Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756302AbXIRLHG (ORCPT ); Tue, 18 Sep 2007 07:07:06 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755155AbXIRLGz (ORCPT ); Tue, 18 Sep 2007 07:06:55 -0400 Received: from lazybastard.de ([212.112.238.170]:52795 "EHLO longford.lazybastard.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754320AbXIRLGy (ORCPT ); Tue, 18 Sep 2007 07:06:54 -0400 Date: Tue, 18 Sep 2007 12:49:49 +0200 From: =?utf-8?B?SsO2cm4=?= Engel To: Mel Gorman Cc: Christoph Lameter , Nick Piggin , Goswin von Brederlow , Andrew Morton , Joern Engel , andrea@suse.de, torvalds@linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Christoph Hellwig , William Lee Irwin III , David Chinner , Jens Axboe , Badari Pulavarty , Maxim Levitsky , Fengguang Wu , swin wang , totty.lu@gmail.com, hugh@veritas.com Subject: Re: [00/41] Large Blocksize Support V7 (adds memmap support) Message-ID: <20070918104948.GA9082@lazybastard.org> References: <20070911060349.993975297@sgi.com> <87ir6c3z2l.fsf@informatik.uni-tuebingen.de> <20070916181313.GA16406@skynet.ie> <200709161903.37295.nickpiggin@yahoo.com.au> <20070918100040.GB2035@skynet.ie> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20070918100040.GB2035@skynet.ie> User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 962 Lines: 25 On Tue, 18 September 2007 11:00:40 +0100, Mel Gorman wrote: > > We still lack data on what sort of workloads really benefit from large > blocks Compressing filesystems like jffs2 and logfs gain better compression ratio with larger blocks. Going from 4KiB to 64KiB gave somewhere around 10% benefit iirc. Testdata was a 128MiB qemu root filesystem. Granted, the same could be achieved by adding some extra code and a few bounce buffers to the filesystem. How suck a hack would perform I'd prefer not to find out, though. :) Jörn -- Write programs that do one thing and do it well. Write programs to work together. Write programs to handle text streams, because that is a universal interface. -- Doug MacIlroy - 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/