Re: [PATCH v8 8/8] rcu/tree: Setschedule gp ktread to SCHED_FIFO outside of atomic region

[Peter Zijlstra]

On Fri, Jun 28, 2019 at 10:06:18AM +0200, Juri Lelli wrote:
> sched_setscheduler() needs to acquire cpuset_rwsem, but it is currently
> called from an invalid (atomic) context by rcu_spawn_gp_kthread().
> 
> Fix that by simply moving sched_setscheduler_nocheck() call outside of
> the atomic region, as it doesn't actually require to be guarded by
> rcu_node lock.

Maybe move this earlier in the series such that the bug doesn't manifest
in bisection?