Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 17 Nov 2000 23:40:34 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 17 Nov 2000 23:40:24 -0500 Received: from neon-gw.transmeta.com ([209.10.217.66]:39692 "EHLO neon-gw.transmeta.com") by vger.kernel.org with ESMTP id ; Fri, 17 Nov 2000 23:40:11 -0500 To: linux-kernel@vger.kernel.org From: torvalds@transmeta.com (Linus Torvalds) Subject: Re: Freeze on FPU exception with Athlon Date: 17 Nov 2000 20:10:01 -0800 Organization: Transmeta Corporation Message-ID: <8v4vep$15d$1@penguin.transmeta.com> In-Reply-To: <20001118014019.18006.qmail@web3404.mail.yahoo.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org In article <20001118014019.18006.qmail@web3404.mail.yahoo.com>, =?iso-8859-1?q?Markus=20Schoder?= wrote: >The following small program (linked against glibc 2.1.3) reliably >freezes my system (Athlon Thunderbird CPU) with at least kernels >2.4.0-test10 and 2.4.0-test11-pre5. Even the SysRq keys do not work >after the freeze. > >Older kernels (e.g. 2.3.40) seem to work. Any Ideas? It certainly doesn't happen for me on any of the machines I work with, but it wouldn't compile as-is for me, so I exchanged the FPU setting with a simpler asm("fldcw %0": :"m" (0)); which should do the equivalent (ie unmask divide by zero errors). Does that make a difference for you? Can you try to figure out where it started happening? Ie try test9 and back too, to figure out what might be bringing it on... I sure as hell hope this isn't an Athlon issue. Can other people try the test-program and see if we have a pattern (ie "it happens only on Athlons", or "Linus is on drugs and it happens for everybody else"). Thanks, Linus - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/