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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>
This commit is contained in:
Martin Zhang 2015-11-17 20:49:30 +08:00 committed by David S. Miller
parent 90836b67e2
commit 19125c1a4f
1 changed files with 1 additions and 1 deletions
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2
net/core/neighbour.c
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@ -857,7 +857,7 @@ static void neigh_probe(struct neighbour *neigh)
struct sk_buff *skb = skb_peek_tail(&neigh->arp_queue); struct sk_buff *skb = skb_peek_tail(&neigh->arp_queue);
/* keep skb alive even if arp_queue overflows */ /* keep skb alive even if arp_queue overflows */
if (skb) if (skb)
skb = skb_copy(skb, GFP_ATOMIC); skb = skb_clone(skb, GFP_ATOMIC);
write_unlock(&neigh->lock); write_unlock(&neigh->lock);
neigh->ops->solicit(neigh, skb); neigh->ops->solicit(neigh, skb);
atomic_inc(&neigh->probes); atomic_inc(&neigh->probes);