arena

include/mem/arena.h

struct hugepage_meta_common

Member Type	Member Name
enum arena_allocation_type	type
uint16_t	meta_pages
uint16_t	reserved
uint32_t	magic

struct hugepage_buddy_meta

Member Type	Member Name
struct hugepage_meta_common	common
uint8_t	order_of_block[512]

struct hugepage_slab_metadata

Member Type	Member Name
size_t	obj_size
size_t	obj_count
void	*free_list
uint8_t	*alloc_bitmap

struct arena

Member Type	Member Name
struct spinlock	lock
struct minheap	*hugepages
size_t	max_hpages
struct hugepage_tb	*tb
enum arena_flags	flags
enum arena_allocation_type	preferred

enum arena_allocation_type

Name	Value
ARENA_ALLOCATION_TYPE_BITMAP	0
ARENA_ALLOCATION_TYPE_BUDDY	1
ARENA_ALLOCATION_TYPE_SLAB	2
ARENA_ALLOCATION_TYPE_BUMP	3
ARENA_ALLOCATION_TYPE_DEFAULT	ARENA_ALLOCATION_TYPE_BITMAP

enum arena_flags

Name	Value
ARENA_FLAGS_DEMAND_ALLOC	(1 << 0)
ARENA_FLAGS_RECLAIM_FREED	(1 << 1)
ARENA_FLAGS_ALLOW_UNSAFE_DESTROY	(1 << 2)
ARENA_FLAGS_SET_MAX_HUGEPAGES	(1 << 3)
ARENA_FLAGS_RECYCLE	(1 << 4)
ARENA_FLAGS_PRIVATE_HTB	(1 << 5)
ARENA_FLAGS_ALWAYS_CREATE_NEW	(1 << 6)
ARENA_FLAGS_DEFAULT	`ARENA_FLAGS_RECLAIM_FREED

• static inline bool arena_can_demand_alloc(struct arena *a)
• static inline bool arena_can_reclaim_freed(struct arena *a)
• static inline bool arena_allows_unsafe_destroy(struct arena *a)
• static inline bool arena_has_hugepage_limit(struct arena *a)
• static inline bool arena_should_recycle(struct arena *a)
• static inline bool arena_has_private_htb(struct arena *a)
• static inline bool arena_must_alloc_new(struct arena *a)
• struct arena *arena_init(enum arena_flags flags,enum arena_allocation_type type)
• struct arena *arena_init_default(void)
• struct arena *arena_init_with_limit(enum arena_flags flags,enum arena_allocation_type type,size_t hp_limit)
• struct arena *arena_init_from_hugepage(struct hugepage *hp,enum arena_flags flags,enum arena_allocation_type type)
• struct arena *arena_init_from_hugepage_with_limit(struct hugepage *hp,enum arena_flags flags,enum arena_allocation_type type,size_t hp_limit)
• void arena_insert_hugepage(struct arena *a,struct hugepage *hp)

Defines

• ARENA_HTB_SIZE: 16

---