Return-path: Received: from mail-iy0-f174.google.com ([209.85.210.174]:60288 "EHLO mail-iy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752935Ab2DFUJe convert rfc822-to-8bit (ORCPT ); Fri, 6 Apr 2012 16:09:34 -0400 Received: by iagz16 with SMTP id z16so3510519iag.19 for ; Fri, 06 Apr 2012 13:09:34 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: References: <1333630881.3494.15.camel@jlt3.sipsolutions.net> From: "Luis R. Rodriguez" Date: Fri, 6 Apr 2012 13:09:13 -0700 Message-ID: (sfid-20120406_220938_030748_DCD28BCF) Subject: Re: compat-wireless-2012-04-04 - rmmod mac80211 and PC freeze To: Janusz Dziedzic Cc: Johannes Berg , linux-wireless@vger.kernel.org Content-Type: text/plain; charset=UTF-8 Sender: linux-wireless-owner@vger.kernel.org List-ID: 2012/4/5 Janusz Dziedzic : > W dniu 6 kwietnia 2012 07:16 użytkownik Janusz Dziedzic > napisał: >> W dniu 6 kwietnia 2012 07:00 użytkownik Janusz Dziedzic >> napisał: >>> W dniu 5 kwietnia 2012 15:01 użytkownik Johannes Berg >>> napisał: >>>> On Thu, 2012-04-05 at 14:35 +0200, Janusz Dziedzic wrote: >>>>> Hello, >>>>> >>>>> I am using: compat-wireless-2012-04-04 >>>>> >>>>> I am doing such test: >>>>> - insmod compat.ko >>>>> - insmod cfg80211.ko >>>>> - insmod mac80211.ko >>>>> >>>>> After that: >>>>> - rmmod mac80211 >>>>> >>>>> And have PC freeze. >>>>> Linux uw000950 2.6.35-32-generic #67~lucid1-Ubuntu SMP Tue Mar 6 >>>>> 17:48:20 UTC 2012 x86_64 GNU/Linux >>>> >>>> Works for me, but on 3.1.0. >>>> >>>>> Any idea what could be wrong, how to debug in case of such freeze? >>>> >>>> Not really. You could try the same thing from a console, rather than an >>>> X terminal window (that I'm guessing you're using since you saw no >>>> further info) and you may see some more details? >>>> >>>> johannes >>>> >>> >>> Seems when run from console I see: >>> Kernel panic - not syncing: Fatal exception in interrupt >>> BUG: scheduling while atomic: rmmod/15474/0x10008803 >>> >>> Next a lot of information connected with dump. >>> >>> >> >> After second try: >> BUG: unable to handle kernel paging request at ffffffff98d60d20 >> IP: update_curr+0x134/0x1e0 >> Thread overran stack, or stack corrupted >> Process rmmod >> > > Issue not reproducible with compat-wireless-2012-03-18. > Seems introduced in compat-wireless-2012-04-03. Since you are not loading drivers this may be due to new changes in compat.git. You can bisect there, perhaps either e4e6f33801d78ad3b71836ce8a3058235fdaa6ef or 80bf8a835893ae35db13e3ea6f5b984352019fbe. Luis