Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754202AbXHJEPr (ORCPT ); Fri, 10 Aug 2007 00:15:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750926AbXHJEPj (ORCPT ); Fri, 10 Aug 2007 00:15:39 -0400 Received: from mail.tmr.com ([64.65.253.246]:60785 "EHLO gaimboi.tmr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750756AbXHJEPi (ORCPT ); Fri, 10 Aug 2007 00:15:38 -0400 Message-ID: <46BBE6D9.1080904@tmr.com> Date: Fri, 10 Aug 2007 00:17:29 -0400 From: Bill Davidsen User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.8) Gecko/20061105 SeaMonkey/1.0.6 MIME-Version: 1.0 To: Andi Kleen CC: richard kennedy , Peter Zijlstra , linux-mm@kvack.org, linux-kernel@vger.kernel.org, miklos@szeredi.hu, akpm@linux-foundation.org, neilb@suse.de, dgc@sgi.com, tomoki.sekiyama.qu@hitachi.com, nikita@clusterfs.com, trond.myklebust@fys.uio.no, yingchao.zhou@gmail.com, torvalds@linux-foundation.org Subject: Re: [PATCH 00/23] per device dirty throttling -v8 References: <20070803123712.987126000@chello.nl> <1186575947.3106.23.camel@castor.rsk.org> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1157 Lines: 26 Andi Kleen wrote: > richard kennedy writes: >> This is on a standard desktop machine so there are lots of other >> processes running on it, and although there is a degree of variability >> in the numbers,they are very repeatable and your patch always out >> performs the stock mm2. >> looks good to me > > iirc the goal of this is less to get better performance, but to avoid long user visible > latencies. Of course if it's faster it's great too, but that's only secondary. > What a trade-off, if you want to get rid of long latency you have to live with better throughput. I can live with that. ;-) Your point well taken, not the intent of the patch, but it may indicate where a performance bottleneck happens as well. -- Bill Davidsen "We have more to fear from the bungling of the incompetent than from the machinations of the wicked." - from Slashdot - 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/