---

yaml
---
r: 18911
b: refs/heads/master
c: dc85da1
h: refs/heads/master
i:
  18909: 2db648a
  18907: 8521910
  18903: 113640f
  18895: c24547a
  18879: 283b781
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: fc0abb1451c64c79ac80665d5ba74450ce274e4d
+refs/heads/master: dc85da15d42b0efc792b0f5eab774dc5dbc1ceec

trunk/include/linux/mempolicy.h

@@ -159,6 +159,7 @@ extern void mpol_rebind_mm(struct mm_struct *mm, nodemask_t *new);
 extern struct mempolicy default_policy;
 extern struct zonelist *huge_zonelist(struct vm_area_struct *vma,
 		unsigned long addr);
+extern unsigned slab_node(struct mempolicy *policy);
 
 extern int policy_zone;
 

trunk/mm/mempolicy.c

@@ -976,6 +976,36 @@ static unsigned interleave_nodes(struct mempolicy *policy)
 	return nid;
 }
 
+/*
+ * Depending on the memory policy provide a node from which to allocate the
+ * next slab entry.
+ */
+unsigned slab_node(struct mempolicy *policy)
+{
+	if (in_interrupt())
+		return numa_node_id();
+
+	switch (policy->policy) {
+	case MPOL_INTERLEAVE:
+		return interleave_nodes(policy);
+
+	case MPOL_BIND:
+		/*
+		 * Follow bind policy behavior and start allocation at the
+		 * first node.
+		 */
+		return policy->v.zonelist->zones[0]->zone_pgdat->node_id;
+
+	case MPOL_PREFERRED:
+		if (policy->v.preferred_node >= 0)
+			return policy->v.preferred_node;
+		/* Fall through */
+
+	default:
+		return numa_node_id();
+	}
+}
+
 /* Do static interleaving for a VMA with known offset. */
 static unsigned offset_il_node(struct mempolicy *pol,
 		struct vm_area_struct *vma, unsigned long off)

trunk/mm/slab.c

@@ -103,6 +103,7 @@
 #include	<linux/rcupdate.h>
 #include	<linux/string.h>
 #include	<linux/nodemask.h>
+#include	<linux/mempolicy.h>
 #include	<linux/mutex.h>
 
 #include	<asm/uaccess.h>
@@ -773,6 +774,8 @@ static struct array_cache *alloc_arraycache(int node, int entries,
 }
 
 #ifdef CONFIG_NUMA
+static void *__cache_alloc_node(kmem_cache_t *, gfp_t, int);
+
 static inline struct array_cache **alloc_alien_cache(int node, int limit)
 {
 	struct array_cache **ac_ptr;
@@ -2570,6 +2573,15 @@ static inline void *____cache_alloc(kmem_cache_t *cachep, gfp_t flags)
 	void *objp;
 	struct array_cache *ac;
 
+#ifdef CONFIG_NUMA
+	if (current->mempolicy) {
+		int nid = slab_node(current->mempolicy);
+
+		if (nid != numa_node_id())
+			return __cache_alloc_node(cachep, flags, nid);
+	}
+#endif
+
 	check_irq_off();
 	ac = ac_data(cachep);
 	if (likely(ac->avail)) {