From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eliezer Tamir Subject: [PATCH v5 net-next 3/5] tcp: add TCP support for low latency receive poll. Date: Mon, 27 May 2013 10:44:21 +0300 Message-ID: <20130527074421.29882.73968.stgit@ladj378.jer.intel.com> References: <20130527074351.29882.51106.stgit@ladj378.jer.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Willem de Bruijn , Or Gerlitz , e1000-devel@lists.sourceforge.net, netdev@vger.kernel.org, HPA , linux-kernel@vger.kernel.org, Alex Rosenbaum , Jesse Brandeburg , Eliezer Tamir , Andi Kleen , Eilon Greenstien To: Dave Miller Return-path: In-Reply-To: <20130527074351.29882.51106.stgit@ladj378.jer.intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: e1000-devel-bounces@lists.sourceforge.net List-Id: netdev.vger.kernel.org adds busy-poll support for TCP. Signed-off-by: Alexander Duyck Signed-off-by: Jesse Brandeburg Tested-by: Willem de Bruijn Signed-off-by: Eliezer Tamir --- net/ipv4/tcp.c | 5 +++++ net/ipv4/tcp_input.c | 1 + net/ipv4/tcp_ipv4.c | 2 ++ 3 files changed, 8 insertions(+), 0 deletions(-) diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index d87ce72..652c75a 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -279,6 +279,7 @@ #include #include +#include int sysctl_tcp_fin_timeout __read_mostly = TCP_FIN_TIMEOUT; @@ -1551,6 +1552,10 @@ int tcp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, struct sk_buff *skb; u32 urg_hole = 0; + if (sk_valid_ll(sk) && skb_queue_empty(&sk->sk_receive_queue) + && (sk->sk_state == TCP_ESTABLISHED)) + sk_poll_ll(sk, nonblock); + lock_sock(sk); err = -ENOTCONN; diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 9579e1a..4d82939 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -74,6 +74,7 @@ #include #include #include +#include int sysctl_tcp_timestamps __read_mostly = 1; int sysctl_tcp_window_scaling __read_mostly = 1; diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index d20ede0..35fd8bc 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -75,6 +75,7 @@ #include #include #include +#include #include #include @@ -2011,6 +2012,7 @@ process: if (sk_filter(sk, skb)) goto discard_and_relse; + sk_mark_ll(sk, skb); skb->dev = NULL; bh_lock_sock_nested(sk); ------------------------------------------------------------------------------ Try New Relic Now & We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, & servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_may _______________________________________________ E1000-devel mailing list E1000-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired