From owner-svn-src-head@freebsd.org Sun Mar 29 15:43:09 2020 Return-Path: Delivered-To: svn-src-head@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 A0C9A2A2F42; Sun, 29 Mar 2020 15:43:09 +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) server-signature RSA-PSS (4096 bits) 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 48r0H04vbmz3DQD; Sun, 29 Mar 2020 15:43:08 +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 AC7B02D32; Sun, 29 Mar 2020 15:43:00 +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 02TFh03C020971; Sun, 29 Mar 2020 15:43:00 GMT (envelope-from tuexen@FreeBSD.org) Received: (from tuexen@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 02TFh0TH020970; Sun, 29 Mar 2020 15:43:00 GMT (envelope-from tuexen@FreeBSD.org) Message-Id: <202003291543.02TFh0TH020970@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: tuexen set sender to tuexen@FreeBSD.org using -f From: Michael Tuexen Date: Sun, 29 Mar 2020 15:43:00 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r359422 - head/share/man/man4 X-SVN-Group: head X-SVN-Commit-Author: tuexen X-SVN-Commit-Paths: head/share/man/man4 X-SVN-Commit-Revision: 359422 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 29 Mar 2020 15:43:09 -0000 Author: tuexen Date: Sun Mar 29 15:43:00 2020 New Revision: 359422 URL: https://svnweb.freebsd.org/changeset/base/359422 Log: 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. Reviewed by: bcr@ Sponsored by: Netflix, Inc. Differential Revision: https://reviews.freebsd.org/D24216 Modified: head/share/man/man4/tcp.4 Modified: head/share/man/man4/tcp.4 ============================================================================== --- head/share/man/man4/tcp.4 Sun Mar 29 06:48:59 2020 (r359421) +++ head/share/man/man4/tcp.4 Sun Mar 29 15:43:00 2020 (r359422) @@ -34,7 +34,7 @@ .\" From: @(#)tcp.4 8.1 (Berkeley) 6/5/93 .\" $FreeBSD$ .\" -.Dd December 2, 2019 +.Dd March 29, 2020 .Dt TCP 4 .Os .Sh NAME @@ -632,7 +632,12 @@ 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 @@ -642,13 +647,6 @@ 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