From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <SRS0=2kAr=R3=vger.kernel.org=linux-kernel-owner@kernel.org>
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=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,
	MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT 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 59AA3C43381
	for <linux-kernel@archiver.kernel.org>; Sun, 24 Mar 2019 14:44:08 +0000 (UTC)
Received: from vger.kernel.org (vger.kernel.org [209.132.180.67])
	by mail.kernel.org (Postfix) with ESMTP id 29352222F3
	for <linux-kernel@archiver.kernel.org>; Sun, 24 Mar 2019 14:44:08 +0000 (UTC)
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1727275AbfCXOoG (ORCPT
        <rfc822;linux-kernel@archiver.kernel.org>);
        Sun, 24 Mar 2019 10:44:06 -0400
Received: from mail.hallyn.com ([178.63.66.53]:59612 "EHLO mail.hallyn.com"
        rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
        id S1726090AbfCXOoG (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
        Sun, 24 Mar 2019 10:44:06 -0400
Received: by mail.hallyn.com (Postfix, from userid 1001)
        id C7E72E; Sun, 24 Mar 2019 09:44:04 -0500 (CDT)
Date:   Sun, 24 Mar 2019 09:44:04 -0500
From:   "Serge E. Hallyn" <serge@hallyn.com>
To:     Daniel Colascione <dancol@google.com>
Cc:     Christian Brauner <christian@brauner.io>,
        Joel Fernandes <joel@joelfernandes.org>,
        Suren Baghdasaryan <surenb@google.com>,
        Steven Rostedt <rostedt@goodmis.org>,
        Sultan Alsawaf <sultan@kerneltoast.com>,
        Tim Murray <timmurray@google.com>,
        Michal Hocko <mhocko@kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Arve =?iso-8859-1?B?SGr4bm5lduVn?= <arve@android.com>,
        Todd Kjos <tkjos@android.com>,
        Martijn Coenen <maco@android.com>,
        Ingo Molnar <mingo@redhat.com>,
        Peter Zijlstra <peterz@infradead.org>,
        LKML <linux-kernel@vger.kernel.org>,
        "open list:ANDROID DRIVERS" <devel@driverdev.osuosl.org>,
        linux-mm <linux-mm@kvack.org>,
        kernel-team <kernel-team@android.com>,
        Oleg Nesterov <oleg@redhat.com>,
        Andy Lutomirski <luto@amacapital.net>,
        "Serge E. Hallyn" <serge@hallyn.com>,
        Kees Cook <keescook@chromium.org>
Subject: Re: pidfd design
Message-ID: <20190324144404.GA32603@mail.hallyn.com>
References: <20190319231020.tdcttojlbmx57gke@brauner.io>
 <20190320015249.GC129907@google.com>
 <CAKOZuetJzg_EiyuK7Pa13X3LKuBbreg7zJ5g4uQv_uV4wpmZjg@mail.gmail.com>
 <20190320035953.mnhax3vd47ya4zzm@brauner.io>
 <CAKOZuet3-VhmC3oHtEbPPvdiar_k_QXTf0TkgmH9LiwmW-_oNA@mail.gmail.com>
 <4A06C5BB-9171-4E70-BE31-9574B4083A9F@joelfernandes.org>
 <20190320182649.spryp5uaeiaxijum@brauner.io>
 <CAKOZuevHbQtrq+Nb-jw1L7O72BmAzcXmbUnfnseeXZjX4PE4tg@mail.gmail.com>
 <20190320185156.7bq775vvtsxqlzfn@brauner.io>
 <CAKOZuetKkPaAZvRZyG3V6RMAgOJx08dH4K4ABqLnAf53WRUHTg@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CAKOZuetKkPaAZvRZyG3V6RMAgOJx08dH4K4ABqLnAf53WRUHTg@mail.gmail.com>
User-Agent: Mutt/1.9.4 (2018-02-28)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Wed, Mar 20, 2019 at 12:29:31PM -0700, Daniel Colascione wrote:
> On Wed, Mar 20, 2019 at 11:52 AM Christian Brauner <christian@brauner.io> wrote:
> > I really want to see Joel's pidfd_wait() patchset and have more people
> > review the actual code.
> 
> Sure. But it's also unpleasant to have people write code and then have
> to throw it away due to guessing incorrectly about unclear
> requirements.

No, it is not.  It is not unpleasant.  And it is useful.  It is the best way to
identify and resolve those incorrect guesses and unclear requirements.