From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752107AbcHHCvT (ORCPT ); Sun, 7 Aug 2016 22:51:19 -0400 Received: from szxga02-in.huawei.com ([119.145.14.65]:6914 "EHLO szxga02-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751989AbcHHCvS (ORCPT ); Sun, 7 Aug 2016 22:51:18 -0400 From: zhongjiang To: CC: , Subject: [PATCH] mm: fix the incorrect hugepages count Date: Mon, 8 Aug 2016 10:49:06 +0800 Message-ID: <1470624546-902-1-git-send-email-zhongjiang@huawei.com> X-Mailer: git-send-email 1.7.12.4 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.175.102.37] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020202.57A7F3A1.0071,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0, ip=0.0.0.0, so=2013-06-18 04:22:30, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: c3b773baf83193b88baa7f7ad349cc58 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: zhong jiang when memory hotplug enable, free hugepages will be freed if movable node offline. therefore, /proc/sys/vm/nr_hugepages will be incorrect. The patch fix it by reduce the max_huge_pages when the node offline. Signed-off-by: zhong jiang --- mm/hugetlb.c | 1 + 1 file changed, 1 insertion(+) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index f904246..3356e3a 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1448,6 +1448,7 @@ static void dissolve_free_huge_page(struct page *page) list_del(&page->lru); h->free_huge_pages--; h->free_huge_pages_node[nid]--; + h->max_huge_pages--; update_and_free_page(h, page); } spin_unlock(&hugetlb_lock); -- 1.8.3.1