From owner-freebsd-current@FreeBSD.ORG Sun Jun 17 07:39:42 2007 Return-Path: X-Original-To: freebsd-current@freebsd.org Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id E404D16A41F for ; Sun, 17 Jun 2007 07:39:42 +0000 (UTC) (envelope-from youshi10@u.washington.edu) Received: from mxout5.cac.washington.edu (mxout5.cac.washington.edu [140.142.32.135]) by mx1.freebsd.org (Postfix) with ESMTP id BF1D813C457 for ; Sun, 17 Jun 2007 07:39:42 +0000 (UTC) (envelope-from youshi10@u.washington.edu) Received: from smtp.washington.edu (smtp.washington.edu [140.142.33.9] (may be forged)) by mxout5.cac.washington.edu (8.13.7+UW06.06/8.13.7+UW07.05) with ESMTP id l5H7dbBL000483 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Sun, 17 Jun 2007 00:39:37 -0700 X-Auth-Received: from [192.168.10.45] (c-24-10-12-194.hsd1.ca.comcast.net [24.10.12.194]) (authenticated authid=youshi10) by smtp.washington.edu (8.13.7+UW06.06/8.13.7+UW07.03) with ESMTP id l5H7date019898 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Sun, 17 Jun 2007 00:39:37 -0700 Message-ID: <4674E538.90002@u.washington.edu> Date: Sun, 17 Jun 2007 00:39:36 -0700 From: Garrett Cooper User-Agent: Thunderbird 2.0.0.4 (Windows/20070604) MIME-Version: 1.0 To: freebsd-current@freebsd.org References: <20070617024935.GU4602@funkthat.com> <20070616.211257.1585999818.imp@bsdimp.com> <20070617053746.GV4602@funkthat.com> <20070616.235659.-1947354616.imp@bsdimp.com> <20070617071303.GG12027@obelix.dsto.defence.gov.au> <4674E3B4.5030103@u.washington.edu> In-Reply-To: <4674E3B4.5030103@u.washington.edu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-PMX-Version: 5.3.1.294258, Antispam-Engine: 2.5.1.298604, Antispam-Data: 2007.6.17.2633 X-Uwash-Spam: Gauge=IIIIIII, Probability=7%, Report='__CT 0, __CTE 0, __CT_TEXT_PLAIN 0, __HAS_MSGID 0, __MIME_TEXT_ONLY 0, __MIME_VERSION 0, __SANE_MSGID 0, __USER_AGENT 0' Subject: Re: kernel panic with pccard insert on recent 7.0 CURRENT X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 17 Jun 2007 07:39:43 -0000 Garrett Cooper wrote: > Wilkinson, Alex wrote: >> 0n Sat, Jun 16, 2007 at 11:56:59PM -0600, M. Warner Losh wrote: >> >Yes. I'm pretty sure that's wrong. All ISA and PC Card devices >> use >> >edge triggered interrupts. Also, it is inefficient for level >> >triggered interrupts, since two interrupt sources on the same >> >interrupt may trigger at about the same time... >> >> What is meant by "edge triggered interrupts" ? >> >> -aW >> > I'd assume 'edge triggered interrupts' mean interrupts which occur > on some sort of clock edge, most likely dealing with a clock base > required for setup, or predefined by the designers for some other reason. > -Garrett If the previous email was just noise (thought it might be after the fact), think of "edge triggered interrupts" as something that was designed to occur periodically in order to meet a precondition :). Traditional interrupts can be asynchronous, whereas this edge triggered interrupts are synchronous with a clock signal of some kind (more like polling I think). Hopefully that clarifies some things... -Garrett