Re: [PATCH v2] sched/topology: Allow sched_asym_cpucapacity to be disabled

On 15/10/2019 12:56, Quentin Perret wrote:

Hmm, a problem here is that static_branch*() can block (it uses a mutex) while you're in the rcu section, I think.

I suppose you could just move this above rcu_read_lock() and use rcu_access_pointer() instead ?

Right, I got confused again, the only problem is with the rcu_read_lock(), so the increment is fine but the decrement isn't.

Let me try this again with more coffee.

Thanks, Quentin