Documentation/mm/page_cache.rst
Source file repositories/reference/linux-study-clean/Documentation/mm/page_cache.rst
File Facts
- System
- Linux kernel
- Corpus path
Documentation/mm/page_cache.rst- Extension
.rst- Size
- 371 bytes
- Lines
- 16
- Domain
- Support Tooling And Documentation
- Bucket
- Documentation
- Inferred role
- Support Tooling And Documentation: documentation
- Status
- atlas-only
Why This File Exists
Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
- Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
Dependency Surface
- No C-style include directives detected by the generator.
Detected Declarations
- No top-level syscall, struct, function, initcall, or export declaration detected by the generator.
Annotated Snippet
.. SPDX-License-Identifier: GPL-2.0
==========
Page Cache
==========
The page cache is the primary way that the user and the rest of the kernel
interact with filesystems. It can be bypassed (e.g. with O_DIRECT),
but normal reads, writes and mmaps go through the page cache.
Folios
======
The folio is the unit of memory management within the page cache.
OperationsAnnotation
- Atlas domain: Support Tooling And Documentation / Documentation.
- Implementation status: atlas-only.
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.