From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755696Ab1KKM1p (ORCPT ); Fri, 11 Nov 2011 07:27:45 -0500 Received: from hera.cwi.nl ([192.16.191.8]:50231 "EHLO hera.cwi.nl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751879Ab1KKM1o (ORCPT ); Fri, 11 Nov 2011 07:27:44 -0500 Message-ID: <4EBD14B4.5000201@cwi.nl> Date: Fri, 11 Nov 2011 12:27:32 +0000 From: "Wouter M. Koolen" User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.23) Gecko/20111010 Icedove/3.1.15 MIME-Version: 1.0 To: "Rafael J. Wysocki" CC: len.brown@intel.com, pavel@ucw.cz, linux-kernel@vger.kernel.org Subject: Re: [BUG] NULL deref in swapin_readahead References: <4EBD0767.8040901@cwi.nl> <201111111307.02203.rjw@sisk.pl> In-Reply-To: <201111111307.02203.rjw@sisk.pl> Content-Type: text/plain; charset=ISO-8859-2; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/11/2011 12:07 PM, Rafael J. Wysocki wrote: > Well, the trace doesn't indicate how the problem is related to the > suspend/resume code paths. > > Is this a regression for you? > > Thanks, > Rafael Hi Rafael, This problem manifests itself when resuming from RAM, but only very infrequently. This is the third occurrence since I started using this machine three months ago. I suspend it to RAM at least twice a day. The previous two occurrences were on 3.0. So not a clear regression in that sense. (Note this is from memory, I didn't record those other two oopses) However, since it happens immediately upon resume, I suspected it was related. Would you have any tips for stress testing resumes? If I can increase the reproducibility then I could try to bisect it. Or do you think it better, judging from the back trace, to forward this to some other subsystem maintainer? Please do then, I obviously don't know how to read backtraces. Thanks, Wouter