From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763339AbZE0MuU (ORCPT ); Wed, 27 May 2009 08:50:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1762492AbZE0MuG (ORCPT ); Wed, 27 May 2009 08:50:06 -0400 Received: from ganesha.gnumonks.org ([213.95.27.120]:38486 "EHLO ganesha.gnumonks.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759634AbZE0MuG (ORCPT ); Wed, 27 May 2009 08:50:06 -0400 Date: Wed, 27 May 2009 14:47:36 +0200 From: Harald Welte To: "Michael S. Zick" Cc: "H. Peter Anvin" , Ingo Molnar , Thomas Gleixner , linux-kernel@vger.kernel.org, Alan Cox Subject: Re: [VIA Support] was: [BUG FIX] Make x86_32 uni-processor Atomic ops, Atomic Message-ID: <20090527124736.GU4024@prithivi.gnumonks.org> References: <200905221139.26941.lkml@morethan.org> <4A188A48.5000208@zytor.com> <20090524064905.GH20452@prithivi.gnumonks.org> <200905270718.11093.lkml@morethan.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200905270718.11093.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 On Wed, May 27, 2009 at 07:18:08AM -0500, Michael S. Zick wrote: > On Sun May 24 2009, Harald Welte wrote: > > > > Once I understand it in full detail, I can talk to the right people inside > > CentaurLabs (VIA's CPU division). > > > > If somebody (optionally) can phrase a precise technical question that I can > > directly forward to somebody with low-level x86 knowledge but no Linux background, > > it would definitely help speeding up the process. > > > > What is the PCI Cache Line size in the CX700? In the CN896? The chipset documentation doesn't say anything about that, I'd have to inquire inside VIA. I doubt any difference between CX700/CN896. Also, setting the PCI config space register to a too small cache line size (such as 32) on a system that supports more (say 64) doesn't really cause any problems, but just reduces performance - as far as I know. Setting it too big will cause trouble. But since 32 is the default and only on AMD and Intel CPU's it is increased, I see no issue here either. -- - Harald Welte http://linux.via.com.tw/ ============================================================================ VIA Free and Open Source Software Liaison