From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 20 Dec 2001 17:29:38 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 20 Dec 2001 17:29:29 -0500 Received: from moremagic.merlins.org ([204.80.101.251]:14222 "EHLO mail2.merlins.org") by vger.kernel.org with ESMTP id ; Thu, 20 Dec 2001 17:29:19 -0500 Date: Thu, 20 Dec 2001 14:29:17 -0800 From: Marc MERLIN To: linux-net@vger.kernel.org Cc: linux-kernel@vger.kernel.org Subject: Re: TCP stall between 2.4.14-patched and Win XP ? Message-ID: <20011220142917.A8914@merlins.org> In-Reply-To: <20011220130530.Q16402@merlins.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.3.15i In-Reply-To: <20011220130530.Q16402@merlins.org>; from marc_ln@merlins.org on Thu, Dec 20, 2001 at 01:05:30PM -0800 X-Sysadmin: BOFH X-URL: http://marc.merlins.org/ X-Operating-System: Proudly running Linux 2.4.14-lvm1.0.1rc4-ext3-0.9.15-grsec-1.8.8-servers11/Debian woody X-Mailer: Some Outlooks can't quote properly without this header Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Dec 20, 2001 at 01:05:30PM -0800, Marc MERLIN wrote: > The XP machine connects to the linux box, packets go back and forth, and > when the linux machine starts pushing a lot of data back, XP lowers the TCP > window until the connection stalls. I should have added more details here. I know this looks like a classic issue of the client app not reading its data (netscape mail polling mail over imap in this case). It's just that the same exact app was working fine on the same mail folders on non XP machines, and the same netscape had no issues polling mail from other servers, so I started suspecting something on the TCP layer between the two OSes Mika Liljeberg sent me a mail confirming that it really looks like the client app not reading its data. Of course, I can strace the imap server, but I don't know how to do that with netscape on XP :-) Either way, although I can't confirm it for now, I'll assume that something weird is happening with the app, and that it's indeed responsible for the stall. Sorry for the noise. Marc -- Microsoft is to operating systems & security .... .... what McDonalds is to gourmet cooking Home page: http://marc.merlins.org/ | Finger marc_f@merlins.org for PGP key