From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1422706AbWGJRDK (ORCPT ); Mon, 10 Jul 2006 13:03:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1422704AbWGJRDK (ORCPT ); Mon, 10 Jul 2006 13:03:10 -0400 Received: from atlrel6.hp.com ([156.153.255.205]:13494 "EHLO atlrel6.hp.com") by vger.kernel.org with ESMTP id S1422702AbWGJRDI (ORCPT ); Mon, 10 Jul 2006 13:03:08 -0400 From: Bjorn Helgaas To: KAMEZAWA Hiroyuki Subject: Re: [PATCH] remove empty node at boot time Date: Mon, 10 Jul 2006 11:03:03 -0600 User-Agent: KMail/1.8.3 Cc: linux-ia64@vger.kernel.org, tony.luck@intel.com, linux-kernel@vger.kernel.org, akpm@osdl.org References: <20060601200436.6bf7c4e5.kamezawa.hiroyu@jp.fujitsu.com> <200607092038.41053.bjorn.helgaas@hp.com> <20060710141903.424ba3db.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <20060710141903.424ba3db.kamezawa.hiroyu@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200607101103.03849.bjorn.helgaas@hp.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sunday 09 July 2006 23:19, KAMEZAWA Hiroyuki wrote: > Could you try this patch ? (against 2.6.18-rc1) Your patch does fix it. But I'm worried about removing empty nodes at boot-time. I want to support the following scenario: node 0: 1 enabled CPU, 3 disabled CPUs, no local memory node 1: 4 disabled CPUs, no local memory node 2: no CPUs, big interleaved memory across nodes 0 & 1 At run-time, I'd like to be able to enable any or all of the 7 disabled CPUs. If you remove the "empty" node 1 at boot-time, it sounds like I won't be able to enable its CPUs later. Bjorn