Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755410Ab0AVXGO (ORCPT ); Fri, 22 Jan 2010 18:06:14 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755035Ab0AVXGN (ORCPT ); Fri, 22 Jan 2010 18:06:13 -0500 Received: from mail-fx0-f220.google.com ([209.85.220.220]:42326 "EHLO mail-fx0-f220.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754874Ab0AVXGM (ORCPT ); Fri, 22 Jan 2010 18:06:12 -0500 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=fJ82+pluRafg3myIOa5sAh4hh60dNw5ody0JX6KK4T3nv+R0BFwUqsaWp0nGObViA2 7dsZcOJ/5Eb8YEFoKc4TiiKqx/oLNEEh3IjqvSJ8E0HvbxLAbcACcu2yxxCPrrwk5WEc OEx6rt88gZsDHITOWDF6ojzlolfQ5/FmosGSw= Date: Sat, 23 Jan 2010 00:06:05 +0100 From: Jarek Poplawski To: Michael Breuer Cc: David Miller , Stephen Hemminger , akpm@linux-foundation.org, flyboy@gmail.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, Michael Chan , Don Fry , Francois Romieu , Matt Carlson Subject: Re: Hang: 2.6.32.4 sky2/DMAR (was [PATCH] sky2: Fix WARNING: at lib/dma-debug.c:902 check_sync) Message-ID: <20100122230605.GB3105@del.dom.local> References: <20100120094103.GA6225@ff.dom.local> <4B58B217.8030001@majjas.com> <20100121204133.GB3085@del.dom.local> <4B59E7EB.3050605@majjas.com> <20100122215304.GA3105@del.dom.local> <4B5A2362.6000306@majjas.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4B5A2362.6000306@majjas.com> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1927 Lines: 43 On Fri, Jan 22, 2010 at 05:14:58PM -0500, Michael Breuer wrote: > On 1/22/2010 4:53 PM, Jarek Poplawski wrote: > >On Fri, Jan 22, 2010 at 01:01:15PM -0500, Michael Breuer wrote: > >>Kernel 2.6.32.4 (git) with the following patches applied: > >> > >>af_packet.c (tpacket_snd version 3) > >>sky2.c pskb_may_pull > >>sky2 fix WARNING at lib/dma-debug.c check_sync > >I guess, you meant the "sky2.c receive_copy" patch which you tested > >earlier, or at least you managed to crash DMAR with that patch > >before crashing it with Stephen's "lib/dma-debug.c check_sync" patch, > >right? > > > Yes - sorry, correct - all three patches were in the last run. > Previously, I've encountered the crash without these patches. OK, thanks for testing - it's really very helpful, and supports David's opinion that dmar is a different problem. ... > Not sure I can do that. Note that based on the log messages, there > were no errors/dropped packets involving dhcp. Moving the dhcp > server off of the affected machine is not trivial. The dhcp > correlation is based on logged messages preceding each crash. I > cannot confirm that they're related, however it's really suspicious. > If it helps, HP replaced my unmanaged switch with a managed one so I > can see whether there were any switch events logged the next time I > have a crash. > > At this point, it seems the following is required to trigger the crash: > 1) Uptime of 24-36 hours > 2) High RX load on server (cifs traffic is what I've triggered it with). > 3) Normal DHCP traffic. Do you mean you got these crashes with the new switch too, and this switch doesn't drop DHCP at all? (Otherwise, let's try this switch first.) 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/