From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752153AbbJHCV0 (ORCPT ); Wed, 7 Oct 2015 22:21:26 -0400 Received: from szxga01-in.huawei.com ([58.251.152.64]:10037 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751039AbbJHCVZ (ORCPT ); Wed, 7 Oct 2015 22:21:25 -0400 Message-ID: <5615D311.5030908@huawei.com> Date: Thu, 8 Oct 2015 10:21:05 +0800 From: Xishi Qiu User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:12.0) Gecko/20120428 Thunderbird/12.0.1 MIME-Version: 1.0 To: Andrew Morton , Yasuaki Ishimatsu , Mel Gorman , "David Rientjes" , Tang Chen , CC: Linux MM , LKML Subject: [PATCH] mm: skip if required_kernelcore is larger than totalpages Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.177.25.179] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If kernelcore was not specified, or the kernelcore size is zero (required_movablecore >= totalpages), or the kernelcore size is larger than totalpages, there is no ZONE_MOVABLE. We should fill the zone with both kernel memory and movable memory. Signed-off-by: Xishi Qiu --- mm/page_alloc.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index af3c9bd..6a6da0d 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -5674,8 +5674,11 @@ static void __init find_zone_movable_pfns_for_nodes(void) required_kernelcore = max(required_kernelcore, corepages); } - /* If kernelcore was not specified, there is no ZONE_MOVABLE */ - if (!required_kernelcore) + /* + * If kernelcore was not specified or kernelcore size is larger + * than totalpages, there is no ZONE_MOVABLE. + */ + if (!required_kernelcore || required_kernelcore >= totalpages) goto out; /* usable_startpfn is the lowest possible pfn ZONE_MOVABLE can be at */ -- 2.0.0