Re: [PATCH net-next 0/2] inet: factorize sk_wmem_alloc updates

From: Eric Dumazet <redacted>
Date: Sat, 31 Mar 2018 13:16:24 -0700

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.

Looks good, series applied, thanks.