diff --git a/mm/vmscan.c b/mm/vmscan.c
index d036e59..2552265 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -250,6 +250,7 @@
 		unsigned long long delta;
 		unsigned long total_scan;
 		unsigned long max_pass;
+		int shrink_ret = 0;
 
 		max_pass = do_shrinker_shrink(shrinker, shrink, 0);
 		delta = (4 * nr_pages_scanned) / shrinker->seeks;
@@ -274,9 +275,12 @@
 		total_scan = shrinker->nr;
 		shrinker->nr = 0;
 
+		trace_mm_shrink_slab_start(shrinker, shrink, total_scan,
+					nr_pages_scanned, lru_pages,
+					max_pass, delta, total_scan);
+
 		while (total_scan >= SHRINK_BATCH) {
 			long this_scan = SHRINK_BATCH;
-			int shrink_ret;
 			int nr_before;
 
 			nr_before = do_shrinker_shrink(shrinker, shrink, 0);
@@ -293,6 +297,8 @@
 		}
 
 		shrinker->nr += total_scan;
+		trace_mm_shrink_slab_end(shrinker, shrink_ret, total_scan,
+					 shrinker->nr);
 	}
 	up_read(&shrinker_rwsem);
 out: