Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757495Ab3JNWnr (ORCPT ); Mon, 14 Oct 2013 18:43:47 -0400 Received: from mail-we0-f179.google.com ([74.125.82.179]:57682 "EHLO mail-we0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756563Ab3JNWnq (ORCPT ); Mon, 14 Oct 2013 18:43:46 -0400 Date: Tue, 15 Oct 2013 00:43:36 +0200 From: Frederic Weisbecker To: Knut Petersen Cc: "Paul E. McKenney" , Linus Torvalds , Ingo Molnar , Thomas Gleixner , Greg KH , linux-kernel Subject: Re: [BUG 3.12.rc4] Oops: unable to handle kernel paging request during shutdown Message-ID: <20131014224333.GG13538@localhost.localdomain> References: <525BD08C.2080101@t-online.de> <20131014212830.GD5790@linux.vnet.ibm.com> <20131014215117.GE13538@localhost.localdomain> <525C70C6.60702@t-online.de> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <525C70C6.60702@t-online.de> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1793 Lines: 51 On Tue, Oct 15, 2013 at 12:31:34AM +0200, Knut Petersen wrote: > On 14.10.2013 23:51, Frederic Weisbecker wrote: > >Also knut, do you have a serial line? > Yes, if really necesarry .... I?d prefer network Hmm, you can try but it might not be working correcty after the fault. > > > > >If so may be looking at the timer events may help. Could you try to enable the following > >timer events? > > > > echo 1 > /sys/kernel/debug/tracing/events/timer/timer_cancel > > echo 1 > /sys/kernel/debug/tracing/events/timer/timer_expire_entry > > echo 1 > /sys/kernel/debug/tracing/events/timer/timer_expire_exit > > echo 1 > /sys/kernel/debug/tracing/events/timer/timer_init > > echo 1 > /sys/kernel/debug/tracing/events/timer/timer_start > > > >And also enable ftrace_dump_on_oops: > > > > sysctl kernel.ftrace_dump_on_oops=1 > I assume you forgot .../enable several times ?! Oops, sorry yep. > > echo 1 > /sys/kernel/debug/tracing/events/timer/timer_cancel/enable > echo 1 > /sys/kernel/debug/tracing/events/timer/timer_expire_entry/enable > echo 1 > /sys/kernel/debug/tracing/events/timer/timer_expire_exit/enable > echo 1 > /sys/kernel/debug/tracing/events/timer/timer_init/enable > echo 1 > /sys/kernel/debug/tracing/events/timer/timer_start/enable > sysctl kernel.ftrace_dump_on_oops=1 > > I added that to /etc/init.d/boot.local Thanks! Now lets cross the fingers :) > > > > > >We may have some interesting clues about who manipulated the timer list last before > >the oops happened. > > > >Thanks! > > > -- 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/