Struct GlobalSchedState 

pub struct GlobalSchedState { /* private fields */ }

Global task registry : cold path: fork, exit, all_tasks scan.

Lock order: acquire GLOBAL_SCHED_STATE before LOCAL when both are needed. Per-CPU runqueues and current-task tracking live in LOCAL_SCHEDULERS. Blocked tasks are tracked in BLOCKED_TASKS (separate lock). Identity maps (PID/TID, pgid, sid, parent/child) are in SCHED_IDENTITY (separate lock). This struct holds only data that is accessed by cold paths (fork, exit, all_tasks scan, zombie management, wake deadlines) and is protected by the GLOBAL_SCHED_STATE lock.

Implementations

impl GlobalSchedState

pub fn new() -> Self

Create a new global scheduler state (no per-CPU runqueues : those live in LOCAL_SCHEDULERS).

pub fn add_task(&mut self, task: Arc<Task>) -> Option<usize>

Add a task to the scheduler

pub fn add_task_with_parent( &mut self, task: Arc<Task>, parent: TaskId, ) -> Option<usize>

Performs the add task with parent operation.

pub fn clear_task_wake_deadline_locked(&mut self, id: TaskId) -> bool

Performs the clear task wake deadline locked operation.

pub fn set_task_wake_deadline_locked( &mut self, id: TaskId, deadline: u64, ) -> bool

Sets task wake deadline locked.

pub fn wake_task_locked(&mut self, id: TaskId) -> (bool, Option<usize>)

Performs the wake task locked operation.

Returns (was_woken, ipi_cpu). The caller must send a resched IPI to ipi_cpu after releasing the scheduler lock.

NOTE: blocked_tasks lives in the separate BLOCKED_TASKS lock. This method now only handles the fallback path (task not yet blocked, set wake_pending). The primary wake path is in wake_task().

pub fn try_reap_child_locked( &mut self, parent: TaskId, target: Option<TaskId>, ) -> WaitChildResult

Attempts to reap child locked. If target is Some(tid), only reaps that child; otherwise, reaps any child. Returns WaitChildResult indicating the outcome. Must be called with the scheduler lock held.

pub fn migrate_ready_tasks_for_new_class_table(&mut self)

Performs the migrate ready tasks for new class table operation.