Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757708AbXFSP7t (ORCPT ); Tue, 19 Jun 2007 11:59:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1759987AbXFSP7f (ORCPT ); Tue, 19 Jun 2007 11:59:35 -0400 Received: from calculon.skynet.ie ([193.1.99.88]:52069 "EHLO calculon.skynet.ie" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759943AbXFSP7e (ORCPT ); Tue, 19 Jun 2007 11:59:34 -0400 Date: Tue, 19 Jun 2007 16:59:32 +0100 To: Christoph Lameter Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, kamezawa.hiroyu@jp.fujitsu.com Subject: Re: [PATCH 2/7] Allow CONFIG_MIGRATION to be set without CONFIG_NUMA Message-ID: <20070619155932.GC17109@skynet.ie> References: <20070618092821.7790.52015.sendpatchset@skynet.skynet.ie> <20070618092901.7790.31240.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: 1556 Lines: 41 On (18/06/07 10:04), Christoph Lameter didst pronounce: > On Mon, 18 Jun 2007, Mel Gorman wrote: > > > > > CONFIG_MIGRATION currently depends on CONFIG_NUMA. move_pages() is the only > > user of migration today and as this system call is only meaningful on NUMA, > > it makes sense. However, memory compaction will operate within a zone and is > > There are more user of migration. move_pages is one of them, then there is > cpuset process migration, MPOL_BIND page migration and sys_migrate_pages > for explicit process migration. Ok, this was poor phrasing. Each of those features are NUMA related even though the core migration mechanism is not dependant on NUMA. > > > useful on both NUMA and non-NUMA systems. This patch allows CONFIG_MIGRATION > > to be used in all memory models. To preserve existing behaviour, move_pages() > > is only available when CONFIG_NUMA is set. > > What does this have to do with memory models? A bit unclear. > More poor phrasing. It would have been clearer to simply say that the patch allows CONFIG_MIGRATION to be used without NUMA. > Otherwise > > Acked-by: Christoph Lameter Thanks -- 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/