Re: [PATCH tip/core/rcu 07/23] rcu: Provide OOM handler to motivatelazy RCU callbacks

[Peter Zijlstra]

On Thu, 2012-08-30 at 11:18 -0700, Paul E. McKenney wrote:
> +       get_online_cpus();
> +       for_each_online_cpu(cpu)
> +               for_each_rcu_flavor(rsp)
> +                       smp_call_function_single(cpu, rcu_oom_notify_cpu,
> +                                                rsp, 1);
> +       put_online_cpus(); 

I guess blasting IPIs around is better than OOM but still.. do you
really need to wait for each cpu individually, or would a construct
using on_each_cpu() be possible, or better yet, on_each_cpu_cond()?
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