From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752145AbeC2EyD (ORCPT ); Thu, 29 Mar 2018 00:54:03 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:35274 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751146AbeC2EyB (ORCPT ); Thu, 29 Mar 2018 00:54:01 -0400 Date: Wed, 28 Mar 2018 18:33:16 -0700 From: "Paul E. McKenney" To: Peter Zijlstra Cc: Alan Stern , schwidefsky@de.ibm.com, borntraeger@de.ibm.com, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, parri.andrea@gmail.com, will.deacon@arm.com, boqun.feng@gmail.com, npiggin@gmail.com, dhowells@redhat.com, j.alglave@ucl.ac.uk, luc.maranget@inria.fr, akiyks@gmail.com Subject: Re: [PATCH RFC tools/memory-model] Add s390.{cfg,cat} Reply-To: paulmck@linux.vnet.ibm.com References: <20180328134232.GA29274@linux.vnet.ibm.com> <20180328175136.GL4082@hirez.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180328175136.GL4082@hirez.programming.kicks-ass.net> User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-GCONF: 00 x-cbid: 18032904-0036-0000-0000-000002D89F73 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00008763; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000255; SDB=6.01009946; UDB=6.00514528; IPR=6.00789225; MB=3.00020304; MTD=3.00000008; XFM=3.00000015; UTC=2018-03-29 04:53:58 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18032904-0037-0000-0000-000043CC695A Message-Id: <20180329013316.GU3675@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2018-03-29_03:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1803290054 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Mar 28, 2018 at 07:51:36PM +0200, Peter Zijlstra wrote: > On Wed, Mar 28, 2018 at 11:01:25AM -0400, Alan Stern wrote: > > I don't quite see the point of this. You're not suggesting that we > > have one Linux Kernel Memory Consistency Model for s390 and another > > one for all the other architectures, are you? > > > > If the idea is merely to provide a herd model for s390 then it should > > go into the DIY repository, not into the LKMM repository. > > I suspect the use-case was validating s390 arch code which might not > have followed all the regular linux rules because they know its TSO. But > yes, I'm tempted to agree that even arch specific code ought to follow > the regular rules, just to avoid completely messing up the reader. Another use case is testing an s390 .cat file without having to teach herd about s390 assembly. ;-) Thanx, Paul