admin-guide/mm/memory-hotplug.rst

140 make use of that memory: the memory block has to be "online".
145 The Linux kernel can be configured to automatically online added memory blocks
160 	% echo online > /sys/devices/system/memory/memoryXXX/state
164 	% echo 1 > /sys/devices/system/memory/memoryXXX/online
179 be "online". If it fails, the state of the memory block will remain unchanged
189 The configured auto-online behavior can be observed via::
193 Auto-onlining can be enabled by writing ``online``, ``online_kernel`` or
196 	% echo online > /sys/devices/system/memory/auto_online_blocks
198 Similarly to manual onlining, with ``online`` the kernel will select the
201 Modifying the auto-online behavior will only affect all subsequently added
211   DLPAR on ppc64 ignores the ``offline`` setting and will still online added
235 	% echo 0 > /sys/devices/system/memory/memoryXXX/online
250 The state (online/offline/going-offline) of a memory block can be observed
257 	% cat /sys/devices/system/memory/memoryXXX/online
259 For an online memory block, the managing zone can be observed via::
267 hot(un)plug and interact with memory blocks, especially, to online them.
338 ``online``	    read-write: simplified interface to trigger onlining /
351 		    When writing, ``online``, ``offline``, ``online_kernel`` and
357                     ``online`` let's the kernel select the zone automatically.
359 		    When reading, ``online``, ``offline`` and ``going-offline``
362 ``valid_zones``     read-only: when a block is online, shows the zone it
366 		    For online memory blocks, ``DMA``, ``DMA32``, ``Normal``,
405 			 using the ``contig-zones`` online policy. When
461 				 online policy was configured and memory was
462 				 online, the policy should not be changed
506 				 online policy. Whether the ratio applies only
538 				 online policy also applies per NUMA