From owner-freebsd-hackers Sat Dec 9 09:43:00 1995 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id JAA04189 for hackers-outgoing; Sat, 9 Dec 1995 09:43:00 -0800 (PST) Received: from hda.com (hda.com [199.232.40.182]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id JAA04176 for ; Sat, 9 Dec 1995 09:42:43 -0800 (PST) Received: (from dufault@localhost) by hda.com (8.6.11/8.6.9) id MAA21385; Sat, 9 Dec 1995 12:47:03 -0500 From: Peter Dufault Message-Id: <199512091747.MAA21385@hda.com> Subject: Re: ft (QIC 40/80) To: terry@lambert.org (Terry Lambert) Date: Sat, 9 Dec 1995 12:47:02 -0500 (EST) Cc: dietz@cyrix.com, hackers@freebsd.org In-Reply-To: <199512051948.MAA02289@phaeton.artisoft.com> from "Terry Lambert" at Dec 5, 95 12:48:56 pm X-Mailer: ELM [version 2.4 PL24] Content-Type: text Sender: owner-hackers@freebsd.org Precedence: bulk > It's *impossible* to fully support the things without heavy kernel > hacking on timer code and allowing kernel preemption (or buzz-looping). But it is possible to do it with a user filter and our current kernel? I don't have any idea of the issues other than "the beast needs lots of feeding", but I can't see how we can do it with the filter and wouldn't be able to do it in a normal driver. -- Peter Dufault Real Time Machine Control and Simulation HD Associates, Inc. Voice: 508 433 6936 dufault@hda.com Fax: 508 433 5267