Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751206AbWHHCGP (ORCPT ); Mon, 7 Aug 2006 22:06:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751208AbWHHCGP (ORCPT ); Mon, 7 Aug 2006 22:06:15 -0400 Received: from fgwmail7.fujitsu.co.jp ([192.51.44.37]:40428 "EHLO fgwmail7.fujitsu.co.jp") by vger.kernel.org with ESMTP id S1751206AbWHHCGO (ORCPT ); Mon, 7 Aug 2006 22:06:14 -0400 Date: Tue, 8 Aug 2006 11:08:55 +0900 From: KAMEZAWA Hiroyuki To: kmannth@us.ibm.com Cc: akpm@osdl.org, discuss@x86-64.org, ak@suse.de, linux-kernel@vger.kernel.org, lhms-devel@lists.sourceforge.net Subject: Re: [Lhms-devel] [PATCH 1/10] hot-add-mem x86_64: acpi motherboard fix Message-Id: <20060808110855.b3a004a5.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <1154998617.5790.31.camel@keithlap> References: <20060804131351.21401.4877.sendpatchset@localhost.localdomain> <20060805145137.aad34b44.kamezawa.hiroyu@jp.fujitsu.com> <1154975968.5790.16.camel@keithlap> <20060808093110.f7b2ae04.kamezawa.hiroyu@jp.fujitsu.com> <1154998617.5790.31.camel@keithlap> Organization: Fujitsu X-Mailer: Sylpheed version 2.2.0 (GTK+ 2.6.10; i686-pc-mingw32) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 834 Lines: 24 On Mon, 07 Aug 2006 17:56:56 -0700 keith mannthey wrote: > I know of no x86_64 hardware the supports empty node hot-add memory. If > it exists I would recommend using SPARSEMEM based hot-add. On HW I am > aware of there is always some memory present in a node at boot. > > O.K one more. I know x86_64 has ZONE_DMA32. A system boot with only memory below 4G has no avilable memory in ZONE_NORMAL. If a new memory above 4G is added, ZONE_NORMAL comes as *new* zone. ZONE_NORMAL is empty at boot, so it's not in zonelist at boot. is this not problem ? -Kame - 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/