我正在学习工作队列来编写linux内核中的下半部分。
我想知道:如果中断处理程序执行了两次(因此调用schedule_work
两次),工作队列处理程序是否被调用一次或两次?
答案 0 :(得分:1)
看起来您的答案在该功能的评论中。
/**
* schedule_work - put work task in global workqueue
* @work: job to be done
*
* Returns zero if @work was already on the kernel-global workqueue and
* non-zero otherwise.
*
* This puts a job in the kernel-global workqueue if it was not already
* queued and leaves it in the same position on the kernel-global
* workqueue otherwise.
*/
int schedule_work(struct work_struct *work)
{
return queue_work(keventd_wq, work);
}