From mboxrd@z Thu Jan 1 00:00:00 1970 From: John Heffner Subject: [PATCH 2/3] TCP sysctl documentation: MTU probing Date: Mon, 26 Feb 2007 20:09:35 -0500 Message-ID: <45E384CF.2020800@psc.edu> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="------------090103060204080207070101" To: David Miller , netdev Return-path: Received: from mailer1.psc.edu ([128.182.58.100]:54927 "EHLO mailer1.psc.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161044AbXB0BJl (ORCPT ); Mon, 26 Feb 2007 20:09:41 -0500 Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org This is a multi-part message in MIME format. --------------090103060204080207070101 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit --------------090103060204080207070101 Content-Type: text/plain; x-mac-type="0"; x-mac-creator="0"; name="doc3.patch" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="doc3.patch" Documentation for sysctls tcp_mtu_probing and tcp_base_mss. Signed-off-by: John Heffner --- commit 6da0563572e0a6d0abda9d950f30902844c37862 tree 6f21ae02c11a1340412a926e8e2f568f5ed3b5a8 parent 17cb799000caef3b2fed28cc5d0601bb2311efa8 author John Heffner Mon, 26 Feb 2007 20:02:35 -0500 committer John Heffner Mon, 26 Feb 2007 20:02:35 -0500 Documentation/networking/ip-sysctl.txt | 12 ++++++++++++ 1 files changed, 12 insertions(+), 0 deletions(-) diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt index 891f389..d3aae1f 100644 --- a/Documentation/networking/ip-sysctl.txt +++ b/Documentation/networking/ip-sysctl.txt @@ -147,6 +147,11 @@ tcp_available_congestion_control - STRING More congestion control algorithms may be available as modules, but not loaded. +tcp_base_mss - INTEGER + The initial value of search_low to be used by Packetization Layer + Path MTU Discovery (MTU probing). If MTU probing is enabled, + this is the inital MSS used by the connection. + tcp_congestion_control - STRING Set the congestion control algorithm to be used for new connections. The algorithm "reno" is always available, but @@ -249,6 +254,13 @@ tcp_moderate_rcvbuf - BOOLEAN match the size required by the path for full throughput. Enabled by default. +tcp_mtu_probing - INTEGER + Controls TCP Packetization-Layer Path MTU Discovery. Takes three + values: + 0 - Disabled + 1 - Disabled by default, enabled when an ICMP black hole detected + 2 - Always enabled, use initial MSS of tcp_base_mss. + tcp_no_metrics_save - BOOLEAN By default, TCP saves various connection metrics in the route cache when the connection closes, so that connections established in the --------------090103060204080207070101--