kernel/sched/cpudeadline.h

File Facts

System

Linux kernel

Corpus path

kernel/sched/cpudeadline.h

Extension

.h

Size

557 bytes

Lines

25

Domain

Core OS

Bucket

Scheduler, Processes, Timers, Sync, And Syscalls

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
• linux/spinlock.h

Detected Declarations

• struct cpudl_item
• struct cpudl

Annotated Snippet

struct cpudl_item {
	u64			dl;
	int			cpu;
	int			idx;
};

struct cpudl {
	raw_spinlock_t		lock;
	int			size;
	cpumask_var_t		free_cpus;
	struct cpudl_item	*elements;
};

int  cpudl_find(struct cpudl *cp, struct task_struct *p, struct cpumask *later_mask);
void cpudl_set(struct cpudl *cp, int cpu, u64 dl);
void cpudl_clear(struct cpudl *cp, int cpu, bool online);
int  cpudl_init(struct cpudl *cp);
void cpudl_cleanup(struct cpudl *cp);

Annotation

• Immediate include surface: `linux/types.h`, `linux/spinlock.h`.
• Detected declarations: `struct cpudl_item`, `struct cpudl`.
• Atlas domain: Core OS / Scheduler, Processes, Timers, Sync, And Syscalls.
• 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.