Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263465AbTEIVMo (ORCPT ); Fri, 9 May 2003 17:12:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263467AbTEIVMo (ORCPT ); Fri, 9 May 2003 17:12:44 -0400 Received: from h-68-165-86-241.DLLATX37.covad.net ([68.165.86.241]:63581 "EHLO sol.microgate.com") by vger.kernel.org with ESMTP id S263465AbTEIVMa (ORCPT ); Fri, 9 May 2003 17:12:30 -0400 Subject: Re: 2.5.69 Interrupt Latency From: Paul Fulghum To: Arnd Bergmann Cc: "linux-kernel@vger.kernel.org" In-Reply-To: <200305092109.h49L9TvW023069@post.webmailer.de> References: <20030507162013$0b67@gated-at.bofh.it> <20030507195008$71e6@gated-at.bofh.it> <20030507224009$4228@gated-at.bofh.it> <20030508140022$2498@gated-at.bofh.it> <20030508193016$1083@gated-at.bofh.it> <20030509182012$49f0@gated-at.bofh.it> <20030509204010$3c9b@gated-at.bofh.it> <200305092109.h49L9TvW023069@post.webmailer.de> Content-Type: text/plain Organization: Message-Id: <1052515524.2024.17.camel@diemos> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.2.2 (1.2.2-4) Date: 09 May 2003 16:25:24 -0500 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1478 Lines: 50 On Fri, 2003-05-09 at 16:06, Arnd Bergmann wrote: > Paul Fulghum wrote: > > > One machine (server) was using usb-uhci and > > the other (laptop) was using usb-ohci. > > > > So it looks like something with USB in 2.5.68-bk11 > > The change below was part of 2.5.68-bk11, and adds a 20ms > delay to the uhci interrupt handler. Could that be > the culprit? Possibly, I can try backing out just that part. To complicate matters, this is happening on 2 machines: a server and a laptop. I disabled USB on the laptop (2.5.69) and the problem is still there :-( I am confident about these results: 1. On the server, bk10 and earlier works, bk11 and later breaks. 2. On the server, bk11 with USB breaks, bk11 without USB works. 3. On the laptop, 2.5.68 and earlier works, 2.5.69 breaks I need to test the laptop with the bk10/bk11 sets to see if this follows the results on the server. Maybe disabling/enabling USB is just triggering something else in the configuration file. I'm leaving for the weekend now, and will try to get back to this on Monday. -- Paul Fulghum, paulkf@microgate.com Microgate Corporation, http://www.microgate.com -- Paul Fulghum, paulkf@microgate.com Microgate Corporation, http://www.microgate.com - 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/