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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 6B78EC282E1 for ; Wed, 24 Apr 2019 09:18:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 463E220656 for ; Wed, 24 Apr 2019 09:18:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728670AbfDXJSu (ORCPT ); Wed, 24 Apr 2019 05:18:50 -0400 Received: from mout.kundenserver.de ([212.227.126.134]:33317 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727344AbfDXJSt (ORCPT ); Wed, 24 Apr 2019 05:18:49 -0400 Received: from [192.168.1.115] ([95.114.95.254]) by mrelayeu.kundenserver.de (mreue012 [212.227.15.167]) with ESMTPSA (Nemesis) id 1N8n8I-1ghTNx1D7O-015neJ; Wed, 24 Apr 2019 11:17:19 +0200 Subject: Re: [PATCH RFC 1/2] Add polling support to pidfd To: Daniel Colascione , Christian Brauner Cc: Joel Fernandes , Jann Horn , Oleg Nesterov , Florian Weimer , kernel list , Andy Lutomirski , Steven Rostedt , Suren Baghdasaryan , Linus Torvalds , Alexey Dobriyan , Al Viro , Andrei Vagin , Andrew Morton , Arnd Bergmann , "Eric W. Biederman" , Kees Cook , linux-fsdevel , "open list:KERNEL SELFTEST FRAMEWORK" , Michal Hocko , Nadav Amit , Serge Hallyn , Shuah Khan , Stephen Rothwell , Taehee Yoo , Tejun Heo , Thomas Gleixner , kernel-team , Tycho Andersen References: <20190411175043.31207-1-joel@joelfernandes.org> <20190416120430.GA15437@redhat.com> <20190416192051.GA184889@google.com> <20190417130940.GC32622@redhat.com> <20190419190247.GB251571@google.com> <20190419191858.iwcvqm6fihbkaata@brauner.io> <20190419194902.GE251571@google.com> From: "Enrico Weigelt, metux IT consult" Organization: metux IT consult Message-ID: <322efe1d-4acd-8ca5-1a76-51b90819ef44@metux.net> Date: Wed, 24 Apr 2019 11:17:15 +0200 User-Agent: Mozilla/5.0 (X11; Linux i686 on x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.2.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Provags-ID: V03:K1:ye7t1S/OG+TUT+i7U72x78anEJ9gMND+G3YFGNWW3yG+tukUjfe zaqzSDWxPdAyCL7N6iwGOfxYopumuQKyuT7Ch3x93EIQA9iGjLUQQyw5eQQkZl8Tiv5vB5n 32X0ccnQu1PqJpplku1jAmFF8omC2T2CDRBsDr8vWhIXRNI1AfKeEvVCRV5vuDpoUxC66g1 tH8t/47ScCyQ1uRpTpXHQ== X-UI-Out-Filterresults: notjunk:1;V03:K0:kL3mUu5jf70=:JQDcJBa9YIqvC5dRDBul0B pSTrWp2GbCdti8fcDy7hdhjH1zHOSdkpy0otxoKPMff7TBTcvw42sy7O+DYUfLmSRTUdrpbDM o4FQiIgEI0+VsP6Oyvjw7WJi3O69Xy0pWOaZD+rKY3x7Ev5wAWwXFe5B89zdaRlpYt4KGmmEY j/b8jqK5SqryAKxYTMcqUREQOKJKlvh4uk/0Wmf0KtBizKJ72iP0yvyzRVhAgNKan7FBvFMnu FHeml73hEkHynb94ywggGoL+Rhb2id3z52wsv/ygZf1FWIH8YHDQ7xxgKeoycUl8pnAEyEqg+ qZXOa1LfjIrelm+Pd/FEl7Dnn5KKKfN8etYuHJXHwVRUfENvwJUhe2oz2VODSezrEKnrnHrTP orgoR9wbhONVV54qvIRazArdO7AahbaTJYDrSdR5HFQP1dc+nfVuz8MHNHgZd/h1d0MaF7COg O7mTCa5u2E8NVegmdgBOKXsqYs8gpvY8hibRaYEqt6WyvgFggASHam6E5foSsZusjjsUMMI2V tuJ9BeYqWT82ITKjr2xpTEeH55h/ks8AkSYK+zg6Zgm++g/s2hDUanPtQfoj4guAoGCkRJ1yY N7ZKEyCMF8T1OaiDPnHcNCJ5CS4kTfPjHXTHPH2xu3OEr/C9cHsHmNcy5yfs1xl5UoVGOCPFX WeVxU+hRT9/1JW2Cxq7Ee6W2l46YR/gR0aYWjp9biJ1UrYdslpCwPgQhSbqmPidJvfhVONhKq bOh8h0xY22v++CIX4468xpRZPY3JFElgZqzq9U1cuUSxDiW0wYXlagp7RCCawm6zQmnJ/u5Jm fMolAM3nRoc2elTJPIexK4O/ZFd+AnCYRapeuDJh8ZADL1k7No+sJeAo2AOuB1WIS4jRlfmMo 56IA4lh6NPBRbHqZRcaS51yKmBiRkJciXkwBbw+2VNa7FNTg0HopjGXqmi1HZztcKfblDg92C pk9eZjt//HbSD/1+1W0keuZV+B0wvJeQ= Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 20.04.19 01:29, Daniel Colascione wrote: > The point I'm making, to be> very clear, is *NOT* that process monitoring is "not worth> considering", but that process monitoring is subtle and complicated> enough that it ought to be considered as a standalone project,> independent of pidfds proper and of the very simple and effective> pidfd system that Joel has proposed in his patch series. At that point I'm wondering: what pidfd is actually meant for, if not process monitoring ? --mtx -- Enrico Weigelt, metux IT consult Free software and Linux embedded engineering info@metux.net -- +49-151-27565287