diff --git a/Documentation/vm/transhuge.txt b/Documentation/vm/transhuge.txt
index 21cf34f..0dc8632 100644
--- a/Documentation/vm/transhuge.txt
+++ b/Documentation/vm/transhuge.txt
@@ -229,6 +229,11 @@
 thp_split_page_failed is is incremented if kernel fails to split huge
 	page. This can happen if the page was pinned by somebody.
 
+thp_deferred_split_page is incremented when a huge page is put onto split
+	queue. This happens when a huge page is partially unmapped and
+	splitting it would free up some memory. Pages on split queue are
+	going to be split under memory pressure.
+
 thp_split_pmd is incremented every time a PMD split into table of PTEs.
 	This can happen, for instance, when application calls mprotect() or
 	munmap() on part of huge page. It doesn't split huge page, only
diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h
index 58ecc05..ec08432 100644
--- a/include/linux/vm_event_item.h
+++ b/include/linux/vm_event_item.h
@@ -72,6 +72,7 @@
 		THP_COLLAPSE_ALLOC_FAILED,
 		THP_SPLIT_PAGE,
 		THP_SPLIT_PAGE_FAILED,
+		THP_DEFERRED_SPLIT_PAGE,
 		THP_SPLIT_PMD,
 		THP_ZERO_PAGE_ALLOC,
 		THP_ZERO_PAGE_ALLOC_FAILED,
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 1ea21e2..1dddfb2 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -3455,6 +3455,7 @@
 
 	spin_lock_irqsave(&pgdata->split_queue_lock, flags);
 	if (list_empty(page_deferred_list(page))) {
+		count_vm_event(THP_DEFERRED_SPLIT_PAGE);
 		list_add_tail(page_deferred_list(page), &pgdata->split_queue);
 		pgdata->split_queue_len++;
 	}
diff --git a/mm/vmstat.c b/mm/vmstat.c
index f800662..5e43004 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -848,6 +848,7 @@
 	"thp_collapse_alloc_failed",
 	"thp_split_page",
 	"thp_split_page_failed",
+	"thp_deferred_split_page",
 	"thp_split_pmd",
 	"thp_zero_page_alloc",
 	"thp_zero_page_alloc_failed",