From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1E262C433E0 for ; Thu, 4 Jun 2020 06:37:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F39992077D for ; Thu, 4 Jun 2020 06:37:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726837AbgFDGhH (ORCPT ); Thu, 4 Jun 2020 02:37:07 -0400 Received: from stargate.chelsio.com ([12.32.117.8]:25718 "EHLO stargate.chelsio.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726248AbgFDGhH (ORCPT ); Thu, 4 Jun 2020 02:37:07 -0400 Received: from localhost (moto.blr.asicdesigners.com [10.193.184.79] (may be forged)) by stargate.chelsio.com (8.13.8/8.13.8) with ESMTP id 0546aexD007993; Wed, 3 Jun 2020 23:36:41 -0700 Date: Thu, 4 Jun 2020 12:06:39 +0530 From: Dakshaja Uppalapati To: Sagi Grimberg , Christoph Hellwig Cc: eduard@hasenleithner.at, kbusch@kernel.org, gregkh@linuxfoundation.org, Nirranjan Kirubaharan , Potnuri Bharat Teja , stable@vger.kernel.org Subject: Re: [PATCH nvme] nvme: Revert "nvme: Discard workaround for non-conformant devices" Message-ID: <20200604063638.GA15118@chelsio.com> References: <20200603091851.16957-1-dakshaja@chelsio.com> <20200603130750.GA13511@lst.de> <20200603161717.GA11442@chelsio.com> <20200603162338.GA27240@lst.de> <6b58318c-fc41-66b9-b4d2-868d832392bb@grimberg.me> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <6b58318c-fc41-66b9-b4d2-868d832392bb@grimberg.me> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org On Wednesday, June 06/03/20, 2020 at 14:20:01 -0700, Sagi Grimberg wrote: > > > > > Err, why? Please send an actual bug report with details of your > > > > setup. > > > > > > Hi Christoph, > > > > > > Here is the link describing the issue initially reported for upstream > > > kernel 5.5: > > > > > > https://lore.kernel.org/linux-nvme/CH2PR12MB40053A64681EFA3E6F63FDFBDD2A0@CH2PR12MB4005.namprd12.prod.outlook.com/ > > > > > > Issue is later fixed with upstream commit b716e688. > > > > We are talking about two different things here. One is the Linux NVMe > > host code that can be used with lots of different controllers. Many of > > them are PCIe controller, especially cheap ones. > > > > The other is the Linux NVMe target code. So if a fix for very common > > PCIe controller trigger a bug in the target code there is no 1:1 > > relationship as even if you are talking to a Linux fabrics controller > > it usually runs a different kernel version on a different system. > > > > That being said you can always backport that fix as well, which probably > > is a good idea as it fixes a real bug. > > > > Nevermind that nothing in your revert patch indicated it wasn't for > > mainline. > > Agree.. Just to confirm that I got it right, Do you want me to send all 6 patches (fix and dependent patches) to stable?