All are prepared, we can actually introduce N_MEMORY.
add CONFIG_MOVABLE_NODE make we can use it for movable-dedicated node
Signed-off-by: Lai Jiangshan <laijs@xxxxxxxxxxxxxx>
---
drivers/base/node.c | 6 ++++++
include/linux/nodemask.h | 4 ++++
mm/Kconfig | 8 ++++++++
mm/page_alloc.c | 3 +++
4 files changed, 21 insertions(+), 0 deletions(-)
diff --git a/drivers/base/node.c b/drivers/base/node.c
index 31f4805..4bf5629 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -621,6 +621,9 @@ static struct node_attr node_state_attr[] = {
#ifdef CONFIG_HIGHMEM
_NODE_ATTR(has_high_memory, N_HIGH_MEMORY),
#endif
+#ifdef CONFIG_MOVABLE_NODE
+ _NODE_ATTR(has_memory, N_MEMORY),
+#endif
};
static struct attribute *node_state_attrs[] = {
@@ -631,6 +634,9 @@ static struct attribute *node_state_attrs[] = {
#ifdef CONFIG_HIGHMEM
&node_state_attr[4].attr.attr,
#endif
+#ifdef CONFIG_MOVABLE_NODE
+ &node_state_attr[4].attr.attr,
+#endif
NULL
};
diff --git a/include/linux/nodemask.h b/include/linux/nodemask.h
index c6ebdc9..4e2cbfa 100644
--- a/include/linux/nodemask.h
+++ b/include/linux/nodemask.h
@@ -380,7 +380,11 @@ enum node_states {
#else
N_HIGH_MEMORY = N_NORMAL_MEMORY,
#endif
+#ifdef CONFIG_MOVABLE_NODE
+ N_MEMORY, /* The node has memory(regular, high, movable) */
+#else
N_MEMORY = N_HIGH_MEMORY,
+#endif
N_CPU, /* The node has one or more cpus */
NR_NODE_STATES
};
diff --git a/mm/Kconfig b/mm/Kconfig
index 82fed4e..4371c65 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -140,6 +140,14 @@ config ARCH_DISCARD_MEMBLOCK
config NO_BOOTMEM
boolean
+config MOVABLE_NODE
+ boolean "Enable to assign a node has only movable memory"
+ depends on HAVE_MEMBLOCK
+ depends on NO_BOOTMEM
+ depends on X86_64
+ depends on NUMA
+ default y
+
# eventually, we can have this option just 'select SPARSEMEM'
config MEMORY_HOTPLUG
bool "Allow for memory hot-add"
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 0571f2a..737faf7 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -91,6 +91,9 @@ nodemask_t node_states[NR_NODE_STATES] __read_mostly = {
#ifdef CONFIG_HIGHMEM
[N_HIGH_MEMORY] = { { [0] = 1UL } },
#endif
+#ifdef CONFIG_MOVABLE_NODE
+ [N_MEMORY] = { { [0] = 1UL } },
+#endif
[N_CPU] = { { [0] = 1UL } },
#endif /* NUMA */
};
--
1.7.1
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