From owner-svn-src-stable@freebsd.org Thu Sep 10 12:49:17 2020 Return-Path: Delivered-To: svn-src-stable@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 299F73D6357; Thu, 10 Sep 2020 12:49:17 +0000 (UTC) (envelope-from tuexen@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4BnJcF06rlz3y1l; Thu, 10 Sep 2020 12:49:17 +0000 (UTC) (envelope-from tuexen@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id C2AE3131AB; Thu, 10 Sep 2020 12:49:16 +0000 (UTC) (envelope-from tuexen@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 08ACnGc6050810; Thu, 10 Sep 2020 12:49:16 GMT (envelope-from tuexen@FreeBSD.org) Received: (from tuexen@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 08ACnG8g050809; Thu, 10 Sep 2020 12:49:16 GMT (envelope-from tuexen@FreeBSD.org) Message-Id: <202009101249.08ACnG8g050809@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: tuexen set sender to tuexen@FreeBSD.org using -f From: Michael Tuexen Date: Thu, 10 Sep 2020 12:49:16 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r365567 - stable/12/share/man/man4 X-SVN-Group: stable-12 X-SVN-Commit-Author: tuexen X-SVN-Commit-Paths: stable/12/share/man/man4 X-SVN-Commit-Revision: 365567 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 10 Sep 2020 12:49:17 -0000 Author: tuexen Date: Thu Sep 10 12:49:16 2020 New Revision: 365567 URL: https://svnweb.freebsd.org/changeset/base/365567 Log: MFC 359422: Be a bit more precisly in the description of the sysctl variable net.inet.tcp.pmtud_blackhole_detection. Also remove three entries, which are not sysctl variables but statistic counters for TCP. Thanks to 0mp@ for suggesting an improvement. Modified: stable/12/share/man/man4/tcp.4 Directory Properties: stable/12/ (props changed) Modified: stable/12/share/man/man4/tcp.4 ============================================================================== --- stable/12/share/man/man4/tcp.4 Thu Sep 10 12:41:01 2020 (r365566) +++ stable/12/share/man/man4/tcp.4 Thu Sep 10 12:49:16 2020 (r365567) @@ -34,7 +34,7 @@ .\" From: @(#)tcp.4 8.1 (Berkeley) 6/5/93 .\" $FreeBSD$ .\" -.Dd December 1, 2019 +.Dd March 29, 2020 .Dt TCP 4 .Os .Sh NAME @@ -577,7 +577,12 @@ Turn on automatic path MTU blackhole detection. 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 configured value, otherwise, +configured value to try +.Po Va net.inet.tcp.pmtud_blackhole_mss +and +.Va net.inet.tcp.v6pmtud_blackhole_mss +.Pc , +it will be set to this value, otherwise, MSS will be set to default values .Po Va net.inet.tcp.mssdflt and @@ -587,13 +592,6 @@ and MSS to try for IPv4 if PMTU blackhole detection is turned on. .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 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 connections for which retransmits continued even after MSS -downshift. .It Va functions_available List of available TCP function blocks (TCP stacks). .It Va functions_default