From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-io0-f173.google.com (mail-io0-f173.google.com [209.85.223.173]) by kanga.kvack.org (Postfix) with ESMTP id C92586B0253 for ; Wed, 5 Aug 2015 23:31:20 -0400 (EDT) Received: by ioii16 with SMTP id i16so69253237ioi.0 for ; Wed, 05 Aug 2015 20:31:20 -0700 (PDT) Received: from resqmta-ch2-11v.sys.comcast.net (resqmta-ch2-11v.sys.comcast.net. [2001:558:fe21:29:69:252:207:43]) by mx.google.com with ESMTPS id m7si556321igk.28.2015.08.05.20.31.19 for (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Wed, 05 Aug 2015 20:31:19 -0700 (PDT) Date: Wed, 5 Aug 2015 22:31:18 -0500 (CDT) From: Christoph Lameter Subject: Re: PROBLEM: 4.1.4 -- Kernel Panic on shutdown In-Reply-To: <55C2BC00.8020302@rjmx.net> Message-ID: References: <55C18D2E.4030009@rjmx.net> <20150805162436.GD25159@twins.programming.kicks-ass.net> <20150805163609.GE25159@twins.programming.kicks-ass.net> <55C2BC00.8020302@rjmx.net> Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: Ron Murray Cc: Peter Zijlstra , Pekka Enberg , David Rientjes , Joonsoo Kim , Andrew Morton , linux-mm@kvack.org, Ingo Molnar On Wed, 5 Aug 2015, Ron Murray wrote: > 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 Hmmm... Crash early on? Could you attach a serial console and try "earlyprintk" as an option as well? > 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. Subtle corruption issue. If slub_debug does not get it then other debugging techniques may have to be used. > > [ 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? Hmmm... Thats a message from user space. -- 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