include/uapi/linux/trace_mmap.h

File Facts

System

Linux kernel

Corpus path

include/uapi/linux/trace_mmap.h

Extension

.h

Size

1403 bytes

Lines

50

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

Dependency Surface

• linux/types.h

Detected Declarations

• struct trace_buffer_meta

Annotated Snippet

struct trace_buffer_meta {
	__u32		meta_page_size;
	__u32		meta_struct_len;

	__u32		subbuf_size;
	__u32		nr_subbufs;

	struct {
		__u64	lost_events;
		__u32	id;
		__u32	read;
	} reader;

	__u64	flags;

	__u64	entries;
	__u64	overrun;
	__u64	read;

	__u64	pages_lost;
	__u64	pages_touched;
};

#define TRACE_MMAP_IOCTL_GET_READER		_IO('R', 0x20)

#endif /* _TRACE_MMAP_H_ */

Annotation

• Immediate include surface: `linux/types.h`.
• Detected declarations: `struct trace_buffer_meta`.
• 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.