net: use skb_clone to avoid alloc_pages failure.

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: Junwei Zhang <linggao.zjw@alibaba-inc.com>
Signed-off-by: Martin Zhang <martinbj2008@gmail.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 1aa8437..e6af42d 100644 (file)
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -857,7 +857,7 @@ static void neigh_probe(struct neighbour *neigh)
        struct sk_buff *skb = skb_peek_tail(&neigh->arp_queue);
        /* keep skb alive even if arp_queue overflows */
        if (skb)
-               skb = skb_copy(skb, GFP_ATOMIC);
+               skb = skb_clone(skb, GFP_ATOMIC);
        write_unlock(&neigh->lock);
        neigh->ops->solicit(neigh, skb);
        atomic_inc(&neigh->probes);