kernel/rcu/tasks.h

File Facts

System

Linux kernel

Corpus path

kernel/rcu/tasks.h

Extension

.h

Size

54409 bytes

Lines

1610

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

• rcu_segcblist.h

Detected Declarations

• struct rcu_tasks
• struct rcu_tasks_percpu
• struct rcu_tasks
• struct rcu_tasks_test_desc
• function set_tasks_gp_state
• function cblist_init_generic
• function for_each_possible_cpu
• function rcu_tasks_lazy_time
• function call_rcu_tasks_generic_timer
• function call_rcu_tasks_iw_wakeup
• function call_rcu_tasks_generic
• function rcu_barrier_tasks_generic_cb
• function rcu_barrier_tasks_generic
• function rcu_tasks_need_gpcb
• function rcu_tasks_invoke_cbs
• function rcu_tasks_invoke_cbs_wq
• function rcu_tasks_one_gp
• function rcu_tasks_kthread
• function for_each_possible_cpu
• function synchronize_rcu_tasks_generic
• function rcu_spawn_tasks_kthread_generic
• function rcu_tasks_bootup_oddness
• function show_rcu_tasks_generic_gp_kthread
• function for_each_possible_cpu
• function rcu_tasks_torture_stats_print_generic
• function rcu_tasks_wait_gp
• function rcu_tasks_pregp_step
• function rcu_tasks_is_holdout
• function rcu_tasks_pertask
• function rcu_tasks_postscan
• function schedule
• function list_for_each_entry_safe
• function check_holdout_task
• function check_all_holdout_tasks
• function list_for_each_entry_safe
• function rcu_tasks_postgp
• function tasks_rcu_exit_srcu_stall
• function call_rcu_tasks
• function cond_resched_tasks_rcu_qs
• function rcu_barrier_tasks
• function rcu_spawn_tasks_kthread
• function show_rcu_tasks_classic_gp_kthread
• function rcu_tasks_torture_stats_print
• function rcu_tasks_get_gp_data
• function get_task_struct
• function exit_tasks_rcu_finish
• function exit_tasks_rcu_start
• function call_rcu_tasks_rude

Annotated Snippet

core_initcall(rcu_init_tasks_generic);

#else /* #ifdef CONFIG_TASKS_RCU_GENERIC */
static inline void rcu_tasks_bootup_oddness(void) {}
#endif /* #else #ifdef CONFIG_TASKS_RCU_GENERIC */

#ifdef CONFIG_TASKS_TRACE_RCU

////////////////////////////////////////////////////////////////////////
//
// Tracing variant of Tasks RCU.  This variant is designed to be used
// to protect tracing hooks, including those of BPF.  This variant
// is implemented via a straightforward mapping onto SRCU-fast.

DEFINE_SRCU_FAST(rcu_tasks_trace_srcu_struct);
EXPORT_SYMBOL_GPL(rcu_tasks_trace_srcu_struct);

#endif /* #else #ifdef CONFIG_TASKS_TRACE_RCU */

Annotation

• Immediate include surface: `rcu_segcblist.h`.
• Detected declarations: `struct rcu_tasks`, `struct rcu_tasks_percpu`, `struct rcu_tasks`, `struct rcu_tasks_test_desc`, `function set_tasks_gp_state`, `function cblist_init_generic`, `function for_each_possible_cpu`, `function rcu_tasks_lazy_time`, `function call_rcu_tasks_generic_timer`, `function call_rcu_tasks_iw_wakeup`.
• 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.