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authorDavid Majnemer <majnemer@google.com>2013-05-31 13:15:38 +0000
committerDavid S. Miller <davem@davemloft.net>2013-05-31 16:24:43 -0700
commitc3f1dbaf6e281642848b78fe101764170c15f168 (patch)
treed7cde019621827feae6b138f451876fa1aef6817 /net/ipv4
parentaef6de511a2aea78098e0d507ad7280d38b6b019 (diff)
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 <majnemer@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Paul Turner <pjt@google.com> Cc: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/tcp.c2
-rw-r--r--net/ipv4/udp.c2
2 files changed, 4 insertions, 0 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 1f58594d5a85..b5d4ad988053 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 aa5eff46d137..c7338ec79cc0 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))