From mboxrd@z Thu Jan 1 00:00:00 1970 From: Fan Du Subject: [PATCHv5 net-next 4/4] ipv4: Documenting two sysctls for tcp PMTU probe Date: Fri, 6 Mar 2015 11:18:25 +0800 Message-ID: <1425611905-28503-5-git-send-email-fan.du@intel.com> References: <1425611905-28503-1-git-send-email-fan.du@intel.com> Cc: davem@davemloft.net, edumazet@google.com, netdev@vger.kernel.org, fengyuleidian0615@gmail.com To: jheffner@psc.edu Return-path: Received: from mga03.intel.com ([134.134.136.65]:38531 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753985AbbCFDXY (ORCPT ); Thu, 5 Mar 2015 22:23:24 -0500 In-Reply-To: <1425611905-28503-1-git-send-email-fan.du@intel.com> Sender: netdev-owner@vger.kernel.org List-ID: Namely tcp_probe_interval to control how often to restart a probe. And tcp_probe_threshold to control when stop the probing in respect to the width of search range in bytes Signed-off-by: Fan Du --- Documentation/networking/ip-sysctl.txt | 10 ++++++++++ 1 files changed, 10 insertions(+), 0 deletions(-) diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt index 1b8c964..4412f69 100644 --- a/Documentation/networking/ip-sysctl.txt +++ b/Documentation/networking/ip-sysctl.txt @@ -388,6 +388,16 @@ tcp_mtu_probing - INTEGER 1 - Disabled by default, enabled when an ICMP black hole detected 2 - Always enabled, use initial MSS of tcp_base_mss. +tcp_probe_interval - INTEGER + Controls how often to start TCP Packetization-Layer Path MTU + Discovery reprobe. The default is reprobing every 10 minutes as + per RFC4821. + +tcp_probe_threshold - INTEGER + Controls when TCP Packetization-Layer Path MTU Discovery probing + will stop in respect to the width of search range in bytes. Default + is 8 bytes. + 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 -- 1.7.1