From 1eddceadb0d6441cd39b2c38705a8f5fec86e770 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Fri, 17 Jun 2011 03:45:15 +0000 Subject: [PATCH] net: rfs: enable RFS before first data packet is received MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Le jeudi 16 juin 2011 à 23:38 -0400, David Miller a écrit : > From: Ben Hutchings > Date: Fri, 17 Jun 2011 00:50:46 +0100 > > > On Wed, 2011-06-15 at 04:15 +0200, Eric Dumazet wrote: > >> @@ -1594,6 +1594,7 @@ int tcp_v4_do_rcv(struct sock *sk, struct sk_buff *skb) > >> goto discard; > >> > >> if (nsk != sk) { > >> + sock_rps_save_rxhash(nsk, skb->rxhash); > >> if (tcp_child_process(sk, nsk, skb)) { > >> rsk = nsk; > >> goto reset; > >> > > > > I haven't tried this, but it looks reasonable to me. > > > > What about IPv6? The logic in tcp_v6_do_rcv() looks very similar. > > Indeed ipv6 side needs the same fix. > > Eric please add that part and resubmit. And in fact I might stick > this into net-2.6 instead of net-next-2.6 > OK, here is the net-2.6 based one then, thanks ! [PATCH v2] net: rfs: enable RFS before first data packet is received First packet received on a passive tcp flow is not correctly RFS steered. One sock_rps_record_flow() call is missing in inet_accept() But before that, we also must record rxhash when child socket is setup. Signed-off-by: Eric Dumazet CC: Tom Herbert CC: Ben Hutchings CC: Jamal Hadi Salim Signed-off-by: David S. Miller --- net/ipv4/af_inet.c | 1 + net/ipv4/tcp_ipv4.c | 1 + net/ipv6/tcp_ipv6.c | 1 + 3 files changed, 3 insertions(+) diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c index 9c1926027a26..eae1f676f870 100644 --- a/net/ipv4/af_inet.c +++ b/net/ipv4/af_inet.c @@ -676,6 +676,7 @@ int inet_accept(struct socket *sock, struct socket *newsock, int flags) lock_sock(sk2); + sock_rps_record_flow(sk2); WARN_ON(!((1 << sk2->sk_state) & (TCPF_ESTABLISHED | TCPF_CLOSE_WAIT | TCPF_CLOSE))); diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index a7d6671e33b8..708dc203b034 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -1589,6 +1589,7 @@ int tcp_v4_do_rcv(struct sock *sk, struct sk_buff *skb) goto discard; if (nsk != sk) { + sock_rps_save_rxhash(nsk, skb->rxhash); if (tcp_child_process(sk, nsk, skb)) { rsk = nsk; goto reset; diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index d1fd28711ba5..87551ca568cd 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -1644,6 +1644,7 @@ static int tcp_v6_do_rcv(struct sock *sk, struct sk_buff *skb) * the new socket.. */ if(nsk != sk) { + sock_rps_save_rxhash(nsk, skb->rxhash); if (tcp_child_process(sk, nsk, skb)) goto reset; if (opt_skb) -- 2.39.2