Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751214AbWIRWSw (ORCPT ); Mon, 18 Sep 2006 18:18:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751936AbWIRWSw (ORCPT ); Mon, 18 Sep 2006 18:18:52 -0400 Received: from wx-out-0506.google.com ([66.249.82.228]:46268 "EHLO wx-out-0506.google.com") by vger.kernel.org with ESMTP id S1751214AbWIRWSw (ORCPT ); Mon, 18 Sep 2006 18:18:52 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:mime-version:content-type:content-transfer-encoding:content-disposition; b=gcfurgsjTPu0Nb2dZPDHnkwgipB6VaMbTf3lsZfGJQMkgBtiJsXIBNuQxC2QxTKJbvdl0tPFktl5YYOaRykrhQ6HIMBzsJJ81B4dVzcbGYQFMrG1YAMaM6FfK0VWMk3CYQgQ9XrOGBGor7URR6MCs26EimRg/WBWPQRH+rojDQ0= Message-ID: <9a8748490609181518j2d12e4f0l2c55e755e40d38c2@mail.gmail.com> Date: Tue, 19 Sep 2006 00:18:51 +0200 From: "Jesper Juhl" To: "Linux Kernel Mailing List" Subject: Math-emu kills the kernel on Athlon64 X2 Cc: billm@melbpc.org.au, billm@suburbia.net, "Linus Torvalds" MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1124 Lines: 27 Hi, If I enable the math emulator in 2.6.18-rc7-git2 (only version I've tried this with) and then boot the kernel with "no387" then I only get as far as lilo's "...Booting the kernel." message and then the system hangs. The kernel is a 32bit kernel build for K8 and my CPU is a Athlon64 X2 4400+ If I boot the same kernel without the "no387" option, then it boots and runs just fine, so it seems the math emulator code is lethal on newer CPU's :-( Now, I need some help debugging this. The crash happens very early and doesn't result in anything printed to the screen (I guess it's too early to call printk()) - How on earth can I get a lead on what's going wrong? Any help would be appreciated. -- Jesper Juhl Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html Plain text mails only, please http://www.expita.com/nomime.html - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/