.tar.bz2 linux-3c1cb4d2604c03779a6c9485204e2a80be6c28f0.zip | |
net/ipv4: add dst cache support for gre lwtunnels
In case of UDP traffic with datagram length below MTU this
gives about 4% performance increase
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>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/ip_gre.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index 65748db44285..917c2c1bfadd 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -540,9 +540,16 @@ static void gre_fb_xmit(struct sk_buff *skb, struct net_device *dev) goto err_free_skb; key = &tun_info->key; - rt = gre_get_rt(skb, dev, &fl, key); - if (IS_ERR(rt)) - goto err_free_skb; + rt = !skb->mark ? dst_cache_get_ip4(&tun_info->dst_cache, &fl.saddr) : + NULL; + if (!rt) { + rt = gre_get_rt(skb, dev, &fl, key); + if (IS_ERR(rt)) + goto err_free_skb; + if (!skb->mark) + dst_cache_set_ip4(&tun_info->dst_cache, &rt->dst, + fl.saddr); + } tunnel_hlen = ip_gre_calc_hlen(key->tun_flags); |