From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ig0-f173.google.com (mail-ig0-f173.google.com [209.85.213.173]) by kanga.kvack.org (Postfix) with ESMTP id AF41A6B0253 for ; Wed, 5 Aug 2015 21:44:47 -0400 (EDT) Received: by igk11 with SMTP id 11so2443345igk.1 for ; Wed, 05 Aug 2015 18:44:47 -0700 (PDT) Received: from resqmta-po-06v.sys.comcast.net (resqmta-po-06v.sys.comcast.net. [2001:558:fe16:19:96:114:154:165]) by mx.google.com with ESMTPS id a18si347114igr.7.2015.08.05.18.44.43 for (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Wed, 05 Aug 2015 18:44:43 -0700 (PDT) Subject: Re: PROBLEM: 4.1.4 -- Kernel Panic on shutdown References: <55C18D2E.4030009@rjmx.net> <20150805162436.GD25159@twins.programming.kicks-ass.net> <20150805163609.GE25159@twins.programming.kicks-ass.net> From: Ron Murray Message-ID: <55C2BC00.8020302@rjmx.net> Date: Wed, 5 Aug 2015 21:44:32 -0400 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Sender: owner-linux-mm@kvack.org List-ID: To: Christoph Lameter , Peter Zijlstra Cc: Pekka Enberg , David Rientjes , Joonsoo Kim , Andrew Morton , linux-mm@kvack.org, Ingo Molnar On 08/05/2015 01:01 PM, Christoph Lameter wrote: > On Wed, 5 Aug 2015, Peter Zijlstra wrote: > >> On Wed, Aug 05, 2015 at 11:32:31AM -0500, Christoph Lameter wrote: >>> On Wed, 5 Aug 2015, Peter Zijlstra wrote: >>> >>>> I'll go have a look; but the obvious question is, what's the last kn= own >>>> good kernel? >>> 4.0.9 according to the original report. >> Weird, there have been no changes to this area in v4.0..v4.1. > Rerunning this with "slub_debug" may reveal additional info. Maybe ther= e > is some data corrupting going on. > OK, tried that (with no parameters though. Should I try some?). That got me a crash with a blank screen and no panic report. The thing is clearly touchy: small changes in memory positions make a difference. That's probably why I didn't get a panic message until 4.1.4: the gods have to all be looking in the right direction. One thing I did notice on the original report, though: > [ OK ] Deactivated swap /dev/dm-1. > [ OK ] Stopped ACPI event daemon. > [ OK ] Stopped LSB: Starts the GNUnet server at boot time.. > [ OK ] Stopped LSB: start Samba SMB/CIFS daemon (smbd). > [ OK ] Stopped LSB: start Samba daemons for the AD DC. > Stopping CUPS Scheduler... > Stopping LSB: start Samba NetBIOS nameserver (nmbd)... > [ OK ] Stopped CUPS Scheduler. > [ OK ] Stopped (null). > ------------[ cut here ]------------ Note the "Stopped (null)" before the "cut here" line. I wonder whether that has anything to do with the problem, or is it a red herring? .....Ron --=20 Ron Murray PGP Fingerprint: 0ED0 C1D1 615C FCCE 7424 9B27 31D8 AED5 AF6D 0D4A -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org