Messages in this thread | | | From | Tang Chen <> | Subject | [PATCH 0/2] Fix node meminfo corruption. | Date | Fri, 31 Oct 2014 17:46:50 +0800 |
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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
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