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由 Eric Dumazet 提交于
UDP multicast rx path is a bit complex and can hold a spinlock for a long time. Using a small (32 or 64 entries) stack of socket pointers can help to perform expensive operations (skb_clone(), udp_queue_rcv_skb()) outside of the lock, in most cases. It's also a base for a future RCU conversion of multicast recption. Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com> Signed-off-by: NLucian Adrian Grijincu <lgrijincu@ixiacom.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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