The patch titled
Subject: mm/memory_hotplug.c: improve comments
has been added to the -mm tree. Its filename is
mm-memory_hotplugc-improve-comments.patch
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------------------------------------------------------
From: Tang Chen <tangchen@xxxxxxxxxxxxxx>
Subject: mm/memory_hotplug.c: improve comments
Signed-off-by: Tang Chen <tangchen@xxxxxxxxxxxxxx>
Cc: Jiang Liu <jiang.liu@xxxxxxxxxx>
Cc: Lai Jiangshan <laijs@xxxxxxxxxxxxxx>
Cc: Wen Congyang <wency@xxxxxxxxxxxxxx>
Cc: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory_hotplug.c | 18 ++++++++++++------
1 file changed, 12 insertions(+), 6 deletions(-)
diff -puN mm/memory_hotplug.c~mm-memory_hotplugc-improve-comments mm/memory_hotplug.c
--- a/mm/memory_hotplug.c~mm-memory_hotplugc-improve-comments
+++ a/mm/memory_hotplug.c
@@ -590,18 +590,21 @@ static int online_pages_range(unsigned l
}
#ifdef CONFIG_MOVABLE_NODE
-/* when CONFIG_MOVABLE_NODE, we allow online node don't have normal memory */
+/*
+ * When CONFIG_MOVABLE_NODE, we permit onlining of a node which doesn't have
+ * normal memory.
+ */
static bool can_online_high_movable(struct zone *zone)
{
return true;
}
-#else /* #ifdef CONFIG_MOVABLE_NODE */
+#else /* CONFIG_MOVABLE_NODE */
/* ensure every online node has NORMAL memory */
static bool can_online_high_movable(struct zone *zone)
{
return node_state(zone_to_nid(zone), N_NORMAL_MEMORY);
}
-#endif /* #ifdef CONFIG_MOVABLE_NODE */
+#endif /* CONFIG_MOVABLE_NODE */
/* check which state of node_states will be changed when online memory */
static void node_states_check_changes_online(unsigned long nr_pages,
@@ -1112,12 +1115,15 @@ check_pages_isolated(unsigned long start
}
#ifdef CONFIG_MOVABLE_NODE
-/* when CONFIG_MOVABLE_NODE, we allow online node don't have normal memory */
+/*
+ * When CONFIG_MOVABLE_NODE, we permit offlining of a node which doesn't have
+ * normal memory.
+ */
static bool can_offline_normal(struct zone *zone, unsigned long nr_pages)
{
return true;
}
-#else /* #ifdef CONFIG_MOVABLE_NODE */
+#else /* CONFIG_MOVABLE_NODE */
/* ensure the node has NORMAL memory if it is still online */
static bool can_offline_normal(struct zone *zone, unsigned long nr_pages)
{
@@ -1141,7 +1147,7 @@ static bool can_offline_normal(struct zo
*/
return present_pages == 0;
}
-#endif /* #ifdef CONFIG_MOVABLE_NODE */
+#endif /* CONFIG_MOVABLE_NODE */
/* check which state of node_states will be changed when offline memory */
static void node_states_check_changes_offline(unsigned long nr_pages,
_
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
mm-memory_hotplugc-improve-comments.patch
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