Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933139Ab0GOMIR (ORCPT ); Thu, 15 Jul 2010 08:08:17 -0400 Received: from mail-i4.nets.RWTH-Aachen.DE ([137.226.12.21]:55290 "EHLO MAIL-i4.nets.rwth-aachen.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755582Ab0GOMIQ (ORCPT ); Thu, 15 Jul 2010 08:08:16 -0400 X-Greylist: delayed 580 seconds by postgrey-1.27 at vger.kernel.org; Thu, 15 Jul 2010 08:08:16 EDT Message-ID: <4C3EF7EA.2040900@nets.rwth-aachen.de> Date: Thu, 15 Jul 2010 13:58:34 +0200 From: Lennart Schulte User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.10) Gecko/20100527 Thunderbird/3.0.5 MIME-Version: 1.0 To: =?ISO-8859-1?Q?Ilpo_J=E4rvinen?= CC: Tejun Heo , "David S. Miller" , lkml , "netdev@vger.kernel.org" , "Fehrmann, Henning" , Carsten Aulbert , Eric Dumazet Subject: Re: oops in tcp_xmit_retransmit_queue() w/ v2.6.32.15 References: <4C358AAA.9080400@kernel.org> In-Reply-To: Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 735 Lines: 17 I'm testing new reordering algorithms in a virtual testbed, that is the nodes are emulated with xen and all the network parameters can be tuned with queues. With one of the algorithms I also got tracebacks which include tcp_xmit_retransmit_queue. It only happens with ACK loss. The kernel version however is 2.6.31. When I read this thread I tried the debug patch and got the following: [ 2754.413150] NULL head, pkts 0 [ 2754.413156] Errors caught so far 1 Hope that is of any help. -- 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/