ipv6: factorize sk_wmem_alloc updates done by __ip6_append_data()
While testing my inet defrag changes, I found that the senders could spend ~20% of cpu cycles in skb_set_owner_w() updating sk->sk_wmem_alloc for every fragment they cook, competing with TX completion of prior skbs possibly happening on another cpus. The solution to this problem is to use alloc_skb() instead of sock_wmalloc() and manually perform a single sk_wmem_alloc change. Signed-off-by:Eric Dumazet <edumazet@google.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
parent
694aba69
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