From owner-svn-src-all@FreeBSD.ORG Tue Jan 20 14:26:03 2015 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 249803EC; Tue, 20 Jan 2015 14:26:03 +0000 (UTC) Received: from mail-qc0-x22c.google.com (mail-qc0-x22c.google.com [IPv6:2607:f8b0:400d:c01::22c]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id CD4AD782; Tue, 20 Jan 2015 14:26:02 +0000 (UTC) Received: by mail-qc0-f172.google.com with SMTP id i8so22246190qcq.3; Tue, 20 Jan 2015 06:26:02 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:cc:content-type; bh=Cel6iHVTbRcb5Uc6EL1LpsV0yjIEhxeCED8AR6Nzlp8=; b=nRk6AgMjcltXJEKAlYVYjESSrJv8T9p20zf7oemY9t6bkCU2BMMCY0NjuEUXsu82PM HNDQ2l7MDD6ovnGOeEbZzyh6IAZIS1Xf5XG42QMWn/ySdNtccxG5G14OCQYhKx57tvET 8Ay1kIEr8DYGtiq4G+FPAjh7hFO8OHXft7wapSGGuo1fDXkWvXADYgIxbso/ocEWQLc6 /nN49CEHOmca/IQ4hbJvocNcpvgJwVOQRqpwb6N4BHTJZNQo93VdNRZTVRTfzeGCYZ81 TnsVWQWYXePcv7FSpmsLPQbJ6gRiLcrlfIusnh/JObwvOW8eAiYCx4/1R9v9GRovgz57 yJNg== X-Received: by 10.224.45.195 with SMTP id g3mr58155148qaf.59.1421763961913; Tue, 20 Jan 2015 06:26:01 -0800 (PST) MIME-Version: 1.0 Sender: carpeddiem@gmail.com Received: by 10.140.38.100 with HTTP; Tue, 20 Jan 2015 06:25:41 -0800 (PST) In-Reply-To: <54BE21F0.6010602@selasky.org> References: <201501151532.t0FFWV2Y037455@svn.freebsd.org> <54BDD9E1.6090505@selasky.org> <20150120075126.GA42409@kib.kiev.ua> <54BE0AAA.4050104@selasky.org> <20150120090057.GD42409@kib.kiev.ua> <54BE21F0.6010602@selasky.org> From: Ed Maste Date: Tue, 20 Jan 2015 09:25:41 -0500 X-Google-Sender-Auth: mUzyHe_VsvSQbwSj-yWJpvq-ySU Message-ID: Subject: Re: svn commit: r277213 - in head: share/man/man9 sys/kern sys/ofed/include/linux sys/sys To: Hans Petter Selasky Content-Type: text/plain; charset=UTF-8 Cc: Konstantin Belousov , "svn-src-head@freebsd.org" , Adrian Chadd , "src-committers@freebsd.org" , "svn-src-all@freebsd.org" X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 20 Jan 2015 14:26:03 -0000 On 20 January 2015 at 04:37, Hans Petter Selasky wrote: > > It is not very hard to update existing callout clients and you can do it > too, if you need the extra bits of performance. Hi Hans Petter, The issue here is that the onus is on the one changing a KPI to support its consumers through the transition. This doesn't necessarily mean doing all of the work. But the KPI changes, and techniques for adapting to them, need to be communicated very well in advance of the change arriving. I appreciate that you have a patch for TCP in review now - but having Adrian encounter a huge TCP performance regression is an unfortunate way to discover this issue.