Hung Task Timeout

[Philipp Ittershagen]

On Wed, Apr 18, 2012 at 01:01:45PM +0530, mani wrote:
> I think in my case both the tasks wait in the wait_queue and never come to
> the TASK_RUNNING state.
> In case of the TASK_INTERRUPTIBLE, it will get scheduled (or put to run
> queue) in two cases only:-
> 1. If it receive any signal not before that (we are not sending any signal
> to the task so it will remain in the wait_queue)
> 2. we call a wake_up () call.
> otherwise there is no point in putting the task in run queue which has
> nothing to do.

Yes, correct. You should use TASK_INTERRUPTIBLE here, otherwise your kernel
thread cannot receive signals and you are not able to kill(1) your thread from
userspace or use kthread_stop() in the kernel.


Greetings,

  Philipp