Merge branch 'inet-factorize-sk_wmem_alloc-updates'
Eric Dumazet says:
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inet: factorize sk_wmem_alloc updates
While testing my inet defrag changes, I found that 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.
One solution to this problem is to use alloc_skb() instead
of sock_wmalloc() and manually perform a single sk_wmem_alloc change.
This greatly increases speed for applications sending big UDP datagrams.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
