From owner-freebsd-net@freebsd.org Fri Apr 29 01:31:57 2016 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 1F081B2017F for ; Fri, 29 Apr 2016 01:31:57 +0000 (UTC) (envelope-from daemon-user@freebsd.org) Received: from reviews.nyi.freebsd.org (reviews.nyi.freebsd.org [IPv6:2610:1c1:1:607c::16:b]) by mx1.freebsd.org (Postfix) with ESMTP id E67991110 for ; Fri, 29 Apr 2016 01:31:56 +0000 (UTC) (envelope-from daemon-user@freebsd.org) Received: by reviews.nyi.freebsd.org (Postfix, from userid 1346) id 83A56D561; Fri, 29 Apr 2016 01:31:56 +0000 (UTC) Date: Fri, 29 Apr 2016 01:31:56 +0000 To: freebsd-net@freebsd.org From: "lstewart (Lawrence Stewart)" Reply-to: D5872+325+9dea0574509cdbb3@reviews.freebsd.org Subject: [Differential] D5872: tcp: Don't prematurely drop receiving-only connections Message-ID: <54ec4b65e8299d6d3338fa0de4834240@localhost.localdomain> X-Priority: 3 X-Phabricator-Sent-This-Message: Yes X-Mail-Transport-Agent: MetaMTA X-Auto-Response-Suppress: All X-Phabricator-Mail-Tags: Thread-Topic: D5872: tcp: Don't prematurely drop receiving-only connections X-Herald-Rules: <64> X-Phabricator-To: X-Phabricator-To: X-Phabricator-To: X-Phabricator-To: X-Phabricator-To: X-Phabricator-To: X-Phabricator-To: X-Phabricator-To: X-Phabricator-To: X-Phabricator-To: X-Phabricator-To: X-Phabricator-To: X-Phabricator-To: X-Phabricator-Cc: X-Phabricator-Cc: X-Phabricator-Cc: Precedence: bulk In-Reply-To: References: Thread-Index: MmVmNzYzNzljOGQxMmM4MWI4MmNjYzcxMzczIFciuYw= MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="utf-8" X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.21 List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 29 Apr 2016 01:31:57 -0000 lstewart added a comment. In https://reviews.freebsd.org/D5872#130179, @sepherosa_gmail.com wrote: > We probably can leave the cwnd resetting to later rexmt timeout or possible later fast retransmit (I think fast retransmit could kick in under some cases, if ENOBUFS happened); instead of resetting the cwnd immediately upon ENOBUFS. Please leave the manipulation of cwnd as is so as to avoid conflating two different changes. The manipulation of cwnd on local drop has nothing to do with the subject of this particular change. Also, the patch we're reviewing here should be the commit candidate i.e. what will actually land in the tree. I understand that you need to test with something different than the commit candidate, but that should just be noted in the review description. We all need to see the final code as there are many subtleties here that require close attention from as many sets of eyes as possible. REVISION DETAIL https://reviews.freebsd.org/D5872 EMAIL PREFERENCES https://reviews.freebsd.org/settings/panel/emailpreferences/ To: sepherosa_gmail.com, network, glebius, adrian, delphij, decui_microsoft.com, honzhan_microsoft.com, howard0su_gmail.com, freebsd-net-list, lstewart, hiren, jtl, transport Cc: gnn, mike-karels.net, jtl