// on the private free list. If we didn't find any blocks on the public free lists, allocate a new
// region, break it up into blocks and put them on the private free list.
void *nbd_malloc (size_t n) {
// on the private free list. If we didn't find any blocks on the public free lists, allocate a new
// region, break it up into blocks and put them on the private free list.
void *nbd_malloc (size_t n) {