include/linux/mempool.h
Source file repositories/reference/linux-study-clean/include/linux/mempool.h
File Facts
- System
- Linux kernel
- Corpus path
include/linux/mempool.h- Extension
.h- Size
- 4195 bytes
- Lines
- 120
- Domain
- Core OS
- Bucket
- Core Kernel Interface
- Inferred role
- Core OS: implementation source
- Status
- source implementation candidate
Why This File Exists
Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
- Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
- Allocates kernel memory; connect allocation flags and lifetime to context constraints.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/sched.hlinux/alloc_tag.hlinux/wait.hlinux/compiler.h
Detected Declarations
struct kmem_cachefunction mempool_initializedfunction mempool_is_saturated
Annotated Snippet
#ifndef _LINUX_MEMPOOL_H
#define _LINUX_MEMPOOL_H
#include <linux/sched.h>
#include <linux/alloc_tag.h>
#include <linux/wait.h>
#include <linux/compiler.h>
struct kmem_cache;
typedef void * (mempool_alloc_t)(gfp_t gfp_mask, void *pool_data);
typedef void (mempool_free_t)(void *element, void *pool_data);
typedef struct mempool {
spinlock_t lock;
int min_nr; /* nr of elements at *elements */
int curr_nr; /* Current nr of elements at *elements */
void **elements;
void *pool_data;
mempool_alloc_t *alloc;
mempool_free_t *free;
wait_queue_head_t wait;
} mempool_t;
static inline bool mempool_initialized(struct mempool *pool)
{
return pool->elements != NULL;
}
static inline bool mempool_is_saturated(struct mempool *pool)
{
return READ_ONCE(pool->curr_nr) >= pool->min_nr;
}
void mempool_exit(struct mempool *pool);
int mempool_init_node(struct mempool *pool, int min_nr,
mempool_alloc_t *alloc_fn, mempool_free_t *free_fn,
void *pool_data, gfp_t gfp_mask, int node_id);
int mempool_init_noprof(struct mempool *pool, int min_nr,
mempool_alloc_t *alloc_fn, mempool_free_t *free_fn,
void *pool_data);
#define mempool_init(...) \
alloc_hooks(mempool_init_noprof(__VA_ARGS__))
struct mempool *mempool_create(int min_nr, mempool_alloc_t *alloc_fn,
mempool_free_t *free_fn, void *pool_data);
struct mempool *mempool_create_node_noprof(int min_nr,
mempool_alloc_t *alloc_fn, mempool_free_t *free_fn,
void *pool_data, gfp_t gfp_mask, int nid);
#define mempool_create_node(...) \
alloc_hooks(mempool_create_node_noprof(__VA_ARGS__))
#define mempool_create(_min_nr, _alloc_fn, _free_fn, _pool_data) \
mempool_create_node(_min_nr, _alloc_fn, _free_fn, _pool_data, \
GFP_KERNEL, NUMA_NO_NODE)
int mempool_resize(struct mempool *pool, int new_min_nr);
void mempool_destroy(struct mempool *pool);
void *mempool_alloc_noprof(struct mempool *pool, gfp_t gfp_mask) __malloc;
#define mempool_alloc(...) \
alloc_hooks(mempool_alloc_noprof(__VA_ARGS__))
int mempool_alloc_bulk_noprof(struct mempool *pool, void **elem,
unsigned int count);
#define mempool_alloc_bulk(...) \
alloc_hooks(mempool_alloc_bulk_noprof(__VA_ARGS__))
void *mempool_alloc_preallocated(struct mempool *pool) __malloc;
void mempool_free(void *element, struct mempool *pool);
unsigned int mempool_free_bulk(struct mempool *pool, void **elem,
unsigned int count);
/*
* A mempool_alloc_t and mempool_free_t that get the memory from
* a slab cache that is passed in through pool_data.
* Note: the slab cache may not have a ctor function.
*/
void *mempool_alloc_slab(gfp_t gfp_mask, void *pool_data);
void mempool_free_slab(void *element, void *pool_data);
#define mempool_init_slab_pool(_pool, _min_nr, _kc) \
mempool_init(_pool, (_min_nr), mempool_alloc_slab, mempool_free_slab, (void *)(_kc))
#define mempool_create_slab_pool(_min_nr, _kc) \
mempool_create((_min_nr), mempool_alloc_slab, mempool_free_slab, (void *)(_kc))
/*
* a mempool_alloc_t and a mempool_free_t to kmalloc and kfree the
* amount of memory specified by pool_data
*/
Annotation
- Immediate include surface: `linux/sched.h`, `linux/alloc_tag.h`, `linux/wait.h`, `linux/compiler.h`.
- Detected declarations: `struct kmem_cache`, `function mempool_initialized`, `function mempool_is_saturated`.
- Atlas domain: Core OS / Core Kernel Interface.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.