Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1765731AbXHDVJ5 (ORCPT ); Sat, 4 Aug 2007 17:09:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760053AbXHDVJs (ORCPT ); Sat, 4 Aug 2007 17:09:48 -0400 Received: from adsl-70-250-156-241.dsl.austtx.swbell.net ([70.250.156.241]:44029 "EHLO gw.microgate.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758134AbXHDVJr (ORCPT ); Sat, 4 Aug 2007 17:09:47 -0400 Message-ID: <46B4F8AD.3000405@microgate.com> Date: Sat, 04 Aug 2007 16:07:41 -0600 From: Paul Fulghum User-Agent: Thunderbird 2.0.0.6 (Windows/20070728) MIME-Version: 1.0 To: Lee Howard CC: Ray Lee , Tilman Schmidt , Alan Cox , Robert Hancock , linux-serial@vger.kernel.org, tytso@mit.edu, rmk@arm.linux.org.uk, linux-kernel@vger.kernel.org Subject: Re: serial flow control appears broken References: <46A84B4A.6070902@shaw.ca> <46A8C6F1.4080309@howardsilvan.com> <20070726173121.70088a92@the-village.bc.nu> <46A98845.8010806@howardsilvan.com> <46A9F712.70706@imap.cc> <46D33636.7070200@microgate.com> <46AA5A0E.1050600@howardsilvan.com> <1185578908.2989.15.camel@x2> <46AACB4D.7080004@howardsilvan.com> <2c0942db0707280941n1b9e1f7i9c0de332286e8aac@mail.gmail.com> <46B4C393.4020506@howardsilvan.com> In-Reply-To: <46B4C393.4020506@howardsilvan.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 895 Lines: 23 Lee Howard wrote: > And in repeat tests it is quite evident that IDE disk activity is, > indeed, at least part of the problem. As IDE disk activity increases an > increased amount of data coming in on the serial port goes missing. Lee, you mentioned 2.2.x kernels did not exhibit this problem. Was this on the same hardware you are currently testing? Which 2.2.x version were you using? Was the 2.2.x serial driver also identifying the UART as a 16550A? Can you get /proc/interrupts output from both the current setup and the 2.2.x setup? It would be interesting to compare the interrupt assignment and UART setup between the versions. -- Paul - 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/