diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 48bf12e..ffe66e3 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -431,6 +431,15 @@
 	 */
 	int			nr_migrate_reserve_block;
 
+#ifdef CONFIG_MEMORY_ISOLATION
+	/*
+	 * Number of isolated pageblock. It is used to solve incorrect
+	 * freepage counting problem due to racy retrieving migratetype
+	 * of pageblock. Protected by zone->lock.
+	 */
+	unsigned long		nr_isolate_pageblock;
+#endif
+
 #ifdef CONFIG_MEMORY_HOTPLUG
 	/* see spanned/present_pages for more description */
 	seqlock_t		span_seqlock;
diff --git a/include/linux/page-isolation.h b/include/linux/page-isolation.h
index 3fff8e7..2dc1e16 100644
--- a/include/linux/page-isolation.h
+++ b/include/linux/page-isolation.h
@@ -2,6 +2,10 @@
 #define __LINUX_PAGEISOLATION_H
 
 #ifdef CONFIG_MEMORY_ISOLATION
+static inline bool has_isolate_pageblock(struct zone *zone)
+{
+	return zone->nr_isolate_pageblock;
+}
 static inline bool is_migrate_isolate_page(struct page *page)
 {
 	return get_pageblock_migratetype(page) == MIGRATE_ISOLATE;
@@ -11,6 +15,10 @@
 	return migratetype == MIGRATE_ISOLATE;
 }
 #else
+static inline bool has_isolate_pageblock(struct zone *zone)
+{
+	return false;
+}
 static inline bool is_migrate_isolate_page(struct page *page)
 {
 	return false;
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 9cd36b8..df1da25b 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -739,9 +739,16 @@
 	if (nr_scanned)
 		__mod_zone_page_state(zone, NR_PAGES_SCANNED, -nr_scanned);
 
+	if (unlikely(has_isolate_pageblock(zone) ||
+		is_migrate_isolate(migratetype))) {
+		migratetype = get_pfnblock_migratetype(page, pfn);
+		if (is_migrate_isolate(migratetype))
+			goto skip_counting;
+	}
+	__mod_zone_freepage_state(zone, 1 << order, migratetype);
+
+skip_counting:
 	__free_one_page(page, pfn, zone, order, migratetype);
-	if (unlikely(!is_migrate_isolate(migratetype)))
-		__mod_zone_freepage_state(zone, 1 << order, migratetype);
 	spin_unlock(&zone->lock);
 }
 
diff --git a/mm/page_isolation.c b/mm/page_isolation.c
index d1473b2..1fa4a4d 100644
--- a/mm/page_isolation.c
+++ b/mm/page_isolation.c
@@ -60,6 +60,7 @@
 		int migratetype = get_pageblock_migratetype(page);
 
 		set_pageblock_migratetype(page, MIGRATE_ISOLATE);
+		zone->nr_isolate_pageblock++;
 		nr_pages = move_freepages_block(zone, page, MIGRATE_ISOLATE);
 
 		__mod_zone_freepage_state(zone, -nr_pages, migratetype);
@@ -83,6 +84,7 @@
 	nr_pages = move_freepages_block(zone, page, migratetype);
 	__mod_zone_freepage_state(zone, nr_pages, migratetype);
 	set_pageblock_migratetype(page, migratetype);
+	zone->nr_isolate_pageblock--;
 out:
 	spin_unlock_irqrestore(&zone->lock, flags);
 }