mm/swap_state.c

File Facts

System

Linux kernel

Corpus path

mm/swap_state.c

Extension

.c

Size

31293 bytes

Lines

1044

Domain

Core OS

Bucket

Memory Management

Inferred role

Core OS: exported/initcall integration point

Status

integration 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.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• 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/mm.h
• linux/gfp.h
• linux/kernel_stat.h
• linux/mempolicy.h
• linux/swap.h
• linux/leafops.h
• linux/init.h
• linux/pagemap.h
• linux/folio_batch.h
• linux/backing-dev.h
• linux/blkdev.h
• linux/migrate.h
• linux/vmalloc.h
• linux/huge_mm.h
• linux/shmem_fs.h
• internal.h
• swap_table.h
• swap.h

Detected Declarations

• function show_swap_cache_info
• function use
• function swap_cache_has_folio
• function __swap_cache_add_check
• function __swap_cache_do_add_folio
• function __swap_cache_add_folio
• function __swap_cache_do_del_folio
• function __swap_cache_del_folio
• function swap_cache_del_folio
• function __swap_cache_replace_folio
• function replaced
• function IO
• function folio_free_swap
• function free_folio_and_swap_cache
• function free_pages_and_swap_cache
• function swap_use_vma_readahead
• function swap_update_readahead
• function __swapin_nr_pages
• function swapin_nr_pages
• function swap_vma_ra_win
• function vma_ra_enabled_show
• function vma_ra_enabled_store
• function swap_init
• module init swap_init

Annotated Snippet

subsys_initcall(swap_init);
#endif

Annotation

• Immediate include surface: `linux/mm.h`, `linux/gfp.h`, `linux/kernel_stat.h`, `linux/mempolicy.h`, `linux/swap.h`, `linux/leafops.h`, `linux/init.h`, `linux/pagemap.h`.
• Detected declarations: `function show_swap_cache_info`, `function use`, `function swap_cache_has_folio`, `function __swap_cache_add_check`, `function __swap_cache_do_add_folio`, `function __swap_cache_add_folio`, `function __swap_cache_do_del_folio`, `function __swap_cache_del_folio`, `function swap_cache_del_folio`, `function __swap_cache_replace_folio`.
• Atlas domain: Core OS / Memory Management.
• Implementation status: integration 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.