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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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10
net/core/dst.c
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@@ -265,7 +265,7 @@ again:
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 @@ struct metadata_dst *metadata_dst_alloc(u8 optslen, gfp_t flags)
}
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;