From owner-svn-src-stable@freebsd.org Tue Dec 4 22:11:42 2018 Return-Path: Delivered-To: svn-src-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 47B491323315; Tue, 4 Dec 2018 22:11:42 +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 TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id E399874F27; Tue, 4 Dec 2018 22:11:41 +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 C5BBD3453; Tue, 4 Dec 2018 22:11:41 +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 wB4MBfp6097623; Tue, 4 Dec 2018 22:11:41 GMT (envelope-from tuexen@FreeBSD.org) Received: (from tuexen@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id wB4MBfO4097622; Tue, 4 Dec 2018 22:11:41 GMT (envelope-from tuexen@FreeBSD.org) Message-Id: <201812042211.wB4MBfO4097622@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: tuexen set sender to tuexen@FreeBSD.org using -f From: Michael Tuexen Date: Tue, 4 Dec 2018 22:11:41 +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: r341499 - stable/12/sys/netinet/tcp_stacks X-SVN-Group: stable-12 X-SVN-Commit-Author: tuexen X-SVN-Commit-Paths: stable/12/sys/netinet/tcp_stacks X-SVN-Commit-Revision: 341499 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: E399874F27 X-Spamd-Result: default: False [-0.11 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-0.50)[-0.502,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US]; NEURAL_SPAM_SHORT(0.48)[0.475,0]; NEURAL_HAM_LONG(-0.09)[-0.087,0] X-Rspamd-Server: mx1.freebsd.org X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.29 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: Tue, 04 Dec 2018 22:11:42 -0000 Author: tuexen Date: Tue Dec 4 22:11:41 2018 New Revision: 341499 URL: https://svnweb.freebsd.org/changeset/base/341499 Log: MFC r340777: Ensure that the default RTT stack can make an RTT measurement if the TCP connection was initiated using the RACK stack, but the peer does not support the TCP RACK extension. This ensures that the TCP behaviour on the wire is the same if the TCP connection is initated using the RACK stack or the default stack. Reviewed by: rrs@ Sponsored by: Netflix, Inc. Differential Revision: https://reviews.freebsd.org/D18032 Modified: stable/12/sys/netinet/tcp_stacks/rack.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/netinet/tcp_stacks/rack.c ============================================================================== --- stable/12/sys/netinet/tcp_stacks/rack.c Tue Dec 4 22:10:09 2018 (r341498) +++ stable/12/sys/netinet/tcp_stacks/rack.c Tue Dec 4 22:11:41 2018 (r341499) @@ -8493,9 +8493,7 @@ out: pass, rsm); if ((tp->t_flags & TF_FORCEDATA) == 0 || (rack->rc_in_persist == 0)) { -#ifdef NETFLIX_STATS tcp_seq startseq = tp->snd_nxt; -#endif /* * Advance snd_nxt over sequence space of this segment. @@ -8527,6 +8525,17 @@ out: tp->t_acktime = ticks; } tp->snd_max = tp->snd_nxt; + /* + * Time this transmission if not a retransmission and + * not currently timing anything. + * This is only relevant in case of switching back to + * the base stack. + */ + if (tp->t_rtttime == 0) { + tp->t_rtttime = ticks; + tp->t_rtseq = startseq; + TCPSTAT_INC(tcps_segstimed); + } #ifdef NETFLIX_STATS if (!(tp->t_flags & TF_GPUTINPROG) && len) { tp->t_flags |= TF_GPUTINPROG;