intqueue_work_on(intcpu,structworkqueue_struct*wq,structwork_struct*work); 3.3 queue_delayed_work queue_delayed_work会在任务提交到工作队列之前等待一段时间,由delay参数来指定。 ]intqueue_delayed_work(structworkqueue_struct*wq,structdelayed_work*dwork,unsignedlongdelay); 3.4 queue_delayed_work_on que...
queue_delayed_work 跟schedule_delayed_work 类似,区别在于schedule_delayed_work 是在系统默认的工作队列上执行一个work,queue_delayed_work需要自行指定工作队列。类似地,schedule_delayed_work也是依赖于queue_delayed_work实现的。 staticinlineboolschedule_delayed_work(structdelayed_work*dwork,unsignedlongdelay){retur...
#include <linux/workqueue.h>structdelayed_work {structwork_struct work;structtimer_list timer;/*target workqueue and CPU ->timer uses to queue ->work*/structworkqueue_struct *wq;intcpu; }; 一struct delayed_work 我们可以通过如下函数调度一个delayed_work在指定的延时后执行: int schedule_delayed_w...
其实,schedule_work是利用queue_work实现的,例如系统默认的工作队列system_wq: staticinlineboolschedule_work(structwork_struct *work){returnqueue_work(system_wq, work); } queue_delayed_work 跟schedule_delayed_work 类似,区别在于schedule_delayed_work 是在系统默认的工作队列上执行一个work,queue_delayed_work...
struct delayed_work{struct work_struct work;struct timer_list timer;};intschedule_delayed_work(struct delayed_work*dwork,unsigned long delay/*jiffies*/){returnqueue_delayed_work(system_wq,dwork,delay);}#defineDECLARE_DELAYED_WORK(n,f)\
等待队列(waitqueue) linux驱动中,阻塞一般就是用等待队列来实现,将进程停止在此处并睡眠下,直到条件满足时,才可通过此处,继续运行。在睡眠等待期间,wake up时,唤起来检查条件,条件满足解除阻塞,不满足继续睡下去。 工作队列(workqueue) 工作队列,将一个work提交到workqueue上,而这个workqueue是挂到一个特殊内核进程上...
structdelayed_workdwork;/* work item used for writeback */ unsignedlongdirty_sleep;/* last wait */ structlist_headbdi_node;/* anchored at bdi->wb_list */ }; //描述一个回写任务 structwb_writeback_work{ longnr_pages;//待回写页面数量; ...
--> 运行queue:queue_delayed_work(test_workqueue, &test_delayed_work, delay_time); // 定义在:kernel/workqueue.c, 其中delay_time是延迟多少时间来运行queue。 注: 在test_workqueu_func中一定要再次将delayed_workqueue加入queue中,即再次运行queue_delayed_work。否则,此queue只运行一次。
问何时使用linux内核add_timer与queue_delayed_workENTips : OOM(Out Of Memory) killer机制是指Linux...
queue_work(mtk_tpd_wq, &work); } 1. 2. 3. 4. 在模块exit函数中,注销workqueue_struct destroy_workqueue(mtk_tpd_wq); 1. ===定时处理delayed_work=== delayed_work是在work_struct的基础上加了个timer_list,用于做时间上调度处理。 typedef struct { ... struct delayed_work x_work...