From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f47.google.com (mail-pa0-f47.google.com [209.85.220.47]) by kanga.kvack.org (Postfix) with ESMTP id 738EA280011 for ; Fri, 31 Oct 2014 05:46:26 -0400 (EDT) Received: by mail-pa0-f47.google.com with SMTP id kx10so7395970pab.34 for ; Fri, 31 Oct 2014 02:46:26 -0700 (PDT) Received: from heian.cn.fujitsu.com ([59.151.112.132]) by mx.google.com with ESMTP id rp11si8932289pab.22.2014.10.31.02.46.24 for ; Fri, 31 Oct 2014 02:46:25 -0700 (PDT) From: Tang Chen Subject: [PATCH 0/2] Fix node meminfo corruption. Date: Fri, 31 Oct 2014 17:46:50 +0800 Message-ID: <1414748812-22610-1-git-send-email-tangchen@cn.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain Sender: owner-linux-mm@kvack.org List-ID: To: akpm@linux-foundation.org, santosh.shilimkar@ti.com, grygorii.strashko@ti.com, yinghai@kernel.org, isimatu.yasuaki@jp.fujitsu.co, fabf@skynet.be, nzimmer@sgi.com, wangnan0@huawei.com, vdavydov@parallels.com, toshi.kani@hp.com, phacht@linux.vnet.ibm.com, tj@kernel.org, kirill.shutemov@linux.intel.com, riel@redhat.com, luto@amacapital.net, hpa@linux.intel.com, aarcange@redhat.com, qiuxishi@huawei.com, mgorman@suse.de, rientjes@google.com, hannes@cmpxchg.org Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, tangchen@cn.fujitsu.com 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, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org