Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S970596AbXILRH1 (ORCPT ); Wed, 12 Sep 2007 13:07:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S970531AbXILRGw (ORCPT ); Wed, 12 Sep 2007 13:06:52 -0400 Received: from netops-testserver-3-out.sgi.com ([192.48.171.28]:45511 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S968378AbXILRGv (ORCPT ); Wed, 12 Sep 2007 13:06:51 -0400 Date: Wed, 12 Sep 2007 10:06:49 -0700 (PDT) From: Christoph Lameter X-X-Sender: clameter@schroedinger.engr.sgi.com To: KAMEZAWA Hiroyuki cc: Mel Gorman , Lee.Schermerhorn@hp.com, akpm@linux-foundation.org, ak@suse.de, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH 4/6] Embed zone_id information within the zonelist->zones pointer In-Reply-To: <20070912165138.5deb4db4.kamezawa.hiroyu@jp.fujitsu.com> Message-ID: References: <20070911213006.23507.19569.sendpatchset@skynet.skynet.ie> <20070911213127.23507.34058.sendpatchset@skynet.skynet.ie> <20070912165138.5deb4db4.kamezawa.hiroyu@jp.fujitsu.com> 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 Content-Length: 654 Lines: 13 On Wed, 12 Sep 2007, KAMEZAWA Hiroyuki wrote: > If we really want to avoid unnecessary access to "zone" while walking zonelist, > above may do something good. Cons is this makes sizeof zonlist bigger. The trouble is that the size of the zonelist would double with this approach. We have long zonelists and doubling the size could double the cachelines needed to be touched in order to scan the zonelists. - 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/