1. new skb only need dst and ip address(v4 or v6).
2. skb_copy may need high order pages, which is very rare on long running server.
Signed-off-by: NJunwei Zhang <linggao.zjw@alibaba-inc.com>
Signed-off-by: NMartin Zhang <martinbj2008@gmail.com>
Acked-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>