On 2014/11/7 17:44, Tang Chen wrote: > 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(-) > Hi Tang, How about cc stable ? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>