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=-2.4 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 BB559C2BC61 for ; Sun, 28 Oct 2018 23:10:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5AB3720672 for ; Sun, 28 Oct 2018 23:10:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amarulasolutions.com header.i=@amarulasolutions.com header.b="TFY/DFTn" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5AB3720672 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=amarulasolutions.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727630AbeJ2H4T (ORCPT ); Mon, 29 Oct 2018 03:56:19 -0400 Received: from mail-ed1-f43.google.com ([209.85.208.43]:39652 "EHLO mail-ed1-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726741AbeJ2H4T (ORCPT ); Mon, 29 Oct 2018 03:56:19 -0400 Received: by mail-ed1-f43.google.com with SMTP id e5-v6so5711758eds.6 for ; Sun, 28 Oct 2018 16:10:13 -0700 (PDT) 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=vpKPgllwmuG5+Ujlt0RUdvR8CEviOcBwE+h4ookEKlc=; b=TFY/DFTnBO7d0XoPPpVdvlQr4SMY+VMVWgYIYJ28a3+02QuRnSf6SI5Axu7x1orWiz uX1B1t7zn3lpPqVyHUcVoOttFW82b8enItF1zST50M86I0fmaqn2mbk9NvM/wLQYv3kR gIVxgKZJTIGTKPYV99wd1bsy6PsCRBO+mT+zY= 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=vpKPgllwmuG5+Ujlt0RUdvR8CEviOcBwE+h4ookEKlc=; b=Rzwobuieat7z4Kl7zfysPNAS2yLnSUPlx6DxxfI00RYj6FmTYTkAnIu0Vun+jMmqgz OrUO41i4qvhW571Z1qbrLT4K1csJjZYbz/LGYdqhsl2aD3GRFQ7VUSnfJM1zdNHk3i9a ZxlxUxNLufsqLDs5+e19+IkcSQNo/eZ0m8GvvKb4uGHs77pWbOvqvblXLyN+qQ46ryD4 bcVQiJCDpGt1QhHJOy1IZFEbM0ZEDxG19wteY54ULF/OquVv4Gtk+TjamYcBNJpkCPAN Z2hfogXa8gT8m96uGU2YRsHeHGU0qci2mSUfGOKtgXRveUcoObwI0NJnS7zSSVa5sgYw 53sA== X-Gm-Message-State: AGRZ1gLNm0ZMUWt7SxP3H1yzTLsoKLOYwyo7TEewcsl0PN+OQMbCDCPP Cn3Ukn7G8rrLugT10Zlu3Q2Awg== X-Google-Smtp-Source: AJdET5eBynFG88vN2bX1+F5bFidNuCj8LuxfiXgb9JlhC8fPNe5eaPKPIcCGznzLMuzzNUbvZlGvgg== X-Received: by 2002:a50:b3cf:: with SMTP id t15-v6mr11927264edd.181.1540768212429; Sun, 28 Oct 2018 16:10:12 -0700 (PDT) Received: from andrea (15.152.230.94.awnet.cz. [94.230.152.15]) by smtp.gmail.com with ESMTPSA id w14-v6sm5370480eds.16.2018.10.28.16.10.11 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Sun, 28 Oct 2018 16:10:11 -0700 (PDT) Date: Mon, 29 Oct 2018 00:10:03 +0100 From: Andrea Parri To: "Paul E. McKenney" , Peter Zijlstra , Josh Triplett Cc: linux-kernel@vger.kernel.org Subject: Re: [RFR] Store tearing Message-ID: <20181028231003.GA4021@andrea> References: <20181028230627.GA3420@andrea> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20181028230627.GA3420@andrea> User-Agent: Mutt/1.9.4 (2018-02-28) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hopefully, with Paul's proper email address this time, Andrea On Mon, Oct 29, 2018 at 12:06:27AM +0100, Andrea Parri wrote: > Hi, > > memory-barriers.txt says: > > [on "store tearing"] > > "In fact, a recent bug (since fixed) caused GCC to incorrectly use > this optimization in a volatile store.". > > I was wondering if you could help me retrieve some reference/discussions > about this? > > Thanks, > Andrea