net: add a prefetch in socket backlog processing

TCP or UDP stacks have big enough latencies that prefetching next
pointer is worth it.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/net/core/sock.c b/net/core/sock.c
index 836bca6485f5..1a8835117fd6 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1700,6 +1700,7 @@ static void __release_sock(struct sock *sk)
                 do {
                         struct sk_buff *next = skb->next;
 
+                        prefetch(next);
                         WARN_ON_ONCE(skb_dst_is_noref(skb));
                         skb->next = NULL;
                         sk_backlog_rcv(sk, skb);