The patch titled
Subject: memory-hotplug: document and enable CONFIG_MOVABLE_NODE
has been added to the -mm tree. Its filename is
memory-hotplug-document-and-enable-config_movable_node.patch
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From: Tang Chen <tangchen@xxxxxxxxxxxxxx>
Subject: memory-hotplug: document and enable CONFIG_MOVABLE_NODE
Add help info for CONFIG_MOVABLE_NODE and permit its selection.
This option allows the user to online all memory of a node as movable
memory. So that the whole node can be hotplugged. Users who don't use
the hotplug feature are also fine with this option on since they won't
online memory as movable.
Signed-off-by: Tang Chen <tangchen@xxxxxxxxxxxxxx>
Reviewed-by: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx>
Cc: Lai Jiangshan <laijs@xxxxxxxxxxxxxx>
Cc: Wen Congyang <wency@xxxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/Kconfig | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff -puN mm/Kconfig~memory-hotplug-document-and-enable-config_movable_node mm/Kconfig
--- a/mm/Kconfig~memory-hotplug-document-and-enable-config_movable_node
+++ a/mm/Kconfig
@@ -149,7 +149,17 @@ 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 kernel, such
+ as direct mapping pages can not be migrated. So the corresponding
+ memory device can not be hotpluged. This option allows users to
+ online all the memory of a node as movable memory so that the whole
+ node can be hotpluged. Users who don't use 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
_
Patches currently in -mm which might be from tangchen@xxxxxxxxxxxxxx are
origin.patch
memory-hotplug-document-and-enable-config_movable_node.patch
memory-hotplug-document-and-enable-config_movable_node-fix.patch
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