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=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 34322C433E0 for ; Sun, 17 May 2020 21:47:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 04C8D2067D for ; Sun, 17 May 2020 21:47:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589752038; bh=PNWctZk9pMdFlRDTenYl+JHp5npRYe1kEdnmws7kakU=; h=Date:From:To:Cc:Subject:Reply-To:References:In-Reply-To:List-ID: From; b=YEy/emfw4i1zJKHOizS/qCPHs03jc/X3LBHPTYVQ6FXN6rgPpW6+drsda5FQreXiV Saw7W+RpZpa7znZxaM49tdm2kY0Fgc6V57CSlvbRdohlPz6ZQ0yHPteVEX3bypnfmD TT0SgZNEuhgUYs5dl25VFLcpV0YlHtGMbA/W+Ils= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726299AbgEQVrR (ORCPT ); Sun, 17 May 2020 17:47:17 -0400 Received: from mail.kernel.org ([198.145.29.99]:40924 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726297AbgEQVrR (ORCPT ); Sun, 17 May 2020 17:47:17 -0400 Received: from paulmck-ThinkPad-P72.home (50-39-105-78.bvtn.or.frontiernet.net [50.39.105.78]) (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 D3B1320671; Sun, 17 May 2020 21:47:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589752036; bh=PNWctZk9pMdFlRDTenYl+JHp5npRYe1kEdnmws7kakU=; h=Date:From:To:Cc:Subject:Reply-To:References:In-Reply-To:From; b=0pYJcjwjUWt2iMR1Fzx4eiXRxNMJtNzQN1ic9wt17ujnkd86ZbwOxWEtwOpiFJZ50 ayFOa3Nl1r6SLO58+RA0zxc2hA3GMTOurtjhW4G6e7CxkE/R9IMd1CX1Jq3Z0HACuI f4zL2mj4RGhLcQdUiBUPhIsdeKHNvboalXxNRnwA= Received: by paulmck-ThinkPad-P72.home (Postfix, from userid 1000) id B93DB35233BC; Sun, 17 May 2020 14:47:16 -0700 (PDT) Date: Sun, 17 May 2020 14:47:16 -0700 From: "Paul E. McKenney" To: Qian Cai Cc: Stephen Rothwell , Linux Next Mailing List , Linux Kernel Mailing List , Madhuparna Bhowmik , Amol Grover , Dmitry Vyukov , philip.li@intel.com, lkp@intel.com, fengguang.wu@intel.com, rong.a.chen@intel.com Subject: Re: Default enable RCU list lockdep debugging with PROVE_RCU Message-ID: <20200517214716.GT2869@paulmck-ThinkPad-P72> Reply-To: paulmck@kernel.org References: <20200514181305.GT2869@paulmck-ThinkPad-P72> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.4 (2018-02-28) Sender: linux-next-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-next@vger.kernel.org On Fri, May 15, 2020 at 02:36:26PM -0400, Qian Cai wrote: > > > > On May 14, 2020, at 2:13 PM, Paul E. McKenney wrote: > > > > Fair enough! And yes, the Linux kernel is quite large, so I certainly am > > not asking you to test the whole thing yourself. > > Ok, I saw 0day bot also started to report those which is good. For example, > > lkml.org/lkml/2020/5/12/1358 > > which so far is nit blocking 0day on linux-next since it does not use panic_on_warn yet (while syzbot does). > > Thus, I am more convinced that we should not revert the commit just for syzbot until someone could also convince 0day to select RCU_EXPERT and then DEBUG_RCU_LIST? Let's ask the 0day people, now CCed, if they would be willing to build with CONFIG_RCU_EXPERT=y and CONFIG_DEBUG_RCU_LIST=y on some fraction of their testing. ;-) Thanx, Paul