[RFC PATCH 1/3] slub: search partial list on numa_mem_id(), instead of numa_node_id()

[Joonsoo Kim]

Currently, if allocation constraint to node is NUMA_NO_NODE, we search
a partial slab on numa_node_id() node. This doesn't work properly on the
system having memoryless node, since it can have no memory on that node and
there must be no partial slab on that node.

On that node, page allocation always fallback to numa_mem_id() first. So
searching a partial slab on numa_node_id() in that case is proper solution
for memoryless node case.

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim at lge.com>

diff --git a/mm/slub.c b/mm/slub.c
index 545a170..cc1f995 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1698,7 +1698,7 @@ static void *get_partial(struct kmem_cache *s, gfp_t flags, int node,
 		struct kmem_cache_cpu *c)
 {
 	void *object;
-	int searchnode = (node == NUMA_NO_NODE) ? numa_node_id() : node;
+	int searchnode = (node == NUMA_NO_NODE) ? numa_mem_id() : node;
 
 	object = get_partial_node(s, get_node(s, searchnode), c, flags);
 	if (object || node != NUMA_NO_NODE)
-- 
1.7.9.5