From owner-freebsd-net@freebsd.org Wed Jan 23 22:16:56 2019 Return-Path: Delivered-To: freebsd-net@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 5DEFC14B41DD; Wed, 23 Jan 2019 22:16:56 +0000 (UTC) (envelope-from michael.tuexen@lurchi.franken.de) Received: from drew.franken.de (mail-n.franken.de [193.175.24.27]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "*.franken.de", Issuer "COMODO RSA Domain Validation Secure Server CA" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id EC5878DC3B; Wed, 23 Jan 2019 22:16:54 +0000 (UTC) (envelope-from michael.tuexen@lurchi.franken.de) Received: from [IPv6:2003:cd:6f38:4a00:94cf:f60c:44fd:eca2] (p200300CD6F384A0094CFF60C44FDECA2.dip0.t-ipconnect.de [IPv6:2003:cd:6f38:4a00:94cf:f60c:44fd:eca2]) (Authenticated sender: lurchi) by drew.franken.de (Postfix) with ESMTPSA id 9A4F2721E280C; Wed, 23 Jan 2019 23:16:45 +0100 (CET) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 12.2 \(3445.102.3\)) Subject: Re: RFC8312 Cubic From: Michael Tuexen In-Reply-To: Date: Wed, 23 Jan 2019 23:16:43 +0100 Cc: "Scheffenegger, Richard" , "freebsd-transport@freebsd.org" , "freebsd-net@freebsd.org" Content-Transfer-Encoding: quoted-printable Message-Id: References: To: Freddie Cash X-Mailer: Apple Mail (2.3445.102.3) X-Spam-Status: No, score=-2.9 required=5.0 tests=ALL_TRUSTED,BAYES_00 autolearn=disabled version=3.4.1 X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on mail-n.franken.de X-Rspamd-Queue-Id: EC5878DC3B X-Spamd-Bar: / Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-0.28 / 15.00]; TO_DN_EQ_ADDR_SOME(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; TO_DN_SOME(0.00)[]; MV_CASE(0.50)[]; MX_GOOD(-0.01)[donotack.franken.de,priscilla.franken.de,melissa.franken.de,drew.franken.de]; FREEMAIL_TO(0.00)[gmail.com]; RCVD_IN_DNSWL_LOW(-0.10)[27.24.175.193.list.dnswl.org : 127.0.5.1]; IP_SCORE(-0.25)[ipnet: 193.174.0.0/15(-1.18), asn: 680(-0.06), country: DE(-0.01)]; R_DKIM_NA(0.00)[]; ASN(0.00)[asn:680, ipnet:193.174.0.0/15, country:DE]; MIME_TRACE(0.00)[0:+]; MID_RHS_MATCH_FROM(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.67)[-0.670,0]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[4]; NEURAL_SPAM_SHORT(0.13)[0.131,0]; NEURAL_HAM_LONG(-0.78)[-0.776,0]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[franken.de]; AUTH_NA(1.00)[]; TO_MATCH_ENVRCPT_SOME(0.00)[]; R_SPF_NA(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[] X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 23 Jan 2019 22:16:56 -0000 > On 23. Jan 2019, at 21:41, Freddie Cash wrote: >=20 > On Wed, Jan 23, 2019 at 12:34 PM Scheffenegger, Richard < > Richard.Scheffenegger@netapp.com> wrote: >=20 >> Hi, >>=20 >> we encounted an issue with the BSD11 cubic implementation during = testing, >> when dealing with app-stalled and app-limited traffic patterns. >>=20 >> The gist is, that at least in the after_idle cong_func for cubic, the >> states for ssthresh and cubic epoch time are not reset, leading to >> excessive cwnd values (overflows even) and self-inflicted drops due = to >> dramatic burst transmissions. >>=20 >> Bug Report, or Patch directly to Phabricator (when it is fully = qualified)? >>=20 >=20 > Search the freebsd-stable mailing list archives for the thread with = subject > line: >=20 > HEADS UP: TCP CUBIC Broken on 12.0-RELEASE/STABLE >=20 > = https://lists.freebsd.org/pipermail/freebsd-stable/2018-December/090255.ht= ml >=20 > An Errata Notice should be going out sometime this month-ish. Aren't you referring to: = https://www.freebsd.org/security/advisories/FreeBSD-EN-19:01.cc_cubic.asc Best regards Michael >=20 > --=20 > Freddie Cash > fjwcash@gmail.com > _______________________________________________ > freebsd-net@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org"