From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932280AbWDCEub (ORCPT ); Mon, 3 Apr 2006 00:50:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932325AbWDCEub (ORCPT ); Mon, 3 Apr 2006 00:50:31 -0400 Received: from mail19.syd.optusnet.com.au ([211.29.132.200]:22661 "EHLO mail19.syd.optusnet.com.au") by vger.kernel.org with ESMTP id S932280AbWDCEua (ORCPT ); Mon, 3 Apr 2006 00:50:30 -0400 From: Con Kolivas To: ck@vds.kolivas.org Subject: Re: [ck] Re: lowmem_reserve question Date: Mon, 3 Apr 2006 14:50:18 +1000 User-Agent: KMail/1.9.1 Cc: Mike Galbraith , Nick Piggin , linux list , Andrew Morton References: <200604021401.13331.kernel@kolivas.org> <1144039366.8198.2.camel@homer> <200604031448.01391.kernel@kolivas.org> In-Reply-To: <200604031448.01391.kernel@kolivas.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200604031450.19177.kernel@kolivas.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Monday 03 April 2006 14:48, Con Kolivas wrote: > On Monday 03 April 2006 14:42, Mike Galbraith wrote: > > On Mon, 2006-04-03 at 12:48 +1000, Con Kolivas wrote: > > > Furthermore, now that we have the option of up to 3GB lowmem split on > > > 32bit we can have a default lowmem_reserve of almost 12MB (if I'm > > > reading it right) which seems very tight with only 16MB of ZONE_DMA. > > > > I haven't crawled around in the vm for ages, but I think that's only > > 16MB if you support antique cards. > > That's what the ram is used for, but that is all the ZONE_DMA 32bit > machines get 32bit i386 architecture I mean. > , whether you use it for that purpose or not. My concern is > that this will have all sorts of effects on the balancing since it will > always appear almost full. Cheers, Con