Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762070AbXEQGSR (ORCPT ); Thu, 17 May 2007 02:18:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752277AbXEQGSH (ORCPT ); Thu, 17 May 2007 02:18:07 -0400 Received: from mx1.redhat.com ([66.187.233.31]:43657 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754790AbXEQGSG (ORCPT ); Thu, 17 May 2007 02:18:06 -0400 Date: Thu, 17 May 2007 02:17:08 -0400 From: Dave Jones To: Linus Torvalds Cc: "H. Peter Anvin" , Christian , linux-kernel@vger.kernel.org Subject: Re: 2.6.22-rc1 does not boot on VIA C3_2 cause of X86_CMPXCHG64 Message-ID: <20070517061708.GL30166@redhat.com> Mail-Followup-To: Dave Jones , Linus Torvalds , "H. Peter Anvin" , Christian , linux-kernel@vger.kernel.org References: <464B9D2C.7040704@cv-sv.de> <464BAF07.9020003@cv-sv.de> <464BC67F.7080707@zytor.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.2i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1144 Lines: 31 On Wed, May 16, 2007 at 08:16:11PM -0700, Linus Torvalds wrote: > > > On Wed, 16 May 2007, H. Peter Anvin wrote: > > > > It gets turned on by the code in arch/i386/kernel/cpu. It's just that > > the new code that Andi added runs during setup, i.e. in real mode, so > > *way* earlier than that. > > Ahh. Do we really need it that early? > > Now, it's easy enough to just turn off CONFIG_X86_CMPXCHG64 (it really > should be "8B" instead of "64", but that's another issue) for those > things, and nobody should really care, but still, maybe we could re-do the > early bits to be more polite to those VIA CPU's? > > I thought the cmpxchg8b stuff was just used to page table setup. Do those > things even _support_ PAE? newer models do, yes. Even NX. In fact, primarily for NX. I've not heard of anyone running >4GB with a Nehemiah. Dave -- http://www.codemonkey.org.uk - 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/