From mboxrd@z Thu Jan 1 00:00:00 1970 From: Speedster Subject: Re: [Bugme-new] [Bug 12327] New: Intermittent TCP issues with => 2.6.27 Date: Fri, 09 Jan 2009 00:04:42 +0900 Message-ID: <4966160A.20001@haveacry.com> References: <20081229214101.4c4f5ac1.akpm@linux-foundation.org> <495BFEAF.6000006@haveacry.com> <20090102083402.GA24383@gondor.apana.org.au> <4961ECD2.1000502@haveacry.com> <20090107041732.GA22041@gondor.apana.org.au> <4964B303.4020708@haveacry.com> <20090108030745.GA1204@gondor.apana.org.au> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="------------010400030506050007090503" Cc: =?ISO-8859-1?Q?Ilpo_J=E4rvinen?= , Netdev , bugme-daemon@bugzilla.kernel.org, Andrew Morton To: Herbert Xu Return-path: Received: from hosted05.westnet.com.au ([203.10.1.219]:59857 "EHLO hosted05.westnet.com.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751934AbZAHPEv (ORCPT ); Thu, 8 Jan 2009 10:04:51 -0500 In-Reply-To: <20090108030745.GA1204@gondor.apana.org.au> Sender: netdev-owner@vger.kernel.org List-ID: This is a multi-part message in MIME format. --------------010400030506050007090503 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Herbert Xu wrote: > > Can you please take a look at /proc/net/snmp on the host and the > guest to see if IP InDiscards is non-zero? Both are 0 > Also now that we know the problem is definitely in the host/guest > please take another set of dumps on the interfaces leading to and > within the guest to see exactly which path of the system is dropping > the reply. Attached (all are the exact same attempted connection), and reveal some interesting information. The path the inbound traffic should take is 1. vlan50 (host) 2. tap interface vnet3 (host) / eth0 (guest) 3. ppp0 (guest) It looks as though when it is sent out the tap interface the payload length is incorrect in the PPPoE section of the frame. When it arrives via vlan50 it appears fine. Or at least that's what wireshark highlights for me :) Dean --------------010400030506050007090503 Content-Type: application/octet-stream; name="whimper-vlan50.cap" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="whimper-vlan50.cap" 1MOyoQIABAAAAAAAAAAAAP//AAABAAAACBJmSXf1DgBSAAAAUgAAAAAYGFQZVAAWPiT3oYhk EQBMBwA+ACFFEAA8VGNAAEAGy33KSKLjEZWcCoE7AFDl2+XCAAAAAKACFrAXxAAAAgQFrAQC CAr//7GhAAAAAAEDAwQJEmZJCsADAEQAAABEAAAAABY+JPehABgYVBlUiGQRAEwHADAAIUUA ACzH0wAA6QbvLBGVnArKSKLjAFCBO2/q2cfl2+XDYBIf/sZ3AAACBAWsAAALEmZJtdQOAFIA AABSAAAAABgYVBlUABY+JPehiGQRAEwHAD4AIUUQADxUZEAAQAbLfMpIouMRlZwKgTsAUOXb 5cIAAAAAoAIWsBaYAAACBAWsBAIICv//ss0AAAAAAQMDBAwSZklbeAMARAAAAEQAAAAAFj4k 96EAGBhUGVSIZBEATAcAMAAhRQAALODUAADpBtYrEZWcCspIouMAUIE7b+rZx+Xb5cNgEh/+ xncAAAIEBawAABESZkkV1Q4AUgAAAFIAAAAAGBhUGVQAFj4k96GIZBEATAcAPgAhRRAAPFRl QABABst7ykii4xGVnAqBOwBQ5dvlwgAAAACgAhawFEAAAAIEBawEAggK//+1JQAAAAABAwME EhJmSUh6AwBEAAAARAAAAAAWPiT3oQAYGFQZVIhkEQBMBwAwACFFAAAsLAUAAOkGivsRlZwK ykii4wBQgTtv6tnH5dvlw2ASH/7GdwAAAgQFrAAAHRJmScDVDgBSAAAAUgAAAAAYGFQZVAAW PiT3oYhkEQBMBwA+ACFFEAA8VGZAAEAGy3rKSKLjEZWcCoE7AFDl2+XCAAAAAKACFrAPkAAA AgQFrAQCCAr//7nVAAAAAAEDAwQeEmZJYXgDAEQAAABEAAAAABY+JPehABgYVBlUiGQRAEwH