try_to_wake

函数名称：ry_to_wake_up - wake up a thread*@p: the thread to be awakened*@state: the mask of task states that can be woken*@wake_flags: wake modifier flags (WF_*)* If (@state & @p->state) @p->state = TASK_RUNNING.

函数原型：static int try_to_wake_up(struct task_struct *p, unsigned int state, int wake_flags)

返回类型：int

参数：

类型	参数	名称
struct task_struct *	p
unsigned int	state
int	wake_flags

2521

success等于0

2523

禁止抢占()

2524

如果p恒等于当前进程则

2536

如果非任务状态按位与state的值则转到:out

2539

success等于1

2540

cpu等于task_cpu(p)

2541

Tracepoint called when waking a task; this tracepoint is guaranteed to be* called from the waking context.

2542

任务状态等于就绪态

2543

Tracepoint called when the task is actually woken; p->state == TASK_RUNNNG.* It it not always called from the waking context.

2544

转到:out

2553

raw_spin_lock_irqsave( & Protection of the PI data structures: , flags)

2554

smp_mb__after_spinlock() provides the equivalent of a full memory barrier* between program-order earlier lock acquisitions and program-order later* memory accesses()

2555

如果非任务状态按位与state的值则转到:unlock

2558

Tracepoint called when waking a task; this tracepoint is guaranteed to be* called from the waking context.

2561

success等于1

2562

cpu等于task_cpu(p)

2584

smp_rmb()

2585

如果归属队列且Called in case the task @p isn't fully descheduled from its runqueue,* in this case we must do a remote wakeup. Its a 'light' wakeup though,* since all we need to do is flip p->state to TASK_RUNNING, since* the task is still ->on_rq.则转到:unlock

2638

如果in_iowait则

2639

delayacct_blkio_end(p)

2640

atomic_dec( & nr_iowait)

2645

ttwu_queue(p, cpu, wake_flags)

2646

unlock :

2647

raw_spin_unlock_irqrestore( & Protection of the PI data structures: , flags)

2648

out :

2649

如果success则ttwu_stat(p, cpu, wake_flags)

2651

禁用抢占和中断()

2653

返回:success

**调用者**
名称	描述
wake_up_process	唤醒中断线程
wake_up_state
default_wake_function

源代码转换工具开放的插件接口	X
支持：c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现：逻辑报告代码生成和批量转换代码

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