diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 9f4dd2b..0a2890b 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -2006,6 +2006,7 @@
     // Even though ATRACE_INT64 already checks if tracing is enabled, it doesn't prevent the
     // side-effect of getTotalSize(), so we check that again here
     if (ATRACE_ENABLED()) {
+        // getTotalSize returns the total number of buffers that were allocated by SurfaceFlinger
         ATRACE_INT64("Total Buffer Size", GraphicBufferAllocator::get().getTotalSize());
     }
 }