[PATCH 2/5] memory-hotplug: x86_32: suitable memory should go to ZONE_MOVABLE

Wang Nan
2014-07-18T08:10:23Z

and lower than newly added memory for x86_32.

Signed-off-by: Wang Nan <wangnan0@huawei.com>
---
arch/x86/mm/init_32.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index e395048..dd69833 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -826,9 +826,15 @@ int arch_add_memory(int nid, u64 start, u64 size)
{
struct pglist_data *pgdata = NODE_DATA(nid);
struct zone *zone = pgdata->node_zones + ZONE_HIGHMEM;
+ struct zone *movable_zone = pgdat->node_zones + ZONE_MOVABLE;
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long nr_pages = size >> PAGE_SHIFT;

+ 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