From owner-freebsd-hackers Sat Nov 8 13:54:05 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id NAA25895 for hackers-outgoing; Sat, 8 Nov 1997 13:54:05 -0800 (PST) (envelope-from owner-freebsd-hackers) Received: from marcos.networkcs.com (marcos.networkcs.com [137.66.16.1]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id NAA25890 for ; Sat, 8 Nov 1997 13:54:02 -0800 (PST) (envelope-from alk@subtle.east.sun.com) Received: from uc.msc.edu (uc.msc.edu [137.66.1.3]) by marcos.networkcs.com (8.8.7/8.8.7) with ESMTP id PAA28150; Sat, 8 Nov 1997 15:53:54 -0600 (CST) Received: from pobox.com (fergus-27.dialup.prtel.com [206.10.99.158]) by uc.msc.edu (8.8.7/8.8.7) with ESMTP id PAA04536; Sat, 8 Nov 1997 15:53:44 -0600 (CST) Received: (from alk@localhost) by pobox.com (8.8.7/8.7.3) id OAA17326; Sat, 8 Nov 1997 14:30:51 -0600 (CST) Date: Sat, 8 Nov 1997 14:30:51 -0600 (CST) Reply-To: alk@subtle.east.sun.com Message-Id: <199711082030.OAA17326@pobox.com> From: Tony Kimball MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Face: O9M"E%K;(f-Go/XDxL+pCxI5*gr[=FN@Y`cl1.Tn To: jas@flyingfox.com Cc: hackers@freebsd.org Subject: Re: Newest Pentium bug (fatal) X-Mailer: VM 6.33 under 19.14 XEmacs Lucid Sender: owner-freebsd-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk ! Compared with the aforementioned ! floating-point bug, this seems like a much bigger deal. No, the FP bug was infinitely worse, because it would silently give wrong answers. You could crash the Thai Bhat by accident with an old Pentium chip. In this case, the machine is locked -- no one is going to misinterpret that. Indeed, a non-broken compiler would never emit the code. This is no worse than running Windows on a computer without the bug, right? In both cases, pathological code can lock the machine. And millions run Windows voluntarily -- or at least don't try hard enough to not run Windows in order to overcome the coercivity of the environment.