I write a driver on tx2, using interrupt to let user know that transmission done is done.When it get an interrupt, it would use wake_up_interruptible() to wake up a queue, which is poll_wait in .poll function. I print before and after calling wake_up_interruptible() function. from the kernel message, I see that this function call needs about some milliseconds, usually 5-10ms. I also use it on a PC with the same ubuntu 16.04 system, the function only costs some microseconds (us). Is there some quick method to use interrupt?