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=-7.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 14A5DC2BA1E for ; Mon, 6 Apr 2020 15:32:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DD488248A6 for ; Mon, 6 Apr 2020 15:32:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586187158; bh=BlQIdrrOFcqez9JdgtwsN+l2kO70gj3jBKINTfGXigA=; h=Date:From:To:Cc:Subject:Reply-To:References:In-Reply-To:List-ID: From; b=esA/0UGHfeo+06/+XnPHC5G8uCW/6NmJYrYEBedu6Z3BxLHu3bVu7pkXQsTmbOj6G SDv635dhGjvFALh4OLOu8ZwWKriprIhRKHfjCPOzxYMODodT+H4V5crWYW1HIRM5ou zwQVR1Qh9X/ZxQKcSgNDZTE4hkYWjkLYNIK+xOwY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728994AbgDFPci (ORCPT ); Mon, 6 Apr 2020 11:32:38 -0400 Received: from mail.kernel.org ([198.145.29.99]:45094 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728853AbgDFPch (ORCPT ); Mon, 6 Apr 2020 11:32:37 -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 3CF1B248A6; Mon, 6 Apr 2020 15:32:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586187157; bh=BlQIdrrOFcqez9JdgtwsN+l2kO70gj3jBKINTfGXigA=; h=Date:From:To:Cc:Subject:Reply-To:References:In-Reply-To:From; b=uKGLaV9BTR1Sg2s2h8xuNINXNdm6rXaM+umYKUvRXEMf7lx64q1DcNEhCquatzuf0 c7RgzdFZx+JY1IfZuzvDTvl83flSwuGOy4ISSAPE5MzxGioEMqck6EnTGmoERsWAze oUehZaKpTNKzHKeqaNMjDHNJr2GaTX/zgiGwPkyw= Received: by paulmck-ThinkPad-P72.home (Postfix, from userid 1000) id 1924A35230D1; Mon, 6 Apr 2020 08:32:37 -0700 (PDT) Date: Mon, 6 Apr 2020 08:32:37 -0700 From: "Paul E. McKenney" To: Joel Fernandes Cc: Madhuparna Bhowmik , Amol Grover , linux-kernel@vger.kernel.org, philip.li@intel.com Subject: Re: db4ead2cd5 ("Default enable RCU list lockdep debugging with .."): WARNING: suspicious RCU usage Message-ID: <20200406153237.GF19865@paulmck-ThinkPad-P72> Reply-To: paulmck@kernel.org References: <5e89ae97.XlZ1PbIKMXWOOfLI%lkp@intel.com> <20200405145232.GY19865@paulmck-ThinkPad-P72> <20200406025056.GA13310@madhuparna-HP-Notebook> <20200406152259.GG83565@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200406152259.GG83565@google.com> User-Agent: Mutt/1.9.4 (2018-02-28) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Apr 06, 2020 at 11:22:59AM -0400, Joel Fernandes wrote: > On Mon, Apr 06, 2020 at 08:20:57AM +0530, Madhuparna Bhowmik wrote: > > On Sun, Apr 05, 2020 at 07:52:32AM -0700, Paul E. McKenney wrote: > > > On Sun, Apr 05, 2020 at 06:10:31PM +0800, kernel test robot wrote: > > > > Greetings, > > > > > > > > 0day kernel testing robot got the below dmesg and the first bad commit is > > > > > > > > https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2020.03.21a > > > > > > Is some of the required conversion still left to be done? Or on its > > > way up some other tree? > > > > > > If either of these two, my normal approach would be to hold this commit > > > back in order to give the fixes time to hit mainline. > > > > > > But either way, please let me know! > > > > > Yes, some of the patches are not yet reviewed by maintainers and we will > > resend them. Also, this report reports a few new ones that we haven't > > fixed yet (need some help from maintainers to do so). > > We are working on fixing them. May be holding the commit is a > > good idea. > > I am Ok with holding on to the commit for mainline. But I would like it into > linux-next so that we and others can get some more velocity on fixing the > remaining issues (and any maintainers who have not yet accepted patches to > review those). We fixed most of them but there could be some more lurking. > Paul, how does that sound? Once v5.7-rc1 comes out, it sounds great! (Just got my knuckles rapped (gently) for forgetting to pull this stuff out of -next for all of last week.) So early next week it returns to -next. Thanx, Paul > Either way, we should consider that this feature is turned on only for > lockdep-enabled kernels so it is only used for debugging. > > thanks, > > - Joel >