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If using a sixtofour device on top of a bonding device, skb segmentation of TCP traffic is done right before calling bonding xmit, because bonding only enables TSO for IPv4. This patch improves single flow performance by about 120 % on my hosts, because segmentation is deferred right before calling slave xmit. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>