Blame view
kernel/sched_idletask.c
2.99 KB
fa72e9e48 sched: cfs core, ... |
1 2 3 4 5 6 |
/* * idle-task scheduling class. * * (NOTE: these are not related to SCHED_IDLE tasks which are * handled in sched_fair.c) */ |
e7693a362 sched: de-SCHED_O... |
7 8 9 10 11 12 |
#ifdef CONFIG_SMP static int select_task_rq_idle(struct task_struct *p, int sync) { return task_cpu(p); /* IDLE tasks as never migrated */ } #endif /* CONFIG_SMP */ |
fa72e9e48 sched: cfs core, ... |
13 14 15 |
/* * Idle tasks are unconditionally rescheduled: */ |
15afe09bf sched: wakeup pre... |
16 |
static void check_preempt_curr_idle(struct rq *rq, struct task_struct *p, int sync) |
fa72e9e48 sched: cfs core, ... |
17 18 19 |
{ resched_task(rq->idle); } |
fb8d47240 sched: remove the... |
20 |
static struct task_struct *pick_next_task_idle(struct rq *rq) |
fa72e9e48 sched: cfs core, ... |
21 22 |
{ schedstat_inc(rq, sched_goidle); |
dce48a84a sched, timers: mo... |
23 24 |
/* adjust the active tasks as we might go into a long sleep */ calc_load_account_active(rq); |
fa72e9e48 sched: cfs core, ... |
25 26 27 28 29 30 31 32 |
return rq->idle; } /* * It is not legal to sleep in the idle task - print a warning * message if some code attempts to do it: */ static void |
f02231e51 sched: remove the... |
33 |
dequeue_task_idle(struct rq *rq, struct task_struct *p, int sleep) |
fa72e9e48 sched: cfs core, ... |
34 35 36 37 38 39 40 |
{ spin_unlock_irq(&rq->lock); printk(KERN_ERR "bad: scheduling from the idle thread! "); dump_stack(); spin_lock_irq(&rq->lock); } |
31ee529cc sched: remove the... |
41 |
static void put_prev_task_idle(struct rq *rq, struct task_struct *prev) |
fa72e9e48 sched: cfs core, ... |
42 43 |
{ } |
681f3e685 sched: isolate SM... |
44 |
#ifdef CONFIG_SMP |
430106592 sched: simplify m... |
45 |
static unsigned long |
fa72e9e48 sched: cfs core, ... |
46 |
load_balance_idle(struct rq *this_rq, int this_cpu, struct rq *busiest, |
e1d1484f7 sched: reduce bal... |
47 48 49 50 51 52 53 54 55 56 |
unsigned long max_load_move, struct sched_domain *sd, enum cpu_idle_type idle, int *all_pinned, int *this_best_prio) { return 0; } static int move_one_task_idle(struct rq *this_rq, int this_cpu, struct rq *busiest, struct sched_domain *sd, enum cpu_idle_type idle) |
fa72e9e48 sched: cfs core, ... |
57 58 59 |
{ return 0; } |
681f3e685 sched: isolate SM... |
60 |
#endif |
fa72e9e48 sched: cfs core, ... |
61 |
|
8f4d37ec0 sched: high-res p... |
62 |
static void task_tick_idle(struct rq *rq, struct task_struct *curr, int queued) |
fa72e9e48 sched: cfs core, ... |
63 64 |
{ } |
83b699ed2 sched: revert rec... |
65 66 67 |
static void set_curr_task_idle(struct rq *rq) { } |
cb4698450 sched: RT-balance... |
68 69 70 71 72 73 74 |
static void switched_to_idle(struct rq *rq, struct task_struct *p, int running) { /* Can this actually happen?? */ if (running) resched_task(rq->curr); else |
15afe09bf sched: wakeup pre... |
75 |
check_preempt_curr(rq, p, 0); |
cb4698450 sched: RT-balance... |
76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 |
} static void prio_changed_idle(struct rq *rq, struct task_struct *p, int oldprio, int running) { /* This can happen for hot plug CPUS */ /* * Reschedule if we are currently running on this runqueue and * our priority decreased, or if we are not currently running on * this runqueue and our priority is higher than the current's */ if (running) { if (p->prio > oldprio) resched_task(rq->curr); } else |
15afe09bf sched: wakeup pre... |
92 |
check_preempt_curr(rq, p, 0); |
cb4698450 sched: RT-balance... |
93 |
} |
fa72e9e48 sched: cfs core, ... |
94 95 96 |
/* * Simple, special scheduling class for the per-CPU idle tasks: */ |
2abdad0a4 sched: make rt_sc... |
97 |
static const struct sched_class idle_sched_class = { |
5522d5d5f sched: mark sched... |
98 |
/* .next is NULL */ |
fa72e9e48 sched: cfs core, ... |
99 100 101 102 103 104 105 106 107 |
/* no enqueue/yield_task for idle tasks */ /* dequeue is not valid, we print a debug message there: */ .dequeue_task = dequeue_task_idle, .check_preempt_curr = check_preempt_curr_idle, .pick_next_task = pick_next_task_idle, .put_prev_task = put_prev_task_idle, |
681f3e685 sched: isolate SM... |
108 |
#ifdef CONFIG_SMP |
4ce72a2c0 sched: add CONFIG... |
109 |
.select_task_rq = select_task_rq_idle, |
fa72e9e48 sched: cfs core, ... |
110 |
.load_balance = load_balance_idle, |
e1d1484f7 sched: reduce bal... |
111 |
.move_one_task = move_one_task_idle, |
681f3e685 sched: isolate SM... |
112 |
#endif |
fa72e9e48 sched: cfs core, ... |
113 |
|
83b699ed2 sched: revert rec... |
114 |
.set_curr_task = set_curr_task_idle, |
fa72e9e48 sched: cfs core, ... |
115 |
.task_tick = task_tick_idle, |
cb4698450 sched: RT-balance... |
116 117 118 |
.prio_changed = prio_changed_idle, .switched_to = switched_to_idle, |
fa72e9e48 sched: cfs core, ... |
119 120 |
/* no .task_new for idle tasks */ }; |