From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932552AbYEGWKV (ORCPT ); Wed, 7 May 2008 18:10:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753273AbYEGWJq (ORCPT ); Wed, 7 May 2008 18:09:46 -0400 Received: from ogre.sisk.pl ([217.79.144.158]:34935 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1762504AbYEGWJm (ORCPT ); Wed, 7 May 2008 18:09:42 -0400 From: "Rafael J. Wysocki" To: Andrew Morton Subject: Re: sparc64 bootup regression... Date: Thu, 8 May 2008 00:09:45 +0200 User-Agent: KMail/1.9.6 (enterprise 20070904.708012) Cc: David Miller , linux-kernel@vger.kernel.org, y-goto@jp.fujitsu.com References: <20080429.231241.221824292.davem@davemloft.net> <20080429233832.168fb6ee.akpm@linux-foundation.org> In-Reply-To: <20080429233832.168fb6ee.akpm@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200805080009.46012.rjw@sisk.pl> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wednesday, 30 of April 2008, Andrew Morton wrote: > On Tue, 29 Apr 2008 23:12:41 -0700 (PDT) David Miller wrote: > > > > > This commit causes bootup failures on sparc64: > > > > commit 86f6dae1377523689bd8468fed2f2dd180fc0560 > > Author: Yasunori Goto > > Date: Mon Apr 28 02:13:33 2008 -0700 > > > > memory hotplug: allocate usemap on the section with pgdat > > > > Usemaps are allocated on the section which has pgdat by this. > > > > Because usemap size is very small, many other sections usemaps are allocated > > on only one page. If a section has usemap, it can't be removed until removing > > other sections. This dependency is not desirable for memory removing. > > > > Pgdat has similar feature. When a section has pgdat area, it must be the last > > section for removing on the node. So, if section A has pgdat and section B > > has usemap for section A, Both sections can't be removed due to dependency > > each other. > > > > To solve this issue, this patch collects usemap on same section with pgdat. > > If other sections doesn't have any dependency, this section will be able to be > > removed finally. > > Thanks. Does a straightforward revert fix it? If so, we could do that while heads > are being scratched. Has that been reverted already?