From owner-svn-src-stable-12@freebsd.org Thu Sep 10 17:31:35 2020 Return-Path: Delivered-To: svn-src-stable-12@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 4A5FB3DF242; Thu, 10 Sep 2020 17:31:35 +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 4BnQsz18rqz4NTy; Thu, 10 Sep 2020 17:31:35 +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 0B0C316351; Thu, 10 Sep 2020 17:31:35 +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 08AHVY6d024657; Thu, 10 Sep 2020 17:31:34 GMT (envelope-from tuexen@FreeBSD.org) Received: (from tuexen@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 08AHVYSE024656; Thu, 10 Sep 2020 17:31:34 GMT (envelope-from tuexen@FreeBSD.org) Message-Id: <202009101731.08AHVYSE024656@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 17:31:34 +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: r365596 - 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: 365596 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-12@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: SVN commit messages for only the 12-stable src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 10 Sep 2020 17:31:35 -0000 Author: tuexen Date: Thu Sep 10 17:31:34 2020 New Revision: 365596 URL: https://svnweb.freebsd.org/changeset/base/365596 Log: MFC r351782: Fix two TCP RACK issues: * Convert the TCP delayed ACK timer from ms to ticks as required. This fixes the timer on platforms with hz != 1000. * Don't delay acknowledgements which report duplicate data using DSACKs. 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 Thu Sep 10 17:29:20 2020 (r365595) +++ stable/12/sys/netinet/tcp_stacks/rack.c Thu Sep 10 17:31:34 2020 (r365596) @@ -1802,6 +1802,11 @@ rack_drop_checks(struct tcpopt *to, struct mbuf *m, st * will clear the DSACK block again */ tp->t_flags |= TF_ACKNOW; + /* + * ACK now, as the next in-sequence segment + * will clear the DSACK block again + */ + tp->t_flags |= TF_ACKNOW; } *drop_hdrlen += todrop; /* drop from the top afterwards */ th->th_seq += todrop; @@ -2350,7 +2355,7 @@ rack_start_hpts_timer(struct tcp_rack *rack, struct tc } hpts_timeout = rack_timer_start(tp, rack, cts); if (tp->t_flags & TF_DELACK) { - delayed_ack = tcp_delacktime; + delayed_ack = TICKS_2_MSEC(tcp_delacktime); rack->r_ctl.rc_hpts_flags |= PACE_TMR_DELACK; } if (delayed_ack && ((hpts_timeout == 0) ||