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=-2.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, USER_AGENT_MUTT autolearn=ham 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 1458FC43381 for ; Fri, 22 Feb 2019 11:21:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D4232206B6 for ; Fri, 22 Feb 2019 11:21:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amarulasolutions.com header.i=@amarulasolutions.com header.b="eSoKoFwa" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727011AbfBVLVh (ORCPT ); Fri, 22 Feb 2019 06:21:37 -0500 Received: from mail-wm1-f67.google.com ([209.85.128.67]:50916 "EHLO mail-wm1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726154AbfBVLVh (ORCPT ); Fri, 22 Feb 2019 06:21:37 -0500 Received: by mail-wm1-f67.google.com with SMTP id x7so1623981wmj.0 for ; Fri, 22 Feb 2019 03:21:35 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amarulasolutions.com; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=DOe342s05jtJ9dglrdQN0RDWh6bDULJiWV28ZrJBYWo=; b=eSoKoFwalpmaGFsWEpplXQfNHbN1CWaOvUWcjJT18aU++hr3v4yQTsoLlq4F8zxI1O Xe+cRRfxSn9XUXQ9ldo0t0P8gy6YxwRpQyvzOLYfs61lAY4wpQhYMn7vWiArIwrnxZfF BQrytGO8Kr4pgHkwoqr2QCH6S7dWM8KOvDVc0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=DOe342s05jtJ9dglrdQN0RDWh6bDULJiWV28ZrJBYWo=; b=jkCh9lTFy+XYRyRyWva+WdivGH5v86tqsWgXk3YJhQTHwh4JSyHa1alcnCipNf160E weTwywAkzZgWaEIisauaa1S2xyB9Y2n9snjKHDRB1wqLMwDVVrPihpJnanBCo4EEBDaR 1cM7zZcxhluxIGG+6SqLo59swDNeaGW5FUpIWrULlFBF6gHFrjVV13l4HkDhFqTFxaqC Y7cpdGHzWd63FifDBuUMMcPmNMViCzJaAcdSha8seQkdUKJFiyeU0l0AU7glky5oXl8Q oo7cNf+hZ9XO6o3lkHDjWD6RWoWml2LPKdkv+10kqfh8d3NnmlZ1z8N+uxDFWAWn/9an ccvA== X-Gm-Message-State: AHQUAubkD3rRTXU4LpZQwJ+00QdbKs7OVQJw3/RsKPqxkJwSoc1c6H5u d6o1vYqSRTN+uuC+QGUf+Jk6kg== X-Google-Smtp-Source: AHgI3Ibph9yR6rdJ0vtNV9S/m2NeM9Z1d4aaw1qJovb8CFmN/BASWAmQZ3E/dv5v9AYwBG7fRVRh3g== X-Received: by 2002:a7b:c7c2:: with SMTP id z2mr2042633wmk.47.1550834494959; Fri, 22 Feb 2019 03:21:34 -0800 (PST) Received: from andrea (85.100.broadband17.iol.cz. [109.80.100.85]) by smtp.gmail.com with ESMTPSA id n3sm1248827wrs.10.2019.02.22.03.21.33 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 22 Feb 2019 03:21:34 -0800 (PST) Date: Fri, 22 Feb 2019 12:21:28 +0100 From: Andrea Parri To: Peter Zijlstra Cc: "Paul E. McKenney" , linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, Alan Stern , Will Deacon , Boqun Feng , Nicholas Piggin , David Howells , Jade Alglave , Luc Maranget , Akira Yokosawa , Daniel Lustig Subject: Re: [RFC PATCH] tools/memory-model: Remove (dep ; rfi) from ppo Message-ID: <20190222112128.GA7213@andrea> References: <1550617057-4911-1-git-send-email-andrea.parri@amarulasolutions.com> <20190220020117.GD11787@linux.ibm.com> <20190220092604.GD32494@hirez.programming.kicks-ass.net> <20190220131456.GA3215@andrea> <20190220132714.GI32494@hirez.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190220132714.GI32494@hirez.programming.kicks-ass.net> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > What I do object to is a model that's weaker than any possible sane > hardware. Not the first time I hear you calling this out. And inevitably, every time, other slogans come to my mind: "C is not an assembly language", "No features (ordering) without users", ... For the record, I won't try to push this patch further; I also have no plans to touch herd7 internals in order to add the ad-hoc flag for the (dep ; rfi) thing. (Maybe others will/can step in here.) In the meantime, the hope (admittedly, probably vain) is that this RFC could serve as a further warning or as a reference to those developers who are quivering to use (dep ; rfi): enjoy it, be careful. Andrea