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[71.142.124.255]) by smtp.gmail.com with ESMTPSA id v1sm5318374qkb.19.2020.05.28.10.40.17 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 28 May 2020 10:40:18 -0700 (PDT) Subject: Re: [PATCH v12 00/18] Enable FSGSBASE instructions To: Thomas Gleixner , Jarkko Sakkinen Cc: Andi Kleen , Sasha Levin , linux-kernel@vger.kernel.org, bp@alien8.de, luto@kernel.org, hpa@zytor.com, dave.hansen@intel.com, tony.luck@intel.com, ravi.v.shankar@intel.com, chang.seok.bae@intel.com References: <20200511045311.4785-1-sashal@kernel.org> <0186c22a8a6be1516df0703c421faaa581041774.camel@linux.intel.com> <20200515164013.GF29995@sasha-vm> <20200518153407.GA499505@tassilo.jf.intel.com> <371e6a92cad25cbe7a8489785efa7d3457ecef3b.camel@linux.intel.com> <87v9ksvoaq.fsf@nanos.tec.linutronix.de> <20200519164853.GA19706@linux.intel.com> <7eb45e02-03bf-0af0-c915-794bf49d66d7@cs.unc.edu> <87h7w7qy18.fsf@nanos.tec.linutronix.de> <87d06opd3a.fsf@nanos.tec.linutronix.de> From: Don Porter Message-ID: Date: Thu, 28 May 2020 13:40:16 -0400 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:68.0) Gecko/20100101 Thunderbird/68.8.1 MIME-Version: 1.0 In-Reply-To: <87d06opd3a.fsf@nanos.tec.linutronix.de> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Thomas, On 5/28/20 6:29 AM, Thomas Gleixner wrote: >> Until recently, we were doing proof-of-concept research, not product >> development, and there are limited hours in the day. I also hasten to >> say that the product of research is an article, the software artifact >> serves as documentation of the experiment. In contrast, the product of >> software development is software. It takes significant time and effort >> to convert one to the other. Upstreaming code is of little scientific >> interest. But things have changed for our project; we had no users in >> 2015 and we are now un-cutting corners that are appropriate for research >> but inappropriate for production. For a research artifact with an >> audience that knew the risks, we shipped a module because it was easier >> to maintain and install than a kernel patch. > > I understand that and with a big fat warning and documentation from > start I wouldn't have complained so vehemently. This is a fair point. We will fix this ASAP, and I will be more careful about this going forward. > > Sorry for that innuendo. Now that my anger and general frustration about > this whole disaster have calmed down, I surely would not write that > again. I appreciate you saying so. Thank you. I can also understand how frustrating the history was with this feature, and we missed an opportunity to help sooner. There is a lot I still don't understand about the process of merging and testing patches in this community, but if it makes sense for us to help now, we would be willing. -Don