From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id A3E8EA0613 for ; Wed, 25 Sep 2019 17:06:38 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 004494C99; Wed, 25 Sep 2019 17:06:37 +0200 (CEST) Received: from qrelay246.mxroute.com (qrelay246.mxroute.com [172.82.139.246]) by dpdk.org (Postfix) with ESMTP id 2C8A534F3; Wed, 25 Sep 2019 17:06:37 +0200 (CEST) Received: from filter002.mxroute.com (unknown [116.203.155.46]) by qrelay246.mxroute.com (Postfix) with ESMTP id C600C32103E; Wed, 25 Sep 2019 11:06:35 -0400 (EDT) Received: from galaxy.mxroute.com (unknown [23.92.70.113]) by filter002.mxroute.com (Postfix) with ESMTPS id 465483F0A8; Wed, 25 Sep 2019 15:06:29 +0000 (UTC) Received: from [192.198.151.44] by galaxy.mxroute.com with esmtpsa (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128) (Exim 4.91) (envelope-from ) id 1iD8jK-0002rT-EV; Wed, 25 Sep 2019 10:57:22 -0400 To: Bruce Richardson Cc: Kevin Traynor , dpdk-dev , "O'Driscoll, Tim" , Brian , "techboard@dpdk.org" References: <126e7de8-d2cd-d9f0-4fe8-d0d05963589f@ashroe.eu> <69a1da67-da6b-f004-7b84-279c55083e2e@redhat.com> <20190925144031.GA888@bricha3-MOBL.ger.corp.intel.com> From: Ray Kinsella Openpgp: preference=signencrypt Autocrypt: addr=mdr@ashroe.eu; 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WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: <20190925144031.GA888@bricha3-MOBL.ger.corp.intel.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-AuthUser: mdr@ashroe.eu Subject: Re: [dpdk-dev] [dpdk-techboard] [RFC] Proposals and notes from ABI stability panel @ DPDK Userspace X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On 25/09/2019 15:40, Bruce Richardson wrote: > On Wed, Sep 25, 2019 at 03:29:16PM +0100, Ray Kinsella wrote: >> >>> In the short term, based on the feedback at the conference and to give >>> something concrete to be considered, here is a suggestion, >>> >>> ABI freeze starts at 20.02 for 9 months, with a review as planned to see >>> if 20.11 should be frozen 2 years. >>> >>> pros: >>> + Eliminates any need for delaying 19.11 release >>> >>> + Allows maintainers to stick to current deprecation policy if they need >>> to make changes prior to freeze (Based on comment from Hemmant) >>> >>> + Not sure if it's worthy of a new bullet or clear from above but I >>> would add that changing the release cycle/deprecation policy etc 2 weeks >>> (I think) before RC1 is late to say the least and there is no notice to >>> users >>> >>> + Means that any changes required prior to freeze are not rushed with >>> usual big LTS release (19.11). Gives more time and maybe during a saner >>> release cycle (20.02) >>> >>> cons: >>> - With view for possible 20.11 freeze, gives 2 releases to tease out >>> process instead of 3 >>> >>> - Perhaps it is desirable for some users to have the 19.11 LTS ABI >>> compatible with 20.02/05/08 releases >>> >>> I've tried to keep them objective, of course people will have different >>> opinions about starting a freeze now vs. later etc. too. >>> >>> thanks, >>> Kevin. >>> >> >> *interesting* >> >> Another approach, possibly better approach, is to see the LTS as the >> final act following an ABI declaration/freeze. >> >> We we declare the v20 ABI in DPDK 20.02, and hold that ABI until 21.02 >> including the v20.11 LTS. The LTS then becomes the cumulation of the ABI >> freeze. >> >> I didn't go this road, because of the community habit of pushing things >> in just before the LTS, I thought it would be a bridge too far, and that >> it would get considerable push back. > > I actually think this approach was initially rejected as having an ABI > break immediately after an LTS makes backporting fixes to the LTS more > problematic. > > /Bruce > That too ..