tools/testing/selftests/mm/page_frag/page_frag_test.c

File Facts

System

Linux kernel

Corpus path

tools/testing/selftests/mm/page_frag/page_frag_test.c

Extension

.c

Size

4605 bytes

Lines

199

Domain

Support Tooling And Documentation

Bucket

tools

Inferred role

Support Tooling And Documentation: exported/initcall integration point

Status

integration implementation candidate

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.
• 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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/module.h
• linux/cpumask.h
• linux/completion.h
• linux/ptr_ring.h
• linux/kthread.h
• linux/page_frag_cache.h

Detected Declarations

• function page_frag_pop_thread
• function page_frag_push_thread
• function page_frag_test_init
• function page_frag_test_exit
• module init page_frag_test_init

Annotated Snippet

module_init(page_frag_test_init);
module_exit(page_frag_test_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Yunsheng Lin <linyunsheng@huawei.com>");
MODULE_DESCRIPTION("Test module for page_frag");

Annotation

• Immediate include surface: `linux/module.h`, `linux/cpumask.h`, `linux/completion.h`, `linux/ptr_ring.h`, `linux/kthread.h`, `linux/page_frag_cache.h`.
• Detected declarations: `function page_frag_pop_thread`, `function page_frag_push_thread`, `function page_frag_test_init`, `function page_frag_test_exit`, `module init page_frag_test_init`.
• Atlas domain: Support Tooling And Documentation / tools.
• 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.