From owner-freebsd-hackers Fri Mar 5 10:41:27 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from apollo.backplane.com (apollo.backplane.com [209.157.86.2]) by hub.freebsd.org (Postfix) with ESMTP id CE30A151D4 for ; Fri, 5 Mar 1999 10:41:25 -0800 (PST) (envelope-from dillon@apollo.backplane.com) Received: (from dillon@localhost) by apollo.backplane.com (8.9.3/8.9.1) id KAA49799; Fri, 5 Mar 1999 10:41:07 -0800 (PST) (envelope-from dillon) Date: Fri, 5 Mar 1999 10:41:07 -0800 (PST) From: Matthew Dillon Message-Id: <199903051841.KAA49799@apollo.backplane.com> To: Amancio Hasty Cc: Terry Lambert , dyson@iquest.net, dick@tar.com, jplevyak@inktomi.com, hackers@FreeBSD.ORG Subject: Re: lockf and kernel threads References: <199903051833.KAA82111@rah.star-gate.com> Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG :> rings are ring 0 and ring 3. That's it. The intermediate rings are no :> better then a glorified user mode because most privilaged instructions :> cannot be run in them. : :Thats probably true however for delivery of an AST I don't thing that we :need priviliged instructions --- I could be wrong. : : Amancio Little things like, ohhhhh disabling interrupts. Accessing the MMU registers, flushing the TLB, etc..... believe me, ring 1 and ring 2 is utterly useless for anything FreeBSD wants to run in supervisor mode. Matthew Dillon To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message