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Rk3399 platform development series explanation (interruption) 13.10, workqueue work queue
2022-07-07 06:09:00 【Kernel notes】
platform | Kernel version | Android version |
---|---|---|
RK3399 | Linux4.4 | Android7.1 |
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precipitation 、 Share 、 grow up , Let yourself and others have something to gain !
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
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