The state (online/offline/going-offline) of a memory block can be observed
either via::
- % cat /sys/device/system/memory/memoryXXX/state
+ % cat /sys/devices/system/memory/memoryXXX/state
Or alternatively (1/0) via::
- % cat /sys/device/system/memory/memoryXXX/online
+ % cat /sys/devices/system/memory/memoryXXX/online
For an online memory block, the managing zone can be observed via::
- % cat /sys/device/system/memory/memoryXXX/valid_zones
+ % cat /sys/devices/system/memory/memoryXXX/valid_zones
Configuring Memory Hot(Un)Plug
==============================
holes cannot be offlined.
For example, assume 1 GiB memory block size. A device for a memory starting at
-0x100000000 is ``/sys/device/system/memory/memory4``::
+0x100000000 is ``/sys/devices/system/memory/memory4``::
(0x100000000 / 1Gib = 4)