diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 45add35..e46a073 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -117,7 +117,7 @@
 }
 
 extern bool mem_cgroup_oom_called(struct task_struct *task);
-
+void mem_cgroup_update_mapped_file_stat(struct page *page, int val);
 #else /* CONFIG_CGROUP_MEM_RES_CTLR */
 struct mem_cgroup;
 
@@ -271,6 +271,11 @@
 {
 }
 
+static inline void mem_cgroup_update_mapped_file_stat(struct page *page,
+							int val)
+{
+}
+
 #endif /* CONFIG_CGROUP_MEM_CONT */
 
 #endif /* _LINUX_MEMCONTROL_H */
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 70db6e0..6f68290 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -62,7 +62,8 @@
 	 * For MEM_CONTAINER_TYPE_ALL, usage = pagecache + rss.
 	 */
 	MEM_CGROUP_STAT_CACHE, 	   /* # of pages charged as cache */
-	MEM_CGROUP_STAT_RSS,	   /* # of pages charged as rss */
+	MEM_CGROUP_STAT_RSS,	   /* # of pages charged as anon rss */
+	MEM_CGROUP_STAT_MAPPED_FILE,  /* # of pages charged as file rss */
 	MEM_CGROUP_STAT_PGPGIN_COUNT,	/* # of pages paged in */
 	MEM_CGROUP_STAT_PGPGOUT_COUNT,	/* # of pages paged out */
 
@@ -900,6 +901,44 @@
 	mem_cgroup_walk_tree(mem, NULL, record_last_oom_cb);
 }
 
+/*
+ * Currently used to update mapped file statistics, but the routine can be
+ * generalized to update other statistics as well.
+ */
+void mem_cgroup_update_mapped_file_stat(struct page *page, int val)
+{
+	struct mem_cgroup *mem;
+	struct mem_cgroup_stat *stat;
+	struct mem_cgroup_stat_cpu *cpustat;
+	int cpu;
+	struct page_cgroup *pc;
+
+	if (!page_is_file_cache(page))
+		return;
+
+	pc = lookup_page_cgroup(page);
+	if (unlikely(!pc))
+		return;
+
+	lock_page_cgroup(pc);
+	mem = pc->mem_cgroup;
+	if (!mem)
+		goto done;
+
+	if (!PageCgroupUsed(pc))
+		goto done;
+
+	/*
+	 * Preemption is already disabled, we don't need get_cpu()
+	 */
+	cpu = smp_processor_id();
+	stat = &mem->stat;
+	cpustat = &stat->cpustat[cpu];
+
+	__mem_cgroup_stat_add_safe(cpustat, MEM_CGROUP_STAT_MAPPED_FILE, val);
+done:
+	unlock_page_cgroup(pc);
+}
 
 /*
  * Unlike exported interface, "oom" parameter is added. if oom==true,
@@ -1098,6 +1137,10 @@
 	struct mem_cgroup_per_zone *from_mz, *to_mz;
 	int nid, zid;
 	int ret = -EBUSY;
+	struct page *page;
+	int cpu;
+	struct mem_cgroup_stat *stat;
+	struct mem_cgroup_stat_cpu *cpustat;
 
 	VM_BUG_ON(from == to);
 	VM_BUG_ON(PageLRU(pc->page));
@@ -1118,6 +1161,23 @@
 
 	res_counter_uncharge(&from->res, PAGE_SIZE);
 	mem_cgroup_charge_statistics(from, pc, false);
+
+	page = pc->page;
+	if (page_is_file_cache(page) && page_mapped(page)) {
+		cpu = smp_processor_id();
+		/* Update mapped_file data for mem_cgroup "from" */
+		stat = &from->stat;
+		cpustat = &stat->cpustat[cpu];
+		__mem_cgroup_stat_add_safe(cpustat, MEM_CGROUP_STAT_MAPPED_FILE,
+						-1);
+
+		/* Update mapped_file data for mem_cgroup "to" */
+		stat = &to->stat;
+		cpustat = &stat->cpustat[cpu];
+		__mem_cgroup_stat_add_safe(cpustat, MEM_CGROUP_STAT_MAPPED_FILE,
+						1);
+	}
+
 	if (do_swap_account)
 		res_counter_uncharge(&from->memsw, PAGE_SIZE);
 	css_put(&from->css);
@@ -2046,6 +2106,7 @@
 enum {
 	MCS_CACHE,
 	MCS_RSS,
+	MCS_MAPPED_FILE,
 	MCS_PGPGIN,
 	MCS_PGPGOUT,
 	MCS_INACTIVE_ANON,
@@ -2066,6 +2127,7 @@
 } memcg_stat_strings[NR_MCS_STAT] = {
 	{"cache", "total_cache"},
 	{"rss", "total_rss"},
+	{"mapped_file", "total_mapped_file"},
 	{"pgpgin", "total_pgpgin"},
 	{"pgpgout", "total_pgpgout"},
 	{"inactive_anon", "total_inactive_anon"},
@@ -2086,6 +2148,8 @@
 	s->stat[MCS_CACHE] += val * PAGE_SIZE;
 	val = mem_cgroup_read_stat(&mem->stat, MEM_CGROUP_STAT_RSS);
 	s->stat[MCS_RSS] += val * PAGE_SIZE;
+	val = mem_cgroup_read_stat(&mem->stat, MEM_CGROUP_STAT_MAPPED_FILE);
+	s->stat[MCS_MAPPED_FILE] += val * PAGE_SIZE;
 	val = mem_cgroup_read_stat(&mem->stat, MEM_CGROUP_STAT_PGPGIN_COUNT);
 	s->stat[MCS_PGPGIN] += val;
 	val = mem_cgroup_read_stat(&mem->stat, MEM_CGROUP_STAT_PGPGOUT_COUNT);
diff --git a/mm/page_cgroup.c b/mm/page_cgroup.c
index 4f31c9b..672089d 100644
--- a/mm/page_cgroup.c
+++ b/mm/page_cgroup.c
@@ -99,6 +99,8 @@
 	unsigned long pfn = page_to_pfn(page);
 	struct mem_section *section = __pfn_to_section(pfn);
 
+	if (!section->page_cgroup)
+		return NULL;
 	return section->page_cgroup + pfn;
 }
 
diff --git a/mm/rmap.c b/mm/rmap.c
index c9ccc1a..836c6c6 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -703,8 +703,10 @@
  */
 void page_add_file_rmap(struct page *page)
 {
-	if (atomic_inc_and_test(&page->_mapcount))
+	if (atomic_inc_and_test(&page->_mapcount)) {
 		__inc_zone_page_state(page, NR_FILE_MAPPED);
+		mem_cgroup_update_mapped_file_stat(page, 1);
+	}
 }
 
 #ifdef CONFIG_DEBUG_VM
@@ -753,6 +755,7 @@
 			mem_cgroup_uncharge_page(page);
 		__dec_zone_page_state(page,
 			PageAnon(page) ? NR_ANON_PAGES : NR_FILE_MAPPED);
+		mem_cgroup_update_mapped_file_stat(page, -1);
 		/*
 		 * It would be tidy to reset the PageAnon mapping here,
 		 * but that might overwrite a racing page_add_anon_rmap