they can be used to set or query if transparent huge pages are disabled. introduced in linux 3.15 commit a0715cc22601e8830ace98366c0c2bd8da52af52
@@ -92,6 +92,9 @@ extern "C" {
#define PR_GET_TID_ADDRESS 40
+#define PR_SET_THP_DISABLE 41
+#define PR_GET_THP_DISABLE 42
+
int prctl (int, ...);
#ifdef __cplusplus