From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932361AbWDZSpN (ORCPT ); Wed, 26 Apr 2006 14:45:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932370AbWDZSpN (ORCPT ); Wed, 26 Apr 2006 14:45:13 -0400 Received: from smtp.osdl.org ([65.172.181.4]:47557 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S932361AbWDZSpL (ORCPT ); Wed, 26 Apr 2006 14:45:11 -0400 Date: Wed, 26 Apr 2006 11:47:37 -0700 From: Andrew Morton To: Christoph Lameter Cc: axboe@suse.de, linux-kernel@vger.kernel.org, npiggin@suse.de, linux-mm@kvack.org Subject: Re: Lockless page cache test results Message-Id: <20060426114737.239806a2.akpm@osdl.org> In-Reply-To: References: <20060426135310.GB5083@suse.de> <20060426095511.0cc7a3f9.akpm@osdl.org> <20060426174235.GC5002@suse.de> <20060426111054.2b4f1736.akpm@osdl.org> X-Mailer: Sylpheed version 1.0.0 (GTK+ 1.2.10; i386-vine-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Christoph Lameter wrote: > > On Wed, 26 Apr 2006, Andrew Morton wrote: > > > OK. That doesn't sound like something which a real application is likely > > to do ;) > > A real application scenario may be an application that has lots of threads > that are streaming data through multiple different disk channels (that > are able to transfer data simultanouesly. e.g. connected to different > nodes in a NUMA system) into the same address space. > > Something like the above is fairly typical for multimedia filters > processing large amounts of data. >>From the same file? To /dev/null?