net: add dst_cache to ovs vxlan lwtunnel
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>
diff --git a/net/core/dst.c b/net/core/dst.c
index a1656e3..b5cbbe0 100644
--- a/net/core/dst.c
+++ b/net/core/dst.c
@@ -265,7 +265,7 @@
lwtstate_put(dst->lwtstate);
if (dst->flags & DST_METADATA)
- kfree(dst);
+ metadata_dst_free((struct metadata_dst *)dst);
else
kmem_cache_free(dst->ops->kmem_cachep, dst);
@@ -395,6 +395,14 @@
}
EXPORT_SYMBOL_GPL(metadata_dst_alloc);
+void metadata_dst_free(struct metadata_dst *md_dst)
+{
+#ifdef CONFIG_DST_CACHE
+ dst_cache_destroy(&md_dst->u.tun_info.dst_cache);
+#endif
+ kfree(md_dst);
+}
+
struct metadata_dst __percpu *metadata_dst_alloc_percpu(u8 optslen, gfp_t flags)
{
int cpu;