2 files changed, 11 insertions, 0 deletions

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 154b9b608da6..2804d23e2da7 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -484,6 +484,7 @@ void putback_lru_page(struct page *page)
 {
         int lru;
         int active = !!TestClearPageActive(page);
+        int was_unevictable = PageUnevictable(page);
 
         VM_BUG_ON(PageLRU(page));
 
@@ -525,6 +526,11 @@ redo:
                  */
         }
 
+        if (was_unevictable && lru != LRU_UNEVICTABLE)
+                count_vm_event(UNEVICTABLE_PGRESCUED);
+        else if (!was_unevictable && lru == LRU_UNEVICTABLE)
+                count_vm_event(UNEVICTABLE_PGCULLED);
+
         put_page(page);         /* drop ref from isolate */
 }
 
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 4380b0dba6d9..6cb08cdd4f03 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -677,6 +677,11 @@ static const char * const vmstat_text[] = {
         "htlb_buddy_alloc_success",
         "htlb_buddy_alloc_fail",
 #endif
+#ifdef CONFIG_UNEVICTABLE_LRU
+        "unevictable_pgs_culled",
+        "unevictable_pgs_scanned",
+        "unevictable_pgs_rescued",
+#endif
 #endif
 };