From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763705AbXETHKl (ORCPT ); Sun, 20 May 2007 03:10:41 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1759515AbXETHKe (ORCPT ); Sun, 20 May 2007 03:10:34 -0400 Received: from netops-testserver-3-out.sgi.com ([192.48.171.28]:54045 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1759089AbXETHKd (ORCPT ); Sun, 20 May 2007 03:10:33 -0400 Date: Sun, 20 May 2007 00:10:27 -0700 (PDT) From: Christoph Lameter X-X-Sender: clameter@schroedinger.engr.sgi.com To: Fengguang Wu cc: Andrew Morton , linux-kernel@vger.kernel.org, Andi Kleen , Jens Axboe , Oleg Nesterov , Steven Pratt , Ram Pai , "linux-ext4@vger.kernel.org" Subject: Re: [PATCH 1/9] readahead: introduce PG_readahead In-Reply-To: <379630538.31710@ustc.edu.cn> Message-ID: References: <20070516224752.500812933@mail.ustc.edu.cn> <379355695.83536@ustc.edu.cn> <20070518232824.9917d794.akpm@linux-foundation.org> <379577826.15160@ustc.edu.cn> <20070519082504.8baa8d19.akpm@linux-foundation.org> <379630538.31710@ustc.edu.cn> 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 Sun, 20 May 2007, Fengguang Wu wrote: > The reuse code would look like the attached one. > It still needs more testing, and would fail if Christoph reuses > PG_reclaim in higher order pagecache in the future. Do not worry about that. All higher order pagecache patchsets remove that sharing because we will then need these pages on the LRU and thus PG_reclaim cannot be shared anymore.