From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753172AbaHDVsp (ORCPT ); Mon, 4 Aug 2014 17:48:45 -0400 Received: from natalenko.name ([78.47.77.148]:54988 "EHLO natalenko.name" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751939AbaHDVsn convert rfc822-to-8bit (ORCPT ); Mon, 4 Aug 2014 17:48:43 -0400 X-Greylist: delayed 565 seconds by postgrey-1.27 at vger.kernel.org; Mon, 04 Aug 2014 17:48:43 EDT DMARC-Filter: OpenDMARC Filter v1.2.0 natalenko.name 74086A533 Authentication-Results: mail.natalenko.name; dmarc=none header.from=natalenko.name From: Oleksandr Natalenko To: linux-kernel@vger.kernel.org Cc: linux-pm@vger.kernel.org Subject: [BUG] oops in cpufreq driver with AMD Kaveri CPU Date: Tue, 05 Aug 2014 00:39:11 +0300 Message-ID: <4708675.eITUXPv8Ih@spock> User-Agent: KMail/4.13.3 (Linux/3.15.0-pf4; KDE/4.13.3; x86_64; ; ) MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT Content-Type: text/plain; charset="utf-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello. Occasionally I get my machine hung completely. Fortunately, I've got and saved oops listing using netconsole before hang, and here it is [1]. Here is little piece of oops from the link above: === [15051.270461] BUG: unable to handle kernel paging request at 00000000ff5ae8e4 [15051.271583] IP: [] srcu_notifier_call_chain+0xe/0x20 … [15051.956205] Call Trace: [15051.980641] [] ? __cpufreq_notify_transition+0x95/0x1e0 [15052.005640] [] cpufreq_notify_transition+0x3e/0x70 [15052.030240] [] cpufreq_freq_transition_begin+0xe8/0x130 [15052.054522] [] ? ucs2_strncmp+0x70/0x70 [15052.078208] [] __target_index+0xbf/0x1a0 [15052.101348] [] __cpufreq_driver_target+0xfc/0x160 [15052.124250] [] od_check_cpu+0xa4/0xb0 [15052.146789] [] dbs_check_cpu+0x16c/0x1c0 [15052.168935] [] od_dbs_timer+0x11d/0x180 [15052.190607] [] process_one_work+0x17f/0x4c0 [15052.211825] [] worker_thread+0x11b/0x3f0 [15052.232490] [] ? create_and_start_worker+0x80/0x80 [15052.253127] [] kthread+0xc9/0xe0 [15052.273292] [] ? flush_kthread_worker+0xb0/0xb0 [15052.293487] [] ret_from_fork+0x7c/0xb0 [15052.313544] [] ? flush_kthread_worker+0xb0/0xb0 … === Also here is my lspci [2] and cpuinfo [3] as well. Vanilla 3.15.8 and 3.16.0 are affected as well as latest Ubuntu 3.13 kernel. No visible reason to trigger the bug. After hang machine doesn't respond via network, there's no disk IO, and also it doesn't respond to pressing power button in order to perform soft off. [1] https://gist.github.com/085af9da81197faf6637 [2] https://gist.github.com/318ebda5576b099590b8 [3] https://gist.github.com/9c1307463c7ad6835b2d -- Oleksandr post-factum Natalenko, MSc pf-kernel community https://natalenko.name/