target/linux/generic/pending-4.14/616-net_optimize_xfrm_calls.patch

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Subject: kernel: add a small xfrm related performance optimization
   3
   4 Signed-off-by: Felix Fietkau <nbd@nbd.name>
   5 ---
   6  net/netfilter/nf_nat_core.c | 3 +++
   7  1 file changed, 3 insertions(+)
   8
   9 --- a/net/netfilter/nf_nat_core.c
  10 +++ b/net/netfilter/nf_nat_core.c
  11 @@ -90,6 +90,9 @@ int nf_xfrm_me_harder(struct net *net, s
  12         struct dst_entry *dst;
  13         int err;
  14
  15 +       if (skb->dev && !dev_net(skb->dev)->xfrm.policy_count[XFRM_POLICY_OUT])
  16 +               return 0;
  17 +
  18         err = xfrm_decode_session(skb, &fl, family);
  19         if (err < 0)
  20                 return err;