include/linux/zsmalloc.h

File Facts

System

Linux kernel

Corpus path

include/linux/zsmalloc.h

Extension

.h

Size

1693 bytes

Lines

56

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.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/types.h

Detected Declarations

• struct zs_pool_stats
• struct zs_pool
• struct scatterlist

Annotated Snippet

struct zs_pool_stats {
	/* How many pages were migrated (freed) */
	atomic_long_t pages_compacted;
};

struct zs_pool;
struct scatterlist;

struct zs_pool *zs_create_pool(const char *name);
void zs_destroy_pool(struct zs_pool *pool);

unsigned long zs_malloc(struct zs_pool *pool, size_t size, gfp_t flags,
			const int nid);
void zs_free(struct zs_pool *pool, unsigned long obj);

size_t zs_huge_class_size(struct zs_pool *pool);

unsigned long zs_get_total_pages(struct zs_pool *pool);
unsigned long zs_compact(struct zs_pool *pool);

unsigned int zs_lookup_class_index(struct zs_pool *pool, unsigned int size);

void zs_pool_stats(struct zs_pool *pool, struct zs_pool_stats *stats);

void *zs_obj_read_begin(struct zs_pool *pool, unsigned long handle,
			size_t mem_len, void *local_copy);
void zs_obj_read_end(struct zs_pool *pool, unsigned long handle,
		     size_t mem_len, void *handle_mem);
void zs_obj_read_sg_begin(struct zs_pool *pool, unsigned long handle,
			  struct scatterlist *sg, size_t mem_len);
void zs_obj_read_sg_end(struct zs_pool *pool, unsigned long handle);
void zs_obj_write(struct zs_pool *pool, unsigned long handle,
		  void *handle_mem, size_t mem_len);

extern const struct movable_operations zsmalloc_mops;

#endif

Annotation

• Immediate include surface: `linux/types.h`.
• Detected declarations: `struct zs_pool_stats`, `struct zs_pool`, `struct scatterlist`.
• Atlas domain: Core OS / Core Kernel Interface.
• Implementation status: source implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

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.