[RFC PATCH 19/23 V2] x86: get pg_data_t's memory from other node

[Lai Jiangshan <laijs-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>]

From: Yasuaki Ishimatsu <isimatu.yasuaki-+CUm20s59erQFUHtdCDX3A@public.gmane.org>

If system can create movable node which all memory of the
node is allocated as ZONE_MOVABLE, setup_node_data() cannot
allocate memory for the node's pg_data_t.
So when memblock_alloc_nid() fails, setup_node_data() retries
memblock_alloc().

Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki-+CUm20s59erQFUHtdCDX3A@public.gmane.org>
Signed-off-by: Lai Jiangshan <laijs-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
---
 arch/x86/mm/numa.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index 2d125be..a86e315 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -223,9 +223,13 @@ static void __init setup_node_data(int nid, u64 start, u64 end)
 		remapped = true;
 	} else {
 		nd_pa = memblock_alloc_nid(nd_size, SMP_CACHE_BYTES, nid);
-		if (!nd_pa) {
-			pr_err("Cannot find %zu bytes in node %d\n",
+		if (!nd_pa)
+			printk(KERN_WARNING "Cannot find %zu bytes in node %d\n",
 			       nd_size, nid);
+		nd_pa = memblock_alloc(nd_size, SMP_CACHE_BYTES);
+		if (!nd_pa) {
+			pr_err("Cannot find %zu bytes in other node\n",
+			       nd_size);
 			return;
 		}
 		nd = __va(nd_pa);
-- 
1.7.1