Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756241AbZGCGUK (ORCPT ); Fri, 3 Jul 2009 02:20:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751743AbZGCGUA (ORCPT ); Fri, 3 Jul 2009 02:20:00 -0400 Received: from mail-fx0-f218.google.com ([209.85.220.218]:48092 "EHLO mail-fx0-f218.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751448AbZGCGT7 (ORCPT ); Fri, 3 Jul 2009 02:19:59 -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=PKztddKgW3OvZXFJsxR2Noow3idD+I/MMhZit1fTwCqfhefgZp6OQ2Z1rKllyxHawD yXvwYMBhhRsYhGavWYnvaDr1PGM1nV6DA1qb7gKao8VP8V7formmho0mJDhU5KCyVU5n 64UrrV7pbETeJ8/EGLmoLGkMovStOED9FFVws= Date: Fri, 3 Jul 2009 06:12:13 +0000 From: Jarek Poplawski To: Andres Freund Cc: 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: <20090703061213.GA4847@ff.dom.local> References: <200907030331.32531.andres@anarazel.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200907030331.32531.andres@anarazel.de> 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: 884 Lines: 22 On Fri, Jul 03, 2009 at 03:31:31AM +0200, Andres Freund wrote: ... > Ok. I finally see the light. I bisected the issue down to > eea08f32adb3f97553d49a4f79a119833036000a : timers: Logic to move non > pinned timers > > Disabling timer migration like provided in the earlier commit stops the > issue from occuring. > > That it is related to timers is sensible in the light of my findings, > that I could trigger the issue only when using delay in netem - that is > the codepath using qdisc_watchdog... Andres, thanks for your work and time. It saved me a lot of searching, because I wasn't able to trigger this on my old box. 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/