Messages in this thread | | | From | Muni Sekhar <> | Date | Thu, 16 Jun 2016 18:19:17 +0530 | Subject | wait_event()\wake_up order fails? |
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Hi All,
I have a kernel thread THREAD_A and it waits for an event by calling wait_event() API.
Other thread THREAD_B wakes up the THREAD_A by calling wake_up() API.
In a concurrent execution, what if the wake_up() is called before THREAD_A entering into TASK_UNINTERRUPTIBLE sleep?
I have noticed in running long soak test, THREAD_A enters into TASK_UNINTERRUPTIBLE sleep and THREAD_B’s wake_up() not able to wake the THREAD_A, what might be the reason for this?
I would like to know in which scenario wake_up() fails to wake the sleeping thread?
-- Thanks, Sekhar
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