From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 6 Aug 2001 11:20:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 6 Aug 2001 11:20:05 -0400 Received: from ebiederm.dsl.xmission.com ([166.70.28.69]:40283 "EHLO flinx.biederman.org") by vger.kernel.org with ESMTP id ; Mon, 6 Aug 2001 11:19:57 -0400 To: Chris Mason Cc: Daniel Phillips , linux-kernel@vger.kernel.org, linux-mm@kvack.org, torvalds@transmeta.com Subject: Re: [RFC] using writepage to start io In-Reply-To: <209120000.997036451@tiny> From: ebiederm@xmission.com (Eric W. Biederman) Date: 06 Aug 2001 09:13:20 -0600 In-Reply-To: <209120000.997036451@tiny> Message-ID: User-Agent: Gnus/5.0808 (Gnus v5.8.8) Emacs/20.5 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 Chris Mason writes: > On Wednesday, August 01, 2001 04:57:35 PM +0200 Daniel Phillips > wrote: > > > On Tuesday 31 July 2001 21:07, Chris Mason wrote: > >> This has been tested a little more now, both ext2 (1k, 4k) and > >> reiserfs. dbench and iozone testing don't show any difference, but I > >> need to spend a little more time on the benchmarks. > > > > It's impressive that such seemingly radical surgery on the vm innards > > is a) possible and b) doesn't make the system perform noticably worse. > > radical surgery is always possible ;-) But, I was expecting better > performance results than I got. I'm trying a few other things out here, > more details will come if they work. Hmm. I would expect that could could entirely avoid the issue of which hash chain to put pages on if you did the block devices in the page cache thing. The the current buffer cache interface becomes just a backwards compatibility layer which should make things cleaner. Eric