Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751933AbdHAQmH (ORCPT ); Tue, 1 Aug 2017 12:42:07 -0400 Received: from bombadil.infradead.org ([65.50.211.133]:52818 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751898AbdHAQmG (ORCPT ); Tue, 1 Aug 2017 12:42:06 -0400 Date: Tue, 1 Aug 2017 18:42:00 +0200 From: Peter Zijlstra To: "Paul E. McKenney" Cc: Will Deacon , Boqun Feng , linux-kernel@vger.kernel.org, Ingo Molnar , Thomas Gleixner , Randy Dunlap Subject: Re: [RFC][PATCH v3]: documentation,atomic: Add new documents Message-ID: <20170801164200.oczql3m4f3zn6rin@hirez.programming.kicks-ass.net> References: <20170726115328.2sxiitivlnlq64dk@hirez.programming.kicks-ass.net> <20170726124750.vktrn5zi2gmpzfru@tardis> <20170731090535.rjgnoewqg7mhzr55@hirez.programming.kicks-ass.net> <20170731110403.ou3zqsp3uviqorkz@tardis> <20170731174345.GL3730@linux.vnet.ibm.com> <20170801090121.edo7mekhw3sann4h@hirez.programming.kicks-ass.net> <20170801101900.GB8702@arm.com> <20170801114744.evjjfviqhu5kgu7v@hirez.programming.kicks-ass.net> <20170801121713.GH8702@arm.com> <20170801161412.GW3730@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170801161412.GW3730@linux.vnet.ibm.com> User-Agent: NeoMutt/20170609 (1.8.3) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 448 Lines: 8 On Tue, Aug 01, 2017 at 09:14:12AM -0700, Paul E. McKenney wrote: > So if ARM really needs the litmus test with smp_rmb() to be allowed, > we need to adjust the Linux-kernel memory model appropriately. Which > means that one of us needs to reach out to the usual suspects. Would > you like to do that, or would you like me to? I'm really sad ARM8.1 LSE breaks this stuff.. It is rather counter intuitive (then again, we _are_ talking barriers).