Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752517AbZFDRuR (ORCPT ); Thu, 4 Jun 2009 13:50:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751220AbZFDRuH (ORCPT ); Thu, 4 Jun 2009 13:50:07 -0400 Received: from ganesha.gnumonks.org ([213.95.27.120]:58670 "EHLO ganesha.gnumonks.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751162AbZFDRuG (ORCPT ); Thu, 4 Jun 2009 13:50:06 -0400 Date: Thu, 4 Jun 2009 19:40:59 +0200 From: Harald Welte To: "Michael S. Zick" Cc: Linus Torvalds , Duane Griffin , Linux Kernel Mailing List Subject: Re: Linux 2.6.30-rc8 [also: VIA Support] Message-ID: <20090604174059.GB9823@prithivi.gnumonks.org> References: <200906041121.30845.lkml@morethan.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200906041121.30845.lkml@morethan.org> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1270 Lines: 28 On Thu, Jun 04, 2009 at 11:21:28AM -0500, Michael S. Zick wrote: > That is one of my pending questions - - > (It is included as a comment at the appropriate point in my patchset.) > > The VIA processors have MCR's not MTRR's - - AFAIK, that was true for processors like the Winhcip / C6, i.e. earlier than the C3. The C3, C7 and later support 8 intel-style MTRR's. > The C7-M processor uses "in-order retirement" not "out-of-order" - - > I think the MCR's **should not** be set for "weak ordered writes" - why would it matter on UP? as indicated, I'm not the expert here, but I thought memory ordering issues only arise in SMP systems [or possibly with regard to DMA, but as we already explored much earlier in this thread, drivers that access DMA buffers whil the hardware owns them are buggy and need to be fixed] Regards, -- - Harald Welte http://linux.via.com.tw/ ============================================================================ VIA Free and Open Source Software Liaison -- 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/