From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1031385AbXDZSHf (ORCPT ); Thu, 26 Apr 2007 14:07:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754904AbXDZSHf (ORCPT ); Thu, 26 Apr 2007 14:07:35 -0400 Received: from netops-testserver-4-out.sgi.com ([192.48.171.29]:52419 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754860AbXDZSHe (ORCPT ); Thu, 26 Apr 2007 14:07:34 -0400 Date: Thu, 26 Apr 2007 11:07:33 -0700 (PDT) From: Christoph Lameter X-X-Sender: clameter@schroedinger.engr.sgi.com To: "Eric W. Biederman" cc: David Chinner , Nick Piggin , linux-kernel@vger.kernel.org, Mel Gorman , William Lee Irwin III , Jens Axboe , Badari Pulavarty , Maxim Levitsky Subject: Re: [00/17] Large Blocksize Support V3 In-Reply-To: Message-ID: References: <20070424222105.883597089@sgi.com> <46303A98.9000605@yahoo.com.au> <20070426063830.GE32602149@melbourne.sgi.com> 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 On Thu, 26 Apr 2007, Eric W. Biederman wrote: > Ok. Now why are high end hardware manufacturers building crippled > hardware? Or is there only an 8bit field in SCSI for describing > scatter gather entries? Although I would think this would be > move of a controller ranter than a drive issue. They do not share your definition of "crippled" and would rather say that Linux is crippled OS because it cannot support large physical block size I/O. > The change the fundamental fragmentation avoidance algorithm of the > OS. Use only one size of page. That is a huge problem. No its no problem at all. Its in some peoples head that have never seen it done otherwise. We have another OS here that has dealt with variable sized pages for ages and our people have been shaking their heads for years about these strong opinious that lead us not dealing with the problem.