From owner-freebsd-current Fri Feb 8 22:40:22 2002 Delivered-To: freebsd-current@freebsd.org Received: from rwcrmhc52.attbi.com (rwcrmhc52.attbi.com [216.148.227.88]) by hub.freebsd.org (Postfix) with ESMTP id 9D2C137B41A; Fri, 8 Feb 2002 22:40:19 -0800 (PST) Received: from InterJet.elischer.org ([12.232.206.8]) by rwcrmhc52.attbi.com (InterMail vM.4.01.03.27 201-229-121-127-20010626) with ESMTP id <20020209064019.XOYI1147.rwcrmhc52.attbi.com@InterJet.elischer.org>; Sat, 9 Feb 2002 06:40:19 +0000 Received: from localhost (localhost.elischer.org [127.0.0.1]) by InterJet.elischer.org (8.9.1a/8.9.1) with ESMTP id WAA05471; Fri, 8 Feb 2002 22:23:49 -0800 (PST) Date: Fri, 8 Feb 2002 22:23:48 -0800 (PST) From: Julian Elischer To: bde@freebsd.org Cc: FreeBSD current users Subject: "fast" interrupt handler threads. Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Bruce, for the low-level impared such as myself, can you give a quick precis on teh difference between "fast" interrupt handlers in -current and 'normal' interrupt handlers. Do fast interrupt handlers enter through "trap()" ? if they interrupt a user process, do they take on the cred of the running thread? do they return via doreti() on returning do they check for ASTs and run userret()? I have seen the answers to some of these questions in the code, but I'd like to get a more 'english' explanation from someone who seems to understand them.. Julian To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message