Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751514AbaKGJpl (ORCPT ); Fri, 7 Nov 2014 04:45:41 -0500 Received: from cn.fujitsu.com ([59.151.112.132]:15558 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1751229AbaKGJpi (ORCPT ); Fri, 7 Nov 2014 04:45:38 -0500 X-IronPort-AV: E=Sophos;i="5.04,848,1406563200"; d="scan'208";a="43017511" From: Tang Chen To: , , , , , , , , , , , , , , , , , , , , CC: , , , Subject: [PATCH v2 0/2] Fix node meminfo and zoneinfo corruption. Date: Fri, 7 Nov 2014 17:44:39 +0800 Message-ID: <1415353481-3140-1-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 in memory hot-add progress: 1. When hot-adding a node without onlining any page, node meminfo 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, node2 zoneinfo and node3 meminfo 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, should be 0 */ Node 3 MemUsed: 0 kB ...... # cat /proc/zoneinfo ...... Node 2, zone Movable ...... spanned 8388608 present 16777216 /* corrupted, should be 8388608 */ managed 8388608 Change log v1 -> v2: 1. Replace patch 2/2 with a new one. It provides the simplest way to fix problem 2. Tang Chen (2): mem-hotplug: Reset node managed pages when hot-adding a new pgdat. mem-hotplug: Reset node present pages when hot-adding a new pgdat. include/linux/bootmem.h | 1 + mm/bootmem.c | 9 +++++---- mm/memory_hotplug.c | 24 ++++++++++++++++++++++++ mm/nobootmem.c | 8 +++++--- 4 files changed, 35 insertions(+), 7 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/