kernel/rcu/refscale.c

File Facts

System

Linux kernel

Corpus path

kernel/rcu/refscale.c

Extension

.c

Size

38556 bytes

Lines

1593

Domain

Core OS

Bucket

Scheduler, Processes, Timers, Sync, And Syscalls

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/atomic.h
• linux/bitops.h
• linux/completion.h
• linux/cpu.h
• linux/delay.h
• linux/err.h
• linux/init.h
• linux/interrupt.h
• linux/kthread.h
• linux/kernel.h
• linux/mm.h
• linux/module.h
• linux/moduleparam.h
• linux/notifier.h
• linux/percpu.h
• linux/rcupdate.h
• linux/rcupdate_trace.h
• linux/reboot.h
• linux/sched.h
• linux/seq_buf.h
• linux/spinlock.h
• linux/smp.h
• linux/stat.h
• linux/srcu.h
• linux/slab.h
• linux/torture.h
• linux/types.h
• linux/sched/clock.h
• rcu.h

Detected Declarations

• struct reader_task
• struct ref_scale_ops
• struct refscale_typesafe
• function un_delay
• function ref_rcu_read_section
• function ref_rcu_delay_section
• function rcu_sync_scale_init
• function srcu_ref_scale_read_section
• function srcu_ref_scale_delay_section
• function srcu_fast_sync_scale_init
• function srcu_fast_ref_scale_read_section
• function srcu_fast_ref_scale_delay_section
• function srcu_fast_updown_sync_scale_init
• function srcu_fast_updown_ref_scale_read_section
• function srcu_fast_updown_ref_scale_delay_section
• function rcu_tasks_ref_scale_read_section
• function rcu_tasks_ref_scale_delay_section
• function rcu_trace_ref_scale_read_section
• function rcu_trace_ref_scale_delay_section
• function ref_refcnt_section
• function ref_refcnt_delay_section
• function ref_percpuinc_section
• function ref_percpuinc_delay_section
• function ref_incpercpu_section
• function ref_incpercpu_delay_section
• function ref_incpercpupreempt_section
• function ref_incpercpupreempt_delay_section
• function ref_incpercpubh_section
• function ref_incpercpubh_delay_section
• function ref_incpercpuirqsave_section
• function ref_incpercpuirqsave_delay_section
• function ref_rwlock_init
• function ref_rwlock_section
• function ref_rwlock_delay_section
• function ref_rwsem_init
• function ref_rwsem_section
• function ref_rwsem_delay_section
• function ref_lock_section
• function ref_lock_delay_section
• function ref_lock_irq_section
• function ref_lock_irq_delay_section
• function ref_acqrel_section
• function ref_acqrel_delay_section
• function ref_sched_clock_section
• function ref_sched_clock_delay_section
• function ref_clock_section
• function ref_clock_delay_section
• function ref_jiffies_section

Annotated Snippet

module_init(ref_scale_init);
module_exit(ref_scale_cleanup);

Annotation

• Immediate include surface: `linux/atomic.h`, `linux/bitops.h`, `linux/completion.h`, `linux/cpu.h`, `linux/delay.h`, `linux/err.h`, `linux/init.h`, `linux/interrupt.h`.
• Detected declarations: `struct reader_task`, `struct ref_scale_ops`, `struct refscale_typesafe`, `function un_delay`, `function ref_rcu_read_section`, `function ref_rcu_delay_section`, `function rcu_sync_scale_init`, `function srcu_ref_scale_read_section`, `function srcu_ref_scale_delay_section`, `function srcu_fast_sync_scale_init`.
• Atlas domain: Core OS / Scheduler, Processes, Timers, Sync, And Syscalls.
• 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.