ADAAIUUAACySlwAA6QYkaRGVnArKSKLjAFCBOzoF7r/l2+XDYBIf/udkAAACBAWsAAA= --------------010400030506050007090503 Content-Type: application/octet-stream; name="whimper-vnet3.cap" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="whimper-vnet3.cap" 1MOyoQIABAAAAAAAAAAAAP//AAABAAAACBJmSW31DgBSAAAAUgAAAAAYGFQZVAAWPiT3oYhk EQBMBwA+ACFFEAA8VGNAAEAGy33KSKLjEZWcCoE7AFDl2+XCAAAAAKACFrAXxAAAAgQFrAQC CAr//7GhAAAAAAEDAwQJEmZJGMADAEIAAABCAAAAABY+JPehABgYVBlUiGQRAEwHADAAIUUA ACzH0wAA6QbvLBGVnArKSKLjAFCBO2/q2cfl2+XDYBIf/sZ3AAACBAWsCxJmSaLUDgBSAAAA UgAAAAAYGFQZVAAWPiT3oYhkEQBMBwA+ACFFEAA8VGRAAEAGy3zKSKLjEZWcCoE7AFDl2+XC AAAAAKACFrAWmAAAAgQFrAQCCAr//7LNAAAAAAEDAwQMEmZJaXgDAEIAAABCAAAAABY+JPeh ABgYVBlUiGQRAEwHADAAIUUAACzg1AAA6QbWKxGVnArKSKLjAFCBO2/q2cfl2+XDYBIf/sZ3 AAACBAWsERJmSQLVDgBSAAAAUgAAAAAYGFQZVAAWPiT3oYhkEQBMBwA+ACFFEAA8VGVAAEAG y3vKSKLjEZWcCoE7AFDl2+XCAAAAAKACFrAUQAAAAgQFrAQCCAr//7UlAAAAAAEDAwQSEmZJ U3oDAEIAAABCAAAAABY+JPehABgYVBlUiGQRAEwHADAAIUUAACwsBQAA6QaK+xGVnArKSKLj AFCBO2/q2cfl2+XDYBIf/sZ3AAACBAWsHRJmSbXVDgBSAAAAUgAAAAAYGFQZVAAWPiT3oYhk EQBMBwA+ACFFEAA8VGZAAEAGy3rKSKLjEZWcCoE7AFDl2+XCAAAAAKACFrAPkAAAAgQFrAQC CAr//7nVAAAAAAEDAwQeEmZJb3gDAEIAAABCAAAAABY+JPehABgYVBlUiGQRAEwHADAAIUUA ACySlwAA6QYkaRGVnArKSKLjAFCBOzoF7r/l2+XDYBIf/udkAAACBAWs --------------010400030506050007090503 Content-Type: application/octet-stream; name="whinge-eth0.cap" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="whinge-eth0.cap" 1MOyoQIABAAAAAAAAAAAAP//AAABAAAACBJmSVHwDgBSAAAAUgAAAAAYGFQZVAAWPiT3oYhk EQBMBwA+ACFFEAA8VGNAAEAGy33KSKLjEZWcCoE7AFDl2+XCAAAAAKACFrAXxAAAAgQFrAQC CAr//7GhAAAAAAEDAwQJEmZJMLwDAEIAAABCAAAAABY+JPehABgYVBlUiGQRAEwHADAAIUUA ACzH0wAA6QbvLBGVnArKSKLjAFCBO2/q2cfl2+XDYBIf/sZ3AAACBAWsCxJmSfLODgBSAAAA UgAAAAAYGFQZVAAWPiT3oYhkEQBMBwA+ACFFEAA8VGRAAEAGy3zKSKLjEZWcCoE7AFDl2+XC AAAAAKACFrAWmAAAAgQFrAQCCAr//7LNAAAAAAEDAwQMEmZJWHQDAEIAAABCAAAAABY+JPeh ABgYVBlUiGQRAEwHADAAIUUAACzg1AAA6QbWKxGVnArKSKLjAFCBO2/q2cfl2+XDYBIf/sZ3 AAACBAWsERJmSerODgBSAAAAUgAAAAAYGFQZVAAWPiT3oYhkEQBMBwA+ACFFEAA8VGVAAEAG y3vKSKLjEZWcCoE7AFDl2+XCAAAAAKACFrAUQAAAAgQFrAQCCAr//7UlAAAAAAEDAwQSEmZJ 0HUDAEIAAABCAAAAABY+JPehABgYVBlUiGQRAEwHADAAIUUAACwsBQAA6QaK+xGVnArKSKLj AFCBO2/q2cfl2+XDYBIf/sZ3AAACBAWsHRJmSeTODgBSAAAAUgAAAAAYGFQZVAAWPiT3oYhk EQBMBwA+ACFFEAA8VGZAAEAGy3rKSKLjEZWcCoE7AFDl2+XCAAAAAKACFrAPkAAAAgQFrAQC CAr//7nVAAAAAAEDAwQeEmZJHXMDAEIAAABCAAAAABY+JPehABgYVBlUiGQRAEwHADAAIUUA ACySlwAA6QYkaRGVnArKSKLjAFCBOzoF7r/l2+XDYBIf/udkAAACBAWs --------------010400030506050007090503 Content-Type: application/octet-stream; name="whinge-ppp0.cap" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="whinge-ppp0.cap" 1MOyoQIABAAAAAAAAAAAAP//AABxAAAACBJmSUXwDgBMAAAATAAAAAAEAgAAAAAAAAAAAAAA CABFEAA8VGNAAEAGy33KSKLjEZWcCoE7AFDl2+XCAAAAAKACFrAXxAAAAgQFrAQCCAr//7Gh AAAAAAEDAwQLEmZJ4M4OAEwAAABMAAAAAAQCAAAAAAAAAAAAAAAIAEUQADxUZEAAQAbLfMpI ouMRlZwKgTsAUOXb5cIAAAAAoAIWsBaYAAACBAWsBAIICv//ss0AAAAAAQMDBBESZknXzg4A TAAAAEwAAAAABAIAAAAAAAAAAAAAAAgARRAAPFRlQABABst7ykii4xGVnAqBOwBQ5dvlwgAA AACgAhawFEAAAAIEBawEAggK//+1JQAAAAABAwMEHRJmSdfODgBMAAAATAAAAAAEAgAAAAAA AAAAAAAACABFEAA8VGZAAEAGy3rKSKLjEZWcCoE7AFDl2+XCAAAAAKACFrAPkAAAAgQFrAQC CAr//7nVAAAAAAEDAwQ= --------------010400030506050007090503--