Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757535AbXFSQ6w (ORCPT ); Tue, 19 Jun 2007 12:58:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1759736AbXFSQ6o (ORCPT ); Tue, 19 Jun 2007 12:58:44 -0400 Received: from calculon.skynet.ie ([193.1.99.88]:57136 "EHLO calculon.skynet.ie" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759722AbXFSQ6n (ORCPT ); Tue, 19 Jun 2007 12:58:43 -0400 Date: Tue, 19 Jun 2007 17:58:41 +0100 To: Christoph Lameter Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, kamezawa.hiroyu@jp.fujitsu.com Subject: Re: [PATCH 0/7] Memory Compaction v2 Message-ID: <20070619165841.GG17109@skynet.ie> References: <20070618092821.7790.52015.sendpatchset@skynet.skynet.ie> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.13 (2006-08-11) From: mel@skynet.ie (Mel Gorman) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1383 Lines: 28 On (18/06/07 10:24), Christoph Lameter didst pronounce: > On Mon, 18 Jun 2007, Mel Gorman wrote: > > > The patchset implements memory compaction for the page allocator reducing > > external fragmentation so that free memory exists as fewer, but larger > > contiguous blocks. Instead of being a full defragmentation solution, > > this focuses exclusively on pages that are movable via the page migration > > mechanism. > > We need an additional facility at some point that allows the moving of > pages that are not on the LRU. Such support seems to be possible > for page table pages and slab pages. Agreed. When I put this together first, I felt I would be able to isolate pages of different types on migratelist but that is not the case as migration would not be able to tell the difference between a LRU page and a pagetable page. I'll rename cc->migratelist to cc->migratelist_lru with the view to potentially adding cc->migratelist_pagetable or cc->migratelist_slab later. -- Mel Gorman Part-time Phd Student Linux Technology Center University of Limerick IBM Dublin Software Lab - 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/