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fa72e9e sched: cfs core, kernel/sched_idletask.c
Ingo Molnar authored
1 /*
2 * idle-task scheduling class.
3 *
4 * (NOTE: these are not related to SCHED_IDLE tasks which are
5 * handled in sched_fair.c)
6 */
7
8 /*
9 * Idle tasks are unconditionally rescheduled:
10 */
11 static void check_preempt_curr_idle(struct rq *rq, struct task_struct *p)
12 {
13 resched_task(rq->idle);
14 }
15
fb8d472 sched: remove the 'u64 now' parameter from ->pick_next_task()
Ingo Molnar authored
16 static struct task_struct *pick_next_task_idle(struct rq *rq)
fa72e9e sched: cfs core, kernel/sched_idletask.c
Ingo Molnar authored
17 {
18 schedstat_inc(rq, sched_goidle);
19
20 return rq->idle;
21 }
22
23 /*
24 * It is not legal to sleep in the idle task - print a warning
25 * message if some code attempts to do it:
26 */
27 static void
f02231e sched: remove the 'u64 now' parameter from ->dequeue_task()
Ingo Molnar authored
28 dequeue_task_idle(struct rq *rq, struct task_struct *p, int sleep)
fa72e9e sched: cfs core, kernel/sched_idletask.c
Ingo Molnar authored
29 {
30 spin_unlock_irq(&rq->lock);
31 printk(KERN_ERR "bad: scheduling from the idle thread!\n");
32 dump_stack();
33 spin_lock_irq(&rq->lock);
34 }
35
36 static void put_prev_task_idle(struct rq *rq, struct task_struct *prev, u64 now)
37 {
38 }
39
4301065 @pwil3058 sched: simplify move_tasks()
pwil3058 authored
40 static unsigned long
fa72e9e sched: cfs core, kernel/sched_idletask.c
Ingo Molnar authored
41 load_balance_idle(struct rq *this_rq, int this_cpu, struct rq *busiest,
42 unsigned long max_nr_move, unsigned long max_load_move,
43 struct sched_domain *sd, enum cpu_idle_type idle,
a4ac01c @pwil3058 sched: fix bug in balance_tasks()
pwil3058 authored
44 int *all_pinned, int *this_best_prio)
fa72e9e sched: cfs core, kernel/sched_idletask.c
Ingo Molnar authored
45 {
46 return 0;
47 }
48
49 static void task_tick_idle(struct rq *rq, struct task_struct *curr)
50 {
51 }
52
53 /*
54 * Simple, special scheduling class for the per-CPU idle tasks:
55 */
56 static struct sched_class idle_sched_class __read_mostly = {
57 /* no enqueue/yield_task for idle tasks */
58
59 /* dequeue is not valid, we print a debug message there: */
60 .dequeue_task = dequeue_task_idle,
61
62 .check_preempt_curr = check_preempt_curr_idle,
63
64 .pick_next_task = pick_next_task_idle,
65 .put_prev_task = put_prev_task_idle,
66
67 .load_balance = load_balance_idle,
68
69 .task_tick = task_tick_idle,
70 /* no .task_new for idle tasks */
71 };
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