From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753910AbZFDR22 (ORCPT ); Thu, 4 Jun 2009 13:28:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750845AbZFDR2V (ORCPT ); Thu, 4 Jun 2009 13:28:21 -0400 Received: from hera.kernel.org ([140.211.167.34]:47052 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750785AbZFDR2U (ORCPT ); Thu, 4 Jun 2009 13:28:20 -0400 Message-ID: <4A2803D1.4070001@kernel.org> Date: Thu, 04 Jun 2009 10:26:41 -0700 From: Yinghai Lu User-Agent: Thunderbird 2.0.0.19 (X11/20081227) MIME-Version: 1.0 To: Christoph Lameter , Andrew Morton , mingo@elte.hu, mel@csn.ul.ie CC: tglx@linutronix.de, hpa@zytor.com, suresh.b.siddha@intel.com, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk, rusty@rustcorp.com.au, steiner@sgi.com, rientjes@google.com Subject: [PATCH] mm: clear N_HIGH_MEMORY map before se set it again -v4 References: <4A05269D.8000701@kernel.org> <20090512111623.GG25923@csn.ul.ie> <4A0A64FB.4080504@kernel.org> <20090513145950.GB28097@csn.ul.ie> <4A0C4910.7090508@kernel.org> <4A0C4A2A.6080009@kernel.org> <20090514095414.ba8356e5.akpm@linux-foundation.org> <4A0C4F67.5080802@kernel.org> <20090514102554.b3a36f19.akpm@linux-foundation.org> <4A0C563A.3020100@kernel.org> <4A2758CB.9090404@kernel.org> <4A27FAD4.2010104@kernel.org> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org SRAT tables may contains nodes of very small size. The arch code may decide to not activate such a node. However, currently the early boot code sets N_HIGH_MEMORY for such nodes. These nodes therefore seem to be active although these nodes have no present pages. for 64bit N_HIGH_MEMORY == N_NORMAL_MEMORY, so that works for 64 bit too v4: update description according to Christoph Signed-off-by: Yinghai Lu Tested-by: Jack Steiner Acked-by: Christoph Lameter --- mm/page_alloc.c | 5 +++++ 1 file changed, 5 insertions(+) Index: linux-2.6/mm/page_alloc.c =================================================================== --- linux-2.6.orig/mm/page_alloc.c +++ linux-2.6/mm/page_alloc.c @@ -4041,6 +4041,11 @@ void __init free_area_init_nodes(unsigne early_node_map[i].start_pfn, early_node_map[i].end_pfn); + /* + * find_zone_movable_pfns_for_nodes/early_calculate_totalpages init + * that node_mask, clear it at first + */ + nodes_clear(node_states[N_HIGH_MEMORY]); /* Initialise every node */ mminit_verify_pageflags_layout(); setup_nr_node_ids();