From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: oops in tcp_xmit_retransmit_queue() w/ v2.6.32.15 Date: Thu, 09 Sep 2010 12:27:19 +0200 Message-ID: <4C88B687.60907@kernel.org> References: <4C358AAA.9080400@kernel.org> <4C3EF7EA.2040900@nets.rwth-aachen.de> <1279195528.2496.2.camel@edumazet-laptop> <4C3F053F.7090704@nets.rwth-aachen.de> <4C4467E0.9080907@kernel.org> <4C8764B2.1070509@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Lennart Schulte , Eric Dumazet , "David S. Miller" , "netdev@vger.kernel.org" , "Fehrmann, Henning" , Carsten Aulbert To: =?ISO-8859-1?Q?Ilpo_J=E4rvinen?= Return-path: Received: from hera.kernel.org ([140.211.167.34]:52950 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753916Ab0IIK1m (ORCPT ); Thu, 9 Sep 2010 06:27:42 -0400 In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: Hello, On 09/08/2010 12:34 PM, Ilpo J=E4rvinen wrote: >> Unfortunately, we haven't been able to reproduce the problem anymore= =2E >=20 > With my debug patch or not at all? With the ugly merged patch I posted previously in this thread which contained debug messages if any of the worked around condition triggers. >> It could be (but not likely given that none of the debugging message= s >> is triggering) that I was mistaken and the previously posted fixed t= he >> issue. The network used by the cluster went through some changes at >> the time and there have been issues with packet losses. Given that >> the problem needs packet losses to trigger, it's likely that packet >> loss pattern here changed such that the patterns of packet losses >> which trigger the problem aren't happening anymore. (Carsten, >> Henning, please feel free to fill in if I'm missing something). >=20 > That might well be true, however, you're already a second guy who=20 > cannot reproduce it with the debug patch so I would not rule out othe= r=20 > possibilities unless you've tried without debug patch too since the=20 > changes? Unfortunately, I can't really tell one way or the other at this point. Carsten will be back in a few days. I'll ask him for more details. Thanks. --=20 tejun