Rk3399 platform development series explanation (interruption) 13.10, workqueue work queue

platform	Kernel version	Android version
RK3399	Linux4.4	Android7.1

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Work queue mechanism （workqueue) Yes, except for soft interrupts and tasklet The most commonly used lower half mechanism outside . The basic principle of work queue is to put work( Functions that need to be deferred ） It is executed by a kernel thread , It's always in Execute in process context .

The advantage of work queues is to use the process context to perform the lower half of the interrupt , So work queues allow rescheduling and sleep , Is the process context of asynchronous execution , In addition, it can also solve soft interrupts and tasklet Execution time