From mboxrd@z Thu Jan 1 00:00:00 1970 From: Soeren Sonnenburg Subject: Re: 2.6.25-rc8: WARNING: at net/ipv4/tcp_input.c:2173 tcp_mark_head_lost+0x11d/0x150() Date: Sat, 05 Apr 2008 20:14:43 +0200 Message-ID: <1207419283.4597.12.camel@localhost> References: <1207199456.7616.3.camel@localhost> <1207230008.4513.14.camel@localhost> <1207413634.4597.4.camel@localhost> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Linux Kernel , Netdev To: Ilpo =?ISO-8859-1?Q?J=E4rvinen?= Return-path: Received: from nn7.de ([85.214.94.156]:46746 "EHLO nn7.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751533AbYDESPI convert rfc822-to-8bit (ORCPT ); Sat, 5 Apr 2008 14:15:08 -0400 In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: On Sat, 2008-04-05 at 20:52 +0300, Ilpo J=E4rvinen wrote: > On Sat, 5 Apr 2008, Soeren Sonnenburg wrote: >=20 > > On Fri, 2008-04-04 at 21:51 +0300, Ilpo J=E4rvinen wrote: > > > On Thu, 3 Apr 2008, Soeren Sonnenburg wrote: > > >=20 > > > > On Thu, 2008-04-03 at 16:26 +0300, Ilpo J=E4rvinen wrote: > > > > > On Thu, 3 Apr 2008, Soeren Sonnenburg wrote: > > > > >=20 > > > > > > trying to download things, I am seeing this (ignore the tai= nted, it is > > > > > > from madwifi and although the module is loaded the device w= as never > > > > > > used) > > > > > >=20 > > > > > > Could anyone make sense of this please? [...] > > >=20 > > > Here's a debug patch which expensively verifies TCP's state in a = number > > > of places during ACK to find first spot where the actual bug occu= rs. > >=20 > > OK I am getting this now as the first spot: > >=20 > > P: 4 L: 2 vs 2 S: 0 vs 3 F: 0 vs 0 w: 4023500226-4023505874 (0) > > skb 0 f495c180 > > skb 1 f480a180 > > skb 2 f4994600 > > head 3 f495c780 > > skb 4 f5b32480 > > TCP wq(s) LL < > > WARNING: at net/ipv4/tcp_ipv4.c:240 tcp_verify_wq+0x319/0x3c0() > > > > another one: > > WARNING: at net/ipv4/tcp_output.c:1475 __tcp_push_pending_frames+0x= 70/0x830() > >=20 > >=20 > > P: 4 L: 2 vs 2 S: 0 vs 3 F: 0 vs 0 w: 4023500226-4023505874 (0) > > skb 0 f495c180 > > skb 1 f480a180 > > skb 2 f4994600 > > head 3 f495c780 > > skb 4 f5b32480 > > TCP wq(s) LL < > > TCP wq(h) +-++< > > l2 s3 f0 p4 seq: su4023500226 hs241530103 sn4023505874 > > ------------[ cut here ]------------ > > WARNING: at net/ipv4/tcp_ipv4.c:240 tcp_verify_wq+0x319/0x3c0() >=20 > Please don't cut the log! It is caught here because 2+3 > 4 :-) but I= need=20 > the full log with stacktraces this time to figure it out. Look here=20 http://nn7.de/debugging/tcp.log :-) HTH, Soeren