PG_reserved       343 include/linux/page-flags.h #define PAGE_FLAGS_CHECK_AT_FREE (PAGE_FLAGS | 1 << PG_reserved)
PG_reserved       350 include/linux/page-flags.h #define PAGE_FLAGS_CHECK_AT_PREP (PAGE_FLAGS | 1 << PG_reserved | 1 << PG_dirty)
PG_reserved       462 mm/hugetlb.c   				1 << PG_dirty | 1 << PG_active | 1 << PG_reserved |