Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757887AbZGFIPa (ORCPT ); Mon, 6 Jul 2009 04:15:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757719AbZGFIPF (ORCPT ); Mon, 6 Jul 2009 04:15:05 -0400 Received: from mail-fx0-f218.google.com ([209.85.220.218]:40504 "EHLO mail-fx0-f218.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756996AbZGFIPD (ORCPT ); Mon, 6 Jul 2009 04:15:03 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; b=C/UwgwIu93/DnX+bGhLVhNFpsb11gZlUZAktDZ6hLpIZDX6Zxj30qmgDLYJ6ZStcko XSGIMfOcgURLzeNBNs8VvqTD4YEu2doMJHgTyIMpKO7cflrTYdeZqM6Rz7GRv7cTcQnR ctXf9H/8w+YCxLq1kf5C7ctfzQL6J8jmQ+OH4= Date: Mon, 6 Jul 2009 10:14:32 +0200 From: Jarek Poplawski To: Joao Correia Cc: Andres Freund , Arun R Bharadwaj , Thomas Gleixner , Stephen Hemminger , netdev@vger.kernel.org, LKML Subject: Re: Soft-Lockup/Race in networking in 2.6.31-rc1+195 ( possibly?caused by netem) Message-ID: <20090706081432.GA3065@ami.dom.local> References: <200907031326.21822.andres@anarazel.de> <20090704151855.GA21896@ami.dom.local> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1449 Lines: 44 On Mon, Jul 06, 2009 at 05:53:51AM +0100, Joao Correia wrote: > Hello Hi, > System freezes immediatly after grub, no init processing at all, after > applying those patches on top of vanilla 2.6.30 on my box. > > Also, 2nd patch, this piece: > > +#ifdef CONFIG_SCHED_DEBUG > +static inline unsigned int get_sysctl_timer_migration(void) > +{ > + return sysctl_timer_migration; > +} > +#else > +static inline unsigned int get_sysctl_timer_migration(void) > +{ > + return 1; > +} > +#endif > > doesnt work on top of 2.6.30. It complains, while compiling, that > sysctl_timer_migration is not defined. So i just replaced that call > with return 1, like on the not debug case. Hope this doesnt defeat > your test case, but it wouldnt compile otherwise. Probably that was > just introduced after 2.6.30? Yes, it would be too easy if it had worked just like this... (I only test-compiled it, without such warnings, but without CONFIG_SCHED_DEBUG.) I'll look at this again. > > (Have also tried latest .31-rc2, original bug still exists.) Btw., could you send your .config? Do you have lockdep enabled (if so did you try without it)? Is it 'a real' box or something virtual? Thanks, Jarek P. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/