Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755666AbXI3BoD (ORCPT ); Sat, 29 Sep 2007 21:44:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752685AbXI3Bny (ORCPT ); Sat, 29 Sep 2007 21:43:54 -0400 Received: from mx1.redhat.com ([66.187.233.31]:55634 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752544AbXI3Bnx (ORCPT ); Sat, 29 Sep 2007 21:43:53 -0400 Date: Sat, 29 Sep 2007 21:43:14 -0400 From: Dave Jones To: Alan Cox Cc: Nick Piggin , Linux Kernel Mailing List , Linus Torvalds , Andi Kleen Subject: Re: [patch] x86: improved memory barrier implementation Message-ID: <20070930014314.GA12669@redhat.com> Mail-Followup-To: Dave Jones , Alan Cox , Nick Piggin , Linux Kernel Mailing List , Linus Torvalds , Andi Kleen References: <20070928154832.GB12538@wotan.suse.de> <20070928170719.2f617a7a@the-village.bc.nu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070928170719.2f617a7a@the-village.bc.nu> User-Agent: Mutt/1.5.14 (2007-02-12) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1038 Lines: 30 On Fri, Sep 28, 2007 at 05:07:19PM +0100, Alan Cox wrote: > > Winchip: can any of these CPUs with ooostores do SMP? If not, then smp_wmb > > can also be a simple barrier on i386 too. > > The IDT Winchip can do SMP apparently. >From the Winchip3 (which was the final winchip) specs.. "The IDT WinChip 3 processor also omits the software interface to the Intel-proprietary symmetric multiprocessing support: APIC. This bus function is omitted since the target market for the IDT WinChip 3 processor is typical desktop systems (which do not support APIC multiprocessing)." It didn't offer any alternative DIY-SMP either (or at least none that's documented). Centaur only became SMP capable with some of the C3 Nehemiah's a year or two back. 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/