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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 4B73AC48BD6 for ; Wed, 26 Jun 2019 15:08:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1680D2086D for ; Wed, 26 Jun 2019 15:08:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728235AbfFZPIv (ORCPT ); Wed, 26 Jun 2019 11:08:51 -0400 Received: from mail.kernel.org ([198.145.29.99]:32870 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727481AbfFZPIu (ORCPT ); Wed, 26 Jun 2019 11:08:50 -0400 Received: from gandalf.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 299CC2080C; Wed, 26 Jun 2019 15:08:49 +0000 (UTC) Date: Wed, 26 Jun 2019 11:08:47 -0400 From: Steven Rostedt To: "Paul E. McKenney" Cc: Sebastian Andrzej Siewior , Scott Wood , Peter Zijlstra , Thomas Gleixner , Juri Lelli , Clark Williams , linux-rt-users@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH RT 4/4] rcutorture: Avoid problematic critical section nesting Message-ID: <20190626110847.2dfdf72c@gandalf.local.home> In-Reply-To: <20190621235955.GK26519@linux.ibm.com> References: <20190619011908.25026-1-swood@redhat.com> <20190619011908.25026-5-swood@redhat.com> <20190620211826.GX26519@linux.ibm.com> <20190621163821.rm2rhsnvfo5tnjul@linutronix.de> <20190621235955.GK26519@linux.ibm.com> X-Mailer: Claws Mail 3.17.3 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 21 Jun 2019 16:59:55 -0700 "Paul E. McKenney" wrote: > I have no objection to the outlawing of a number of these sequences in > mainline, but am rather pointing out that until they really are outlawed > and eliminated, rcutorture must continue to test them in mainline. > Of course, an rcutorture running in -rt should avoid testing things that > break -rt, including these sequences. We should update lockdep to complain about these sequences. That would "outlaw" them in mainline. That is, after we clean up all the current sequences in the code. And we also need to get Linus's approval of this as I believe he was against enforcing this in the past. -- Steve