diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index 6d53675c2b54..7fbd6720021a 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -109,6 +109,7 @@ enum pageflags {
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 	PG_compound_lock,
 #endif
+	PG_readahead,		/* page in a readahead window */
 	__NR_PAGEFLAGS,
 
 	/* Filesystems */
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 209fdf1f0e76..2c72b7f6e35e 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -6267,6 +6267,7 @@ static const struct trace_print_flags pageflag_names[] = {
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 	{1UL << PG_compound_lock,	"compound_lock"	},
 #endif
+	{1UL << PG_readahead,           "PG_readahead"  },
 };
 
 static void dump_page_flags(unsigned long flags)
diff --git a/mm/readahead.c b/mm/readahead.c
index fad249f570f8..12d8707c36e0 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -186,6 +186,9 @@ __do_page_cache_readahead(struct address_space *mapping, struct file *filp,
 		if (!page)
 			break;
 		page->index = page_offset;
+
+		page->flags |= (1L << PG_readahead);
+
 		list_add(&page->lru, &page_pool);
 		if (page_idx == nr_to_read - lookahead_size)
 			SetPageReadahead(page);