Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965076Ab3DIQvN (ORCPT ); Tue, 9 Apr 2013 12:51:13 -0400 Received: from mail-ob0-f175.google.com ([209.85.214.175]:48934 "EHLO mail-ob0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965002Ab3DIQvK (ORCPT ); Tue, 9 Apr 2013 12:51:10 -0400 MIME-Version: 1.0 In-Reply-To: References: <31778276.CDMUtaAAnc@vostro.rjw.lan> Date: Tue, 9 Apr 2013 22:21:09 +0530 Message-ID: Subject: Re: linux-next: Tree for Apr 9 [cpufreq: NULL pointer deref] From: Viresh Kumar To: sedat.dilek@gmail.com Cc: "Rafael J. Wysocki" , Stephen Rothwell , linux-next@vger.kernel.org, linux-kernel@vger.kernel.org, cpufreq@vger.kernel.org, Linux PM list Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 969 Lines: 24 On 9 April 2013 21:38, Sedat Dilek wrote: > With x=3 the system gets in an unuseable state. > > root# echo 0 > /sys/devices/system/cpu/cpu3/online > > I could not write my reply and had to do a hard/cold reboot. > The dmesg log I saw looked similiar to my digicam-shot. Few things i need from you. First is output of cpufreq-info. Then all the steps you did to reproduce above? Removed any other cpus? I am not able to find next-20130326 tag in my repo, only have 23 and 28. Can you debug it a bit to find exact line of code causing this issue using objdump? HINT: Documentation/BUG-HUNTING.. Give me line numbers of both of these functions: __cpufreq_governor() and __cpufreq_remove_dev(). -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/