diff --git a/mm/Kconfig.debug b/mm/Kconfig.debug
index 7b77d94a1b77..5090ac381d80 100644
--- a/mm/Kconfig.debug
+++ b/mm/Kconfig.debug
@@ -227,6 +227,12 @@ config PTDUMP_DEBUGFS
 config PER_VMA_LOCK_STATS
 	bool "Statistics for per-vma locks"
 	depends on PER_VMA_LOCK
-	default y
 	help
-	  Statistics for per-vma locks.
+	  Say Y here to enable success, retry and failure counters of page
+	  faults handled under protection of per-vma locks. When enabled, the
+	  counters are exposed in /proc/vmstat. This information is useful for
+	  kernel developers to evaluate effectiveness of per-vma locks and to
+	  identify pathological cases. Counting these events introduces a small
+	  overhead in the page fault path.
+
+	  If in doubt, say N.