Re: Scenario TREE07 with CONFIG_PREEMPT_DYNAMIC=n?

Frederic Weisbecker
2022-03-11T11:08:25Z

On Thu, Mar 10, 2022 at 01:56:30PM -0800, Paul E. McKenney wrote:
> Hello, Frederic,
>
> I recently added CONFIG_PREEMPT_DYNAMIC=n to the TREE07 file, and since
> then am getting roughly one RCU CPU stall warning (or silent hang)
> per few tens of hours of rcutorture testing on dual-socket systems.
> The stall warnings feature starvation of RCU grace-period kthread.
>
> Any advice on debugging this?
>
> Thanx, Paul

Ok it reproduces easily but I have no clue about the origin. I'm starting a
bisection.

Thanks!