Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751173AbWHHCPS (ORCPT ); Mon, 7 Aug 2006 22:15:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751208AbWHHCPS (ORCPT ); Mon, 7 Aug 2006 22:15:18 -0400 Received: from e36.co.us.ibm.com ([32.97.110.154]:27806 "EHLO e36.co.us.ibm.com") by vger.kernel.org with ESMTP id S1751173AbWHHCPQ (ORCPT ); Mon, 7 Aug 2006 22:15:16 -0400 Subject: Re: [Lhms-devel] [PATCH 1/10] hot-add-mem x86_64: acpi motherboard fix From: keith mannthey Reply-To: kmannth@us.ibm.com To: KAMEZAWA Hiroyuki Cc: andrew , discuss , lhms-devel , Andi Kleen , lkml In-Reply-To: <20060808110855.b3a004a5.kamezawa.hiroyu@jp.fujitsu.com> 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> <20060808110855.b3a004a5.kamezawa.hiroyu@jp.fujitsu.com> Content-Type: text/plain Organization: Linux Technology Center IBM Date: Mon, 07 Aug 2006 19:15:07 -0700 Message-Id: <1155003308.5790.44.camel@keithlap> Mime-Version: 1.0 X-Mailer: Evolution 2.0.4 (2.0.4-4) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1133 Lines: 31 On Tue, 2006-08-08 at 11:08 +0900, KAMEZAWA Hiroyuki wrote: > 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 ? Perhaps in this situation you could run into trouble. I am not sure if I can put my hardware into this config but I will try. Thanks for taking a look at these patches and the reserve path. Thanks, Keith - 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/