From owner-freebsd-hackers Fri Mar 5 9:49:45 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from smtp01.primenet.com (smtp01.primenet.com [206.165.6.131]) by hub.freebsd.org (Postfix) with ESMTP id 4D60D151C5 for ; Fri, 5 Mar 1999 09:49:40 -0800 (PST) (envelope-from tlambert@usr06.primenet.com) Received: (from daemon@localhost) by smtp01.primenet.com (8.8.8/8.8.8) id KAA06585; Fri, 5 Mar 1999 10:49:21 -0700 (MST) Received: from usr06.primenet.com(206.165.6.206) via SMTP by smtp01.primenet.com, id smtpd006547; Fri Mar 5 10:49:17 1999 Received: (from tlambert@localhost) by usr06.primenet.com (8.8.5/8.8.5) id KAA08647; Fri, 5 Mar 1999 10:49:15 -0700 (MST) From: Terry Lambert Message-Id: <199903051749.KAA08647@usr06.primenet.com> Subject: Re: lockf and kernel threads To: hasty@rah.star-gate.com (Amancio Hasty) Date: Fri, 5 Mar 1999 17:49:15 +0000 (GMT) Cc: dyson@iquest.net, tlambert@primenet.com, dick@tar.com, jplevyak@inktomi.com, hackers@FreeBSD.ORG In-Reply-To: <199903050606.WAA65635@rah.star-gate.com> from "Amancio Hasty" at Mar 4, 99 10:06:54 pm X-Mailer: ELM [version 2.4 PL25] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > I supposed that for a limited distinct events signals are really cool. No, they aren't. Signals are persistant conditions, not events. Otherwise I would be able to count them accurately. Right now, I can be counting one of them, queue another of the same signal, and all subsequent signals of that type are dropped on the floor. > If you can deliver a signal there is nothing to stop you from > delivering an AST provided that one can muster up the queuing > delivery mechanism which is not that much different than the > beloved old fashion signal delivery mechanism. Actually, AST's run in a mode between supervisor and user. The x86 handles this (the infrequently used "ring 1" and "ring 2", but other processor architectures do not. Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message