kcage_create_throttle
extern int kcage_create_throttle(pgcnt_t, int);
(void) kcage_create_throttle(npages, flags);
if (kcage_create_throttle(1, flags) == KCT_NONCRIT) {
if (kcage_create_throttle(npages, flags) == KCT_FAILURE) {
if (kcage_create_throttle(npages, flags) == KCT_FAILURE)