arena

include/mem/arena.h

struct hugepage_meta_common

struct hugepage_meta_common {
    enum arena_allocation_type  type;
    uint16_t                    meta_pages;
    uint16_t                    reserved;
    uint32_t                    magic;
};

struct hugepage_meta_common referenced types:

• enum arena_allocation_type

struct hugepage_buddy_meta

struct hugepage_buddy_meta {
    struct hugepage_meta_common  common;
    uint8_t                      order_of_block[512];
};

struct hugepage_buddy_meta referenced types:

• struct hugepage_meta_common

struct hugepage_slab_metadata

struct hugepage_slab_metadata {
    size_t   obj_size;
    size_t   obj_count;
    void     *free_list;
    uint8_t  *alloc_bitmap;
};

struct arena

struct arena {
    struct spinlock             lock;
    struct minheap              *hugepages;
    size_t                      max_hpages;
    struct hugepage_tb          *tb;
    enum arena_flags            flags;
    enum arena_allocation_type  preferred;
};

struct arena referenced types:

• struct spinlock
• struct minheap
• enum arena_flags
• enum arena_allocation_type

enum arena_allocation_type

enum arena_allocation_type {
    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

enum arena_flags {
    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 | ARENA_FLAGS_RECYCLE,
};

arena_can_demand_alloc

bool arena_can_demand_alloc(struct arena *a);

arena_can_demand_alloc referenced types:

• struct arena

arena_can_reclaim_freed

bool arena_can_reclaim_freed(struct arena *a);

arena_can_reclaim_freed referenced types:

• struct arena

arena_allows_unsafe_destroy

bool arena_allows_unsafe_destroy(struct arena *a);

arena_allows_unsafe_destroy referenced types:

• struct arena

arena_has_hugepage_limit

bool arena_has_hugepage_limit(struct arena *a);

arena_has_hugepage_limit referenced types:

• struct arena

arena_should_recycle

bool arena_should_recycle(struct arena *a);

arena_should_recycle referenced types:

• struct arena

arena_has_private_htb

bool arena_has_private_htb(struct arena *a);

arena_has_private_htb referenced types:

• struct arena

arena_must_alloc_new

bool arena_must_alloc_new(struct arena *a);

arena_must_alloc_new referenced types:

• struct arena

Defines

ARENA_HTB_SIZE

#define ARENA_HTB_SIZE 16

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