Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763266AbXEQBL6 (ORCPT ); Wed, 16 May 2007 21:11:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1762745AbXEQBLu (ORCPT ); Wed, 16 May 2007 21:11:50 -0400 Received: from smtp2.linux-foundation.org ([207.189.120.14]:33800 "EHLO smtp2.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1762733AbXEQBLu (ORCPT ); Wed, 16 May 2007 21:11:50 -0400 Date: Wed, 16 May 2007 18:10:13 -0700 (PDT) From: Linus Torvalds To: Christian cc: linux-kernel@vger.kernel.org Subject: Re: 2.6.22-rc1 does not boot on VIA C3_2 cause of X86_CMPXCHG64 In-Reply-To: <464B9D2C.7040704@cv-sv.de> Message-ID: References: <464B9D2C.7040704@cv-sv.de> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1017 Lines: 34 On Thu, 17 May 2007, Christian wrote: > > my small VIA C3_2 box does not boot with 2.6.22-rc1. > It even does not uncompress the kernel. > > The configuration as M386 M486 works. But M586 + MVIAC3_2 > does not work. Ahh, from the EPIA HOWTO: 13.2. Is the C3 Pentium compatible? Yes. But Samuel 2, Ezra, Ezra T C3 processors have a problem with the cmpxchg8b (i.e. CMOV) opcode. Nehemiah and Antaur processors are not affected. However, that would imply that you don't have a VIA C3-2 (Nehamiah) at all, but the older original CyrixIII/VIA C3. Can you check? The Nehemian (C3-2) should be model 9 or greater. So afaik, you should use MCYRIXIII, and make _that_ be the one that disables the use of the cmpxchg8b instruction. Can you please verify? Linus - 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/