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=-7.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,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 4C755C43387 for ; Thu, 10 Jan 2019 00:40:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 129B221738 for ; Thu, 10 Jan 2019 00:40:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amarulasolutions.com header.i=@amarulasolutions.com header.b="DbO1l3Gh" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726755AbfAJAkC (ORCPT ); Wed, 9 Jan 2019 19:40:02 -0500 Received: from mail-ed1-f67.google.com ([209.85.208.67]:40874 "EHLO mail-ed1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726659AbfAJAkC (ORCPT ); Wed, 9 Jan 2019 19:40:02 -0500 Received: by mail-ed1-f67.google.com with SMTP id g22so8790121edr.7 for ; Wed, 09 Jan 2019 16:40:01 -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=BHUQDTnETOEjv40kYCAQYWIRcl3AM67mdb7HXkKNtfk=; b=DbO1l3Gh/5ZvT5YEqkgb8hnHuZJJmbcRqGXqIuZlr35QVJFlK+L8OgKupIkZPo4yPz hJPOIiCth9jYPL2z7pg8XioJLREq3DaHXtOvTMXt/EoezzYf+wlRNVNr6yI4cKP7Qgv8 GyVSICs3sItEAzZHZgPeliFlVyq9GNXxJoy7s= 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=BHUQDTnETOEjv40kYCAQYWIRcl3AM67mdb7HXkKNtfk=; b=nexvB6QnT3IrzWAfvb+pUJGkfM1n+zqtJH0zUngNtpa1Vv7kZZN2BMAEvftusWCI59 g9cqJ03d68B8OiGZylTkAdxDPATD9J2wluPYdI2wtu9YdJtvWtggh1hMzs8MUe+0IKkG ZuDYDucU3hyCQWPU/3nGg19tMw5MECGPQ2YeHbil0P67sdL9npB+VoB3tW0ukX+N4G4g Osws7YEj4YvYyB+78pF9NzOqWLhg9wwebY8QwMQyPsrVR4yxwppmVYodesylVBA8Awkl FWI0cc00WnjZYG182bzxkVCIrvW+lCSym84rD66o7WZD7EX6fObpj28zRqWIWttKBJ5t EMlg== X-Gm-Message-State: AJcUuke6RHNI/qTlTojueuDbU+yLt4vmycAMKyfPqKsIarizbBhpvA8R xmXjH5+gkwCeLlWnIxGmT702gw== X-Google-Smtp-Source: ALg8bN75S+/h5JlpuiDpbHWh1prLYVIFc+vtYUJdBjNL1RxczXJtPoNuSmw8TXOlrrDtA7dgJiIx3g== X-Received: by 2002:a17:906:681a:: with SMTP id k26-v6mr6907049ejr.62.1547080800290; Wed, 09 Jan 2019 16:40:00 -0800 (PST) Received: from andrea ([89.22.71.151]) by smtp.gmail.com with ESMTPSA id s36sm1603194edb.43.2019.01.09.16.39.58 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Wed, 09 Jan 2019 16:39:59 -0800 (PST) Date: Thu, 10 Jan 2019 01:39:52 +0100 From: Andrea Parri To: "Paul E. McKenney" Cc: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, mingo@kernel.org, stern@rowland.harvard.edu, parri.andrea@gmail.com, will.deacon@arm.com, peterz@infradead.org, boqun.feng@gmail.com, npiggin@gmail.com, dhowells@redhat.com, j.alglave@ucl.ac.uk, luc.maranget@inria.fr, akiyks@gmail.com, willy@infradead.org Subject: Re: [PATCH RFC memory-model 0/6] LKMM updates Message-ID: <20190110003952.GA4354@andrea> References: <20190109210706.GA27268@linux.ibm.com> <20190109231852.GA4494@andrea> <20190109234043.GD1215@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190109234043.GD1215@linux.ibm.com> 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 On Wed, Jan 09, 2019 at 03:40:43PM -0800, Paul E. McKenney wrote: > On Thu, Jan 10, 2019 at 12:18:53AM +0100, Andrea Parri wrote: > > On Wed, Jan 09, 2019 at 01:07:06PM -0800, Paul E. McKenney wrote: > > > Hello! > > > > > > This series contains updates for the Linux-kernel memory model: > > > > > > 1-3. Add SRCU support, courtesy of Alan Stern. > > > > > > 4. Update README for adding of SRCU support. > > > > > > 5. Update memory-barriers.txt on enforcing heavy ordering for > > > port-I/O accesses, courtesy of Will Deacon. This one needs > > > an ack, preferably by someone from Intel. Matthew Wilcox > > > posted some feedback from an Intel manual here, which might > > > be considered to be a close substitute, but... ;-) > > > > > > http://lkml.kernel.org/r/20181127192234.GF10377@bombadil.infradead.org > > > > > > 6. Update Documentation/explanation.txt to include SRCU support, > > > courtesy of Alan Stern. > > > > > > 7. Dynamically check SRCU lock-to-unlock matching, courtesy of > > > Luc Maranget. This needs an ack. > > > > It seems that > > > > 1b52d0186177 ("tools/memory-model: Model smp_mb__after_unlock_lock()") > > > > from linux-rcu/dev got lost; this also needs an ack (probably yours! ;D, > > considered that, IIRC, you introduced the primitive and RCU is currently > > its only user.) > > That commit is in -tip: > > 4607abbcf464 ("tools/memory-model: Model smp_mb__after_unlock_lock()") > > So it has already left my -rcu tree. ;-) Oh, you're right: now I see the commit (e.g., with "git show"), but I don't see the corresponding changes applied to the tree. https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?h=locking/core&id=4607abbcf464ea2be14da444215d05c73025cf6e https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/tree/tools/memory-model/linux-kernel.bell?h=locking/core Is this expected? Andrea > > Thanx, Paul >