Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753610AbcJNLF0 (ORCPT ); Fri, 14 Oct 2016 07:05:26 -0400 Received: from mail-pa0-f67.google.com ([209.85.220.67]:34917 "EHLO mail-pa0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752054AbcJNLFP (ORCPT ); Fri, 14 Oct 2016 07:05:15 -0400 Subject: Re: [PowerPC] Kernel panic while running CPU toggle test on 4.8.0 kernel To: Abdul Haleem , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, mpe@ellerman.id.au, ego@linux.vnet.ibm.com, aneesh.kumar@linux.vnet.ibm.com References: From: Balbir Singh Message-ID: Date: Fri, 14 Oct 2016 22:04:19 +1100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.3.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 725 Lines: 25 On 14/10/16 17:24, Abdul Haleem wrote: > Hi, > > Kernel Oops, followed by kernel panic seen while running rcutorture test on 4.8.0 kernel > Machine Type : PowerPC Bare Metal > > RCU torture test steps: > 1. modprobe rcutorture > 2. start CPU offline and online while torture test is running > > dmesg start flooded with Oops messages following kernel panic resulted in machine reboot. Good bug. The report looks good Any chance you could add ftrace_dump_on_oops to command line and start this test with tracing enabled? Otherwise, getting the line via addr2line of select_task_rq_fair+0xac8/0xca0 would be helpful. It would also be nice to know the CFAR value (CFAR: c0000000000089e0) using addr2line Balbir Singh.