From patchwork Fri Mar 6 03:18:25 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fan Du X-Patchwork-Id: 446991 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 84E151400DE for ; Fri, 6 Mar 2015 14:23:37 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754128AbbCFDXd (ORCPT ); Thu, 5 Mar 2015 22:23:33 -0500 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 Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga103.jf.intel.com with ESMTP; 05 Mar 2015 19:20:49 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.11,351,1422950400"; d="scan'208";a="675963549" Received: from dufan-optiplex-9010.bj.intel.com ([10.238.155.116]) by fmsmga001.fm.intel.com with ESMTP; 05 Mar 2015 19:23:23 -0800 From: Fan Du To: jheffner@psc.edu Cc: davem@davemloft.net, edumazet@google.com, netdev@vger.kernel.org, fengyuleidian0615@gmail.com 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> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1425611905-28503-1-git-send-email-fan.du@intel.com> References: <1425611905-28503-1-git-send-email-fan.du@intel.com> Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org 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