Hung Task Timeout

[manishrma@gmail.com (mani)]

Hi All,

How kernel scheduler treats task's TASK_UNINTERRUPTIBLE &
TASK_INTERREPTIBLE states ?

Actually in my case i have created a kernel thread and it is waiting on an
event as per below :-

wait_event(queue, flag);

in the above condition it gives me hung task timeout dump as it puts the
task in TASK_UNINTERRUPTIBLE state
whereas if i change the function call to

wait_event_interruptible(queue, flag);
It works fine as the task is in TASK_INTERREPTIBLE state

I have checked in the kernel [kernel/hung_task.c ] check_hung_task()
It says that

    /*
     * Ok, the task did not get scheduled for more than 2 minutes,
     * complain:
     */
So is that means that TASK_UNINTERRUPTIBLE will not get schedule by the
scheduler ?
Can anyone give the detail information what's going on in backyard ?


Thanks
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