[PATCH 5/5] memory-hotplug: powerpc: suitable memory should go to ZONE_MOVABLE

Wang Nan
2014-07-18T08:09:16Z

and lower than newly added memory for powerpc.

Signed-off-by: Wang Nan <wangnan0@huawei.com>
---
arch/powerpc/mm/mem.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 2c8e90f..2d869ef 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -118,6 +118,7 @@ int arch_add_memory(int nid, u64 start, u64 size)
{
struct pglist_data *pgdata;
struct zone *zone;
+ struct zone *movable_zone;
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long nr_pages = size >> PAGE_SHIFT;

@@ -129,6 +130,11 @@ int arch_add_memory(int nid, u64 start, u64 size)

/* this should work for most non-highmem platforms */
zone = pgdata->node_zones;
+ movable_zone = pgdat->node_zones + ZONE_MOVABLE;
+ if (!zone_is_empty(movable_zone))
+ if (zone_spans_pfn(movable_zone, start_pfn) ||
+ (zone_end_pfn(movable_zone) <= start_pfn))
+ zone = movable_zone;

return __add_pages(nid, zone, start_pfn, nr_pages);
}
--
1.8.4