From owner-freebsd-hackers Mon May 18 04:02:26 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id EAA28531 for freebsd-hackers-outgoing; Mon, 18 May 1998 04:02:26 -0700 (PDT) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from ns2.cetlink.net (ns2.cetlink.net [209.54.54.20]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id EAA28523 for ; Mon, 18 May 1998 04:02:18 -0700 (PDT) (envelope-from jak@cetlink.net) Received: from EXIT10 (i485-gw.cetlink.net [209.198.15.97]) by ns2.cetlink.net (8.8.8/8.8.5) with SMTP id HAA14649; Mon, 18 May 1998 07:01:59 -0400 (EDT) From: jak@cetlink.net (John Kelly) To: Studded Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: Pentium F00F bug Date: Mon, 18 May 1998 11:04:17 GMT Message-ID: <3560142c.148871306@mail.cetlink.net> References: <199805172218.IAA03007@gsms01.alcatel.com.au> <355F9294.580BB181@dal.net> In-Reply-To: <355F9294.580BB181@dal.net> X-Mailer: Forte Agent 1.5/32.451 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by hub.freebsd.org id EAA28524 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Sun, 17 May 1998 18:44:52 -0700, Studded wrote: > When the bug was first described there was wide difference of opinion >on how it "should" be fixed. A more efficient way of doing it would >doubtlessly be a good thing, however given that no one who wanted a >better way to solve the problem has coded it yet, I don't anticipate it >happening any time soon. :) On about 97-12-01 BSDI released a revised F00F patch for BSD/OS 2.1. Someone with a BSD/OS source license could look and see what they did. > >PATCH: > K210-031 > >SUMMARY: > This mod implements a simpler fix to the Intel Pentium and > Pentium/MMX invalid instruction hang. The fix changes the > way the IDT is used by the CPU such that there is no run > time performance penalty, even for the less used interrupts > that were emulated by K210-030. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message