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 Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 197CCC76195 for ; Fri, 24 Mar 2023 03:33:42 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4PjSVD3pzyz3f88 for ; Fri, 24 Mar 2023 14:33:40 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=Q33hzY5m; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=145.40.68.75; helo=ams.source.kernel.org; envelope-from=paulmck@kernel.org; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=Q33hzY5m; dkim-atps=neutral Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4PjSTC09Ffz3cjR for ; Fri, 24 Mar 2023 14:32:46 +1100 (AEDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 21254B822BE; Fri, 24 Mar 2023 03:32:42 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B290EC433D2; Fri, 24 Mar 2023 03:32:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1679628760; bh=OWNJZwWiFmA/faeysy2IdxPG176Z+OxV6VgwG074rvg=; h=Date:From:To:Cc:Subject:Reply-To:References:In-Reply-To:From; b=Q33hzY5m+3GuSibvZmQMaCIZwwYtDzluvrxoeOOmhNXKJwqqhOLD/DuvR+81TgpET /8iCipv7zn0/Nj9nB1sMQzynaEcjqTQ1ape/F+gSFEQRSEANqqQB/cnvybBs1Kp/AR Ynkfo5VzHw9O0bWcIzoK0Y7C3CJJLWqe71V0p00JV1xo8g8MR/lDQ6DQs5SpWWJmmG Vtw13t61n2W60NJHyKHagXDSeRWJTqOwfSNv4VlsLEsYeo/srrBBP+jWXdhctgob81 X2XUw2lxo6v710sRKom16BQQGt0ykawwI83iyZ2Yf2BOZX7w4847hYZ/AY9l5Lf9qg 3AUIbRng0LLpw== Received: by paulmck-ThinkPad-P72.home (Postfix, from userid 1000) id 673B81540379; Thu, 23 Mar 2023 20:32:40 -0700 (PDT) Date: Thu, 23 Mar 2023 20:32:40 -0700 From: "Paul E. McKenney" To: Sachin Sant Subject: Re: [next-20230322] Kernel WARN at kernel/workqueue.c:3182 (rcutorture) Message-ID: References: <139BEB3F-BC1C-4ABA-8928-9A8EF3FB5EDD@linux.ibm.com> <233B28DA-70DD-4AD8-9C72-1FFCA6EFE56D@linux.ibm.com> <23F7ADE0-0B96-4257-8910-6B678E0F0C7A@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <23F7ADE0-0B96-4257-8910-6B678E0F0C7A@linux.ibm.com> X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: paulmck@kernel.org Cc: Zqiang , linux-next@vger.kernel.org, linuxppc-dev , open list Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Fri, Mar 24, 2023 at 08:47:38AM +0530, Sachin Sant wrote: > > >>> Hello, Sachin, and it looks like you hit something that Zqiang and I > >>> have been tracking down. I am guessing that you were using modprobe > >>> and rmmod to make this happen, and that this happened at rmmod time. > >>> > >> Yes, the LTP test script rcu_torture.sh relies on modprobe to load/unload > >> the rcutorture module. > >> > >>> Whatever the reproducer, does the following patch help? > >> > >> Thank you for the patch. Yes, with this patch applied, the test completes > >> successfully without the reported warning. > > > > Very good, thank you! May we have your Tested-by? > > Tested-by: Sachin Sant Thank you, and I will apply on the next rebase. Thanx, Paul