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

On Wed, 10 Jun 2015 11:07:24 +0200
Peter Zijlstra [off-list ref] wrote:

quoted

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