From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932274Ab2IMX6T (ORCPT ); Thu, 13 Sep 2012 19:58:19 -0400 Received: from LGEMRELSE1Q.lge.com ([156.147.1.111]:44064 "EHLO LGEMRELSE1Q.lge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759117Ab2IMX6R (ORCPT ); Thu, 13 Sep 2012 19:58:17 -0400 X-AuditID: 9c93016f-b7c19ae000000e6d-8a-50527317490b Date: Fri, 14 Sep 2012 09:00:28 +0900 From: Minchan Kim To: Rik van Riel Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Mel Gorman , Andrew Morton Subject: Re: [PATCH -mm] enable CONFIG_COMPACTION by default Message-ID: <20120914000028.GC5085@bbox> References: <20120913162104.1458bea2@cuia.bos.redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20120913162104.1458bea2@cuia.bos.redhat.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-Brightmail-Tracker: AAAAAA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Rik, On Thu, Sep 13, 2012 at 04:21:04PM -0400, Rik van Riel wrote: > Now that lumpy reclaim has been removed, compaction is the > only way left to free up contiguous memory areas. It is time > to just enable CONFIG_COMPACTION by default. > > Signed-off-by: Rik van Riel I tried this a few month ago and Mel had a concern on size bloating (compaction.o + migration.o) where system doesn't use higher order allocation. Now that I think about it, admin should configure carefully and manually if he has a size concern of vmlinux without depending auto-generating config. So I really want this. Acked-by: Minchan Kim -- Kind regards, Minchan Kim