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=-2.1 required=3.0 tests=DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,T_DKIM_INVALID, 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 1FAF7C43A1D for ; Thu, 12 Jul 2018 12:12:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B36F720BEC for ; Thu, 12 Jul 2018 12:12:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="iR4WTXxh" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B36F720BEC Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org 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 S1727346AbeGLMVR (ORCPT ); Thu, 12 Jul 2018 08:21:17 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:41754 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726580AbeGLMVQ (ORCPT ); Thu, 12 Jul 2018 08:21:16 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=dgHt3S1wvZn0APDqkvzdVp4+GOgkJxee5MQO4eFiUFM=; b=iR4WTXxhSD9gUmNnIaPcFdoo/ cNimfnwVxHt19lwBU14SWfE/UMGzQthllqwyzTKHmkyP8rRDeqUl03AVKpEcb6SwBtXwLzcOtCmWN iYMZLHZOXV33jjxcDeBjvJrEo8X6VS/wJ9s6fUtpnm7A+dgW9kBOC5OHInpGTWqYo67aS9G6aBGbj ODxwrAWchwfiwAu9HwA6XEaN7Llkn0gCgRyxEBmv9S3vSgFCAQEiEhz3WbIJ+IdC+53Tkko3AICwV Is00U1btfpZrVKsKDfND7z99SvQpyGTDCFVDJPMi/b9B9ot8dswyVPmzrpcBaqWxteISBi1y6G+J0 ftrYm7R7A==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=hirez.programming.kicks-ass.net) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1fdaRo-0005C0-LC; Thu, 12 Jul 2018 12:11:48 +0000 Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 5FB9320291063; Thu, 12 Jul 2018 14:11:46 +0200 (CEST) Date: Thu, 12 Jul 2018 14:11:46 +0200 From: Peter Zijlstra To: Andrea Parri Cc: Will Deacon , Alan Stern , "Paul E. McKenney" , LKMM Maintainers -- Akira Yokosawa , Boqun Feng , Daniel Lustig , David Howells , Jade Alglave , Luc Maranget , Nicholas Piggin , Kernel development list Subject: Re: [PATCH v2] tools/memory-model: Add extra ordering for locks and remove it for ordinary release/acquire Message-ID: <20180712121146.GS2494@hirez.programming.kicks-ass.net> References: <20180710093821.GA5414@andrea> <20180711094310.GA13963@arm.com> <20180711123421.GA9673@andrea> <20180712074040.GA4920@worktop.programming.kicks-ass.net> <20180712115249.GA6201@andrea> <20180712120100.GA7404@andrea> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180712120100.GA7404@andrea> User-Agent: Mutt/1.10.0 (2018-05-17) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jul 12, 2018 at 02:01:00PM +0200, Andrea Parri wrote: > > OTOH (as I pointed out earlier) the strengthening we're configuring > > will prevent some arch. (riscv being just the example of today!) to > > go "full RCsc", and this will inevitably "complicate" both the LKMM > > "full RCpc" That's a good thing :-)