From: David Majnemer Date: Fri, 31 May 2013 13:15:38 +0000 (+0000) Subject: net: Update RFS target at poll for tcp/udp X-Git-Tag: v3.11-rc1~16^2~240 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c3f1dbaf6e281642848b78fe101764170c15f168;p=platform%2Fkernel%2Flinux-exynos.git net: Update RFS target at poll for tcp/udp The current state of affairs is that read()/write() will setup RFS (Receive Flow Steering) for internet protocol sockets while poll()/epoll() does not. When poll() gets called with a TCP or UDP socket, we should update the flow target. This permits to RFS (if enabled) to select the appropriate CPU for following incoming packets. Note: Only connected UDP sockets can benefit from RFS. Signed-off-by: David Majnemer Signed-off-by: Eric Dumazet Cc: Paul Turner Cc: Tom Herbert Signed-off-by: David S. Miller --- diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 1f58594..b5d4ad9 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -436,6 +436,8 @@ unsigned int tcp_poll(struct file *file, struct socket *sock, poll_table *wait) struct sock *sk = sock->sk; const struct tcp_sock *tp = tcp_sk(sk); + sock_rps_record_flow(sk); + sock_poll_wait(file, sk_sleep(sk), wait); if (sk->sk_state == TCP_LISTEN) return inet_csk_listen_poll(sk); diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index aa5eff4..c7338ec 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -1967,6 +1967,8 @@ unsigned int udp_poll(struct file *file, struct socket *sock, poll_table *wait) unsigned int mask = datagram_poll(file, sock, wait); struct sock *sk = sock->sk; + sock_rps_record_flow(sk); + /* Check for false positives due to checksum errors */ if ((mask & POLLRDNORM) && !(file->f_flags & O_NONBLOCK) && !(sk->sk_shutdown & RCV_SHUTDOWN) && !first_packet_length(sk))