From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-x242.google.com (mail-pa0-x242.google.com [IPv6:2607:f8b0:400e:c03::242]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3swPqk5RgkzDt3V for ; Fri, 14 Oct 2016 22:04:18 +1100 (AEDT) Received: by mail-pa0-x242.google.com with SMTP id os4so1917581pac.3 for ; Fri, 14 Oct 2016 04:04:18 -0700 (PDT) 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 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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.