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For systems using a sched_ext scheduler and has panic_on_rcu_stall enabled, try kicking out the current scheduler before issuing a panic. While there are numerous reasons for RCU CPU stalls that are not directly attributed to the scheduler, deferring the panic gives sched_ext an opportunity to provide additional debug info when ejecting the current scheduler. Also, handling the event more gracefully allows us to potentially recover the system instead of incurring additional down time. Suggested-by: Tejun Heo <tj@kernel.org> Reviewed-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: David Dai <david.dai@linux.dev> Signed-off-by: Tejun Heo <tj@kernel.org>