Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757829AbaJaJqL (ORCPT ); Fri, 31 Oct 2014 05:46:11 -0400 Received: from cn.fujitsu.com ([59.151.112.132]:52423 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1757029AbaJaJqJ (ORCPT ); Fri, 31 Oct 2014 05:46:09 -0400 X-IronPort-AV: E=Sophos;i="5.04,826,1406563200"; d="scan'208";a="42651890" From: Tang Chen To: , , , , , , , , , , , , , , , , , , , , CC: , Subject: [PATCH 0/2] Fix node meminfo corruption. Date: Fri, 31 Oct 2014 17:46:29 +0800 Message-ID: <1414748791-22557-1-git-send-email-tangchen@cn.fujitsu.com> X-Mailer: git-send-email 1.9.3 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.167.226.71] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org There are two problems when calculating node meminfo: 1. When hot-adding a node without onlining any page, MemTotal corrupted. # hot-add node2 (memory not onlined) # cat /sys/device/system/node/node2/meminfo Node 2 MemTotal: 33554432 kB /* corrupted */ Node 2 MemFree: 0 kB Node 2 MemUsed: 33554432 kB Node 2 Active: 0 kB ...... 2. When onlining memory on node2, MemFree of node3 corrupted. # for ((i = 2048; i < 2064; i++)); do echo online_movable > /sys/devices/system/node/node2/memory$i/state; done # cat /sys/devices/system/node/node2/meminfo Node 2 MemTotal: 33554432 kB Node 2 MemFree: 33549092 kB Node 2 MemUsed: 5340 kB ...... # cat /sys/devices/system/node/node3/meminfo Node 3 MemTotal: 0 kB Node 3 MemFree: 248 kB /* corrupted */ Node 3 MemUsed: 0 kB ...... This patch-set fixes them. Tang Chen (2): mem-hotplug: Reset node managed pages when hot-adding a new pgdat. mem-hotplug: Fix wrong check for zone->pageset initialization in online_pages(). include/linux/bootmem.h | 1 + include/linux/mm.h | 1 + mm/bootmem.c | 9 +++++---- mm/memory_hotplug.c | 15 ++++++++++++++- mm/nobootmem.c | 8 +++++--- mm/page_alloc.c | 5 +++++ 6 files changed, 31 insertions(+), 8 deletions(-) -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/