From owner-svn-src-all@FreeBSD.ORG Sun Dec 28 20:56:05 2014 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 2D953F3E; Sun, 28 Dec 2014 20:56:05 +0000 (UTC) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id F408312A4; Sun, 28 Dec 2014 20:56:04 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.9/8.14.9) with ESMTP id sBSKu4fQ072681; Sun, 28 Dec 2014 20:56:04 GMT (envelope-from sbruno@FreeBSD.org) Received: (from sbruno@localhost) by svn.freebsd.org (8.14.9/8.14.9/Submit) id sBSKu4wX072680; Sun, 28 Dec 2014 20:56:04 GMT (envelope-from sbruno@FreeBSD.org) Message-Id: <201412282056.sBSKu4wX072680@svn.freebsd.org> X-Authentication-Warning: svn.freebsd.org: sbruno set sender to sbruno@FreeBSD.org using -f From: Sean Bruno Date: Sun, 28 Dec 2014 20:56:04 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r276345 - head/share/man/man4 X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 28 Dec 2014 20:56:05 -0000 Author: sbruno Date: Sun Dec 28 20:56:03 2014 New Revision: 276345 URL: https://svnweb.freebsd.org/changeset/base/276345 Log: Correct naming of sysctl pmtud_blackhole_activated_min_mss. Clarify some statements around PMTUD blackhole detection to make the behavior more clear in the man page. Submitted by: Mikhail MFC after: 2 weeks Modified: head/share/man/man4/tcp.4 Modified: head/share/man/man4/tcp.4 ============================================================================== --- head/share/man/man4/tcp.4 Sun Dec 28 20:42:28 2014 (r276344) +++ head/share/man/man4/tcp.4 Sun Dec 28 20:56:03 2014 (r276345) @@ -521,11 +521,11 @@ This is needed to help with connection e when a broken firewall is in the network path. .It Va pmtud_blackhole_detection Turn on automatic path MTU blackhole detection. -In case of retransmits we will +In case of retransmits OS will lower the MSS to check if it's MTU problem. If current MSS is greater than -configured value to try, it will be set to it, otherwise, MSS will be set to -default values +configured value to try, it will be set to configured value, otherwise, +MSS will be set to default values .Po Va net.inet.tcp.mssdflt and .Va net.inet.tcp.v6mssdflt @@ -535,11 +535,12 @@ MSS to try for IPv4 if PMTU blackhole de .It Va v6pmtud_blackhole_mss MSS to try for IPv6 if PMTU blackhole detection is turned on. .It Va pmtud_blackhole_activated -Number of times the code was activated to attempt a MSS downshift. -.It Va pmtud_blackhole_min_activated -Number of times the blackhole MSS was used in an attempt to downshift. +Number of times configured values were used in an attempt to downshift. +.It Va pmtud_blackhole_activated_min_mss +Number of times default MSS was used in an attempt to downshift. .It Va pmtud_blackhole_failed -Number of times that we failed to connect after we downshifted the MSS. +Number of connections for which retransmits continued even after MSS +downshift. .El .Sh ERRORS A socket operation may fail with one of the following errors returned: