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Commit e4cbb02a authored Apr 30, 2012 by Eric Dumazet Committed by David S. Miller May 01, 2012

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>

parent 5dac94e1

net/core/sock.c

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -1700,6 +1700,7 @@ static void __release_sock(struct sock *sk)
	do {		do {
	struct sk_buff *next = skb->next;		struct sk_buff *next = skb->next;

			prefetch(next);
	WARN_ON_ONCE(skb_dst_is_noref(skb));		WARN_ON_ONCE(skb_dst_is_noref(skb));
	skb->next = NULL;		skb->next = NULL;
	sk_backlog_rcv(sk, skb);		sk_backlog_rcv(sk, skb);