From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andi Kleen Subject: Re: CONFIG_ACPI_HOTPLUG_MEMORY=m with x86_64 devel tree Date: 23 Mar 2006 01:07:59 +0100 Message-ID: <20060323000759.GB71469@muc.de> References: <20060321222332.1a037c8e.akpm@osdl.org> <20060322192804.E490.Y-GOTO@jp.fujitsu.com> <20060322030208.30e3581e.akpm@osdl.org> <20060322203220.6433e697.kamezawa.hiroyu@jp.fujitsu.com> <20060322192134.GA44212@muc.de> <20060323082732.9828ca2f.kamezawa.hiroyu@jp.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from colin.muc.de ([193.149.48.1]:23049 "EHLO mail.muc.de") by vger.kernel.org with ESMTP id S932543AbWCWAIF (ORCPT ); Wed, 22 Mar 2006 19:08:05 -0500 Date: Thu, 23 Mar 2006 01:07:59 +0100 Content-Disposition: inline In-Reply-To: <20060323082732.9828ca2f.kamezawa.hiroyu@jp.fujitsu.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: KAMEZAWA Hiroyuki Cc: akpm@osdl.org, y-goto@jp.fujitsu.com, linux-acpi@vger.kernel.org, tony.luck@intel.com On Thu, Mar 23, 2006 at 08:27:32AM +0900, KAMEZAWA Hiroyuki wrote: > On 22 Mar 2006 20:21:34 +0100 > Andi Kleen wrote: > > > > It includes add-new-zone/rebuild-zonelist...etc patches, which will be necessary > > > also for x86_64, even if it's not NUMA. > > > > Hmm? x86_64 supports NUMA systems. > > > Ah, I know. > I wrote "even if.." just because we cannot reserve mem_map for not exisiting node. Hmm actually I haven't tested it but in theory the reserve hotplug code should just work if you list the new nodes already in SRAT as empty hotplug PXMs. Ok there is no code yet to add hotplug cpus to specific nodes later but that would be easy to add. The only problem is that mem_map has to be in another node so it will be slightly slower. -Andi