# Re: \[RFC PATCH 09/18\] kthread: Make it easier to correctly sleep in iterant kthreads

- From: Steven Rostedt \<rostedt@goodmis.org\>
- Date: 2015-06-10 14:07:57 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2015/06/4512985
- Thread: https://ratatoskr.run/linux-nfs/2015/06/4510097/t.md

```text
On Wed, 10 Jun 2015 11:07:24 +0200
Peter Zijlstra [ref] wrote:

> > Not to mention, tasks in TASK_UNINTERRUPTIBLE state for too long will
> > trigger hung task detection.
> 
> Right, and I had not considered that, but it turns out the hung_task
> detector checks p->state == TASK_UNINTERRUPTIBLE, so TASK_IDLE is indeed
> safe from that.

Also, I would assume that TASK_IDLE only makes sense for kernel
threads, I wonder if we should add an assertion in schedule that
triggers if a task is scheduling with TASK_IDLE and is not a kernel
thread (has its own mm?)

-- Steve
```