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| H A D | ip6_output.c | diff 1f4c6eb24029689a40dceae561e31ff6926d7f0d Sat Mar 31 15:16:26 CDT 2018 Eric Dumazet <edumazet@google.com> 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>
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