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-rw-r--r--mm/Kconfig13
1 files changed, 12 insertions, 1 deletions
diff --git a/mm/Kconfig b/mm/Kconfig
index 71259e0..278e3ab 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -149,7 +149,18 @@ config MOVABLE_NODE
depends on NO_BOOTMEM
depends on X86_64
depends on NUMA
- depends on BROKEN
+ default n
+ help
+ Allow a node to have only movable memory. Pages used by the kernel,
+ such as direct mapping pages cannot be migrated. So the corresponding
+ memory device cannot be hotplugged. This option allows users to
+ online all the memory of a node as movable memory so that the whole
+ node can be hotplugged. Users who don't use the memory hotplug
+ feature are fine with this option on since they don't online memory
+ as movable.
+
+ Say Y here if you want to hotplug a whole node.
+ Say N here if you want kernel to use memory on all nodes evenly.
# eventually, we can have this option just 'select SPARSEMEM'
config MEMORY_HOTPLUG
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