4 files changed, 34 insertions, 7 deletions

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 9b648bd63451..2e0bfc93484b 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -533,6 +533,9 @@ static int mem_cgroup_charge_common(struct page *page, struct mm_struct *mm,
         unsigned long nr_retries = MEM_CGROUP_RECLAIM_RETRIES;
         struct mem_cgroup_per_zone *mz;
 
+        if (mem_cgroup_subsys.disabled)
+                return 0;
+
         /*
          * Should page_cgroup's go to their own slab?
          * One could optimize the performance of the charging routine
@@ -665,6 +668,9 @@ void mem_cgroup_uncharge_page(struct page *page)
         struct mem_cgroup_per_zone *mz;
         unsigned long flags;
 
+        if (mem_cgroup_subsys.disabled)
+                return;
+
         /*
          * Check if our page_cgroup is valid
          */
@@ -705,6 +711,9 @@ int mem_cgroup_prepare_migration(struct page *page)
 {
         struct page_cgroup *pc;
 
+        if (mem_cgroup_subsys.disabled)
+                return 0;
+
         lock_page_cgroup(page);
         pc = page_get_page_cgroup(page);
         if (pc)
@@ -803,6 +812,9 @@ static int mem_cgroup_force_empty(struct mem_cgroup *mem)
         int ret = -EBUSY;
         int node, zid;
 
+        if (mem_cgroup_subsys.disabled)
+                return 0;
+
         css_get(&mem->css);
         /*
          * page reclaim code (kswapd etc..) will move pages between
@@ -966,7 +978,7 @@ static int alloc_mem_cgroup_per_zone_info(struct mem_cgroup *mem, int node)
 {
         struct mem_cgroup_per_node *pn;
         struct mem_cgroup_per_zone *mz;
-        int zone;
+        int zone, tmp = node;
         /*
          * This routine is called against possible nodes.
          * But it's BUG to call kmalloc() against offline node.
@@ -975,10 +987,9 @@ static int alloc_mem_cgroup_per_zone_info(struct mem_cgroup *mem, int node)
          *       never be onlined. It's better to use memory hotplug callback
          *       function.
          */
-        if (node_state(node, N_HIGH_MEMORY))
-                pn = kmalloc_node(sizeof(*pn), GFP_KERNEL, node);
-        else
-                pn = kmalloc(sizeof(*pn), GFP_KERNEL);
+        if (!node_state(node, N_NORMAL_MEMORY))
+                tmp = -1;
+        pn = kmalloc_node(sizeof(*pn), GFP_KERNEL, tmp);
         if (!pn)
                 return 1;
 
@@ -1053,6 +1064,8 @@ static void mem_cgroup_destroy(struct cgroup_subsys *ss,
 static int mem_cgroup_populate(struct cgroup_subsys *ss,
                                 struct cgroup *cont)
 {
+        if (mem_cgroup_subsys.disabled)
+                return 0;
         return cgroup_add_files(cont, ss, mem_cgroup_files,
                                         ARRAY_SIZE(mem_cgroup_files));
 }
@@ -1065,6 +1078,9 @@ static void mem_cgroup_move_task(struct cgroup_subsys *ss,
         struct mm_struct *mm;
         struct mem_cgroup *mem, *old_mem;
 
+        if (mem_cgroup_subsys.disabled)
+                return;
+
         mm = get_task_mm(p);
         if (mm == NULL)
                 return;
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index f255eda693b0..beb592fe9389 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -423,7 +423,7 @@ void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask)
         struct task_struct *p;
 
         cgroup_lock();
-        rcu_read_lock();
+        read_lock(&tasklist_lock);
 retry:
         p = select_bad_process(&points, mem);
         if (PTR_ERR(p) == -1UL)
@@ -436,7 +436,7 @@ retry:
                                 "Memory cgroup out of memory"))
                 goto retry;
 out:
-        rcu_read_unlock();
+        read_unlock(&tasklist_lock);
         cgroup_unlock();
 }
 #endif
diff --git a/mm/sparse.c b/mm/sparse.c
index f6a43c09c322..98d6b39c3472 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -149,8 +149,18 @@ static inline int sparse_early_nid(struct mem_section *section)
 /* Record a memory area against a node. */
 void __init memory_present(int nid, unsigned long start, unsigned long end)
 {
+        unsigned long max_arch_pfn = 1UL << (MAX_PHYSMEM_BITS-PAGE_SHIFT);
         unsigned long pfn;
 
+        /*
+         * Sanity checks - do not allow an architecture to pass
+         * in larger pfns than the maximum scope of sparsemem:
+         */
+        if (start >= max_arch_pfn)
+                return;
+        if (end >= max_arch_pfn)
+                end = max_arch_pfn;
+
         start &= PAGE_SECTION_MASK;
         for (pfn = start; pfn < end; pfn += PAGES_PER_SECTION) {
                 unsigned long section = pfn_to_section_nr(pfn);
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 422d960ffcd8..7c7286e9506d 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -388,6 +388,7 @@ static char * const migratetype_names[MIGRATE_TYPES] = {
         "Reclaimable",
         "Movable",
         "Reserve",
+        "Isolate",
 };
 
 static void *frag_start(struct seq_file *m, loff_t *pos)