From owner-freebsd-bugs Fri Apr 18 06:55:30 1997 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.5/8.8.5) id GAA04981 for bugs-outgoing; Fri, 18 Apr 1997 06:55:30 -0700 (PDT) Received: from rocky.mt.sri.com (rocky.mt.sri.com [206.127.76.100]) by freefall.freebsd.org (8.8.5/8.8.5) with ESMTP id GAA04943 for ; Fri, 18 Apr 1997 06:55:25 -0700 (PDT) Received: (from nate@localhost) by rocky.mt.sri.com (8.7.5/8.7.3) id HAA20791; Fri, 18 Apr 1997 07:55:12 -0600 (MDT) Date: Fri, 18 Apr 1997 07:55:12 -0600 (MDT) Message-Id: <199704181355.HAA20791@rocky.mt.sri.com> From: Nate Williams MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit To: Bob Bishop Cc: KATO Takenori , freebsd-bugs@freefall.freebsd.org Subject: Re: kern/3292: Cyrix 486 performance problem In-Reply-To: References: <199704172240.PAA11576@freefall.freebsd.org> <199704180204.LAA03835@gneiss.eps.nagoya-u.ac.jp> X-Mailer: VM 6.27 under 19.15 XEmacs Lucid Sender: owner-bugs@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk > >Because Cyrix sold 486SLC/DLC series as `up-grade products', I > >considered that FreeBSD should support old motherboard users and > >disable CPU cache by default[etc] > > Consider the possibilities: if it won't run FreeBSD with the cache enabled, > then either: > a) It won't run DOS either - motherboard just too broken No, it'll run DOS just fine, since context switches don't occur in DOS, and rarely in Windows. (Win95 stresses it a bit more, but it *may* still work, no guarantees). Just because it runs under DOS doesn't mean it ain't broken. I can show you *hundreds* of emails over the last 4-5 years that can testify to that. It's only been in the last year that motherboards/caches work 'out of the box' for the majority of motherboards, mostly due to the widespread acceptance of Win95, which is more picky about the hardware than previous M$ OS's. Nate