From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andres Freund Subject: Re: Soft-Lockup/Race in networking in 2.6.31-rc1+195 ( possibly?caused by netem) Date: Wed, 8 Jul 2009 10:29:34 +0200 Message-ID: <200907081029.34527.andres@anarazel.de> References: <200907031326.21822.andres@anarazel.de> <200907071811.27570.andres@anarazel.de> <20090708080852.GC3148@ami.dom.local> Mime-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Cc: Joao Correia , Arun R Bharadwaj , Thomas Gleixner , Stephen Hemminger , netdev@vger.kernel.org, LKML To: Jarek Poplawski Return-path: Received: from mail.anarazel.de ([217.115.131.40]:34346 "EHLO smtp.anarazel.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756768AbZGHI3i (ORCPT ); Wed, 8 Jul 2009 04:29:38 -0400 In-Reply-To: <20090708080852.GC3148@ami.dom.local> Sender: netdev-owner@vger.kernel.org List-ID: On Wednesday 08 July 2009 10:08:52 Jarek Poplawski wrote: > On Tue, Jul 07, 2009 at 06:11:27PM +0200, Andres Freund wrote: > > On Tuesday 07 July 2009 15:57:42 Jarek Poplawski wrote: > > > On Tue, Jul 07, 2009 at 03:34:07PM +0200, Andres Freund wrote: > > > ... > > > > > > > Testing wether its triggerable inside a vm might be interesting... > > > > > > Probably similarly to testing without this patch or even less. Maybe > > > I should've warned you but this type of bugs in -rc with possible > > > memory or stack overwrites might be fatal for your data (at least). > > > > Fortunately all the data on that machine should either be replaceable or > > regularly backuped. > > > > Will test later today if that patch bugs. > > If you didn't start yet, it would be nice to use this, btw: > > CONFIG_HOTPLUG_CPU = N > CONFIG_DEBUG_OBJECTS = Y > CONFIG_DEBUG_OBJECTS_TIMERS = Y So I should test with a single cpu? Or is there a config where HOTPLUG_CPU does not imply !SMP? Andres