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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 085ACC4167B for ; Thu, 10 Dec 2020 20:14:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B4B9823A33 for ; Thu, 10 Dec 2020 20:14:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2393562AbgLJUNu (ORCPT ); Thu, 10 Dec 2020 15:13:50 -0500 Received: from out03.mta.xmission.com ([166.70.13.233]:33572 "EHLO out03.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732879AbgLJTmv (ORCPT ); Thu, 10 Dec 2020 14:42:51 -0500 Received: from in01.mta.xmission.com ([166.70.13.51]) by out03.mta.xmission.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.93) (envelope-from ) id 1knRop-006yDH-4C; Thu, 10 Dec 2020 12:41:39 -0700 Received: from ip68-227-160-95.om.om.cox.net ([68.227.160.95] helo=x220.xmission.com) by in01.mta.xmission.com with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.87) (envelope-from ) id 1knRoo-0000LM-7f; Thu, 10 Dec 2020 12:41:38 -0700 From: ebiederm@xmission.com (Eric W. Biederman) To: Davidlohr Bueso Cc: Peter Zijlstra , Linus Torvalds , Bernd Edlinger , Linux Kernel Mailing List , Ingo Molnar , Will Deacon , Jann Horn , Vasiliy Kulikov , Al Viro , Oleg Nesterov , Cyrill Gorcunov , Sargun Dhillon , Christian Brauner , Arnd Bergmann , Arnaldo Carvalho de Melo , Waiman Long References: <87ft4mbqen.fsf@x220.int.ebiederm.org> <875z5h4b7a.fsf@x220.int.ebiederm.org> <20201207090953.GF3040@hirez.programming.kicks-ass.net> <20201208083412.GR2414@hirez.programming.kicks-ass.net> <20201210183849.fdgcagdn4pyghtfn@linux-p48b> Date: Thu, 10 Dec 2020 13:40:58 -0600 In-Reply-To: <20201210183849.fdgcagdn4pyghtfn@linux-p48b> (Davidlohr Bueso's message of "Thu, 10 Dec 2020 10:38:49 -0800") Message-ID: <87r1nxmotx.fsf@x220.int.ebiederm.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-XM-SPF: eid=1knRoo-0000LM-7f;;;mid=<87r1nxmotx.fsf@x220.int.ebiederm.org>;;;hst=in01.mta.xmission.com;;;ip=68.227.160.95;;;frm=ebiederm@xmission.com;;;spf=neutral X-XM-AID: U2FsdGVkX18ruw/fWoR4wfy7LMN2DCQ9CCMYZQv0YpQ= X-SA-Exim-Connect-IP: 68.227.160.95 X-SA-Exim-Mail-From: ebiederm@xmission.com Subject: Re: [PATCH] perf: Break deadlock involving exec_update_mutex X-SA-Exim-Version: 4.2.1 (built Thu, 05 May 2016 13:38:54 -0600) X-SA-Exim-Scanned: Yes (on in01.mta.xmission.com) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Davidlohr Bueso writes: > On Tue, 08 Dec 2020, Peter Zijlstra wrote: > >>I suppose I'll queue the below into tip/perf/core for next merge window, >>unless you want it in a hurry? > > I'm thinking we'd still want Eric's series on top of this for the reader > benefits of the lock. We will see shortly what happens when the various branches all make it into linux-next. The two changes don't conflict in principle so it should not be a problem. Eric