Re: [RFC patch 2/5] smpboot: Provide infrastructure for percpu hotplug threads

Thomas Gleixner
2012-06-13T19:02:59Z

On Wed, 13 Jun 2012, Paul E. McKenney wrote:
> On Wed, Jun 13, 2012 at 11:00:54AM -0000, Thomas Gleixner wrote:
> > /* Now call notifier in preparation. */
> > cpu_notify(CPU_ONLINE | mod, hcpu);
> > + smpboot_unpark_threads(cpu);
>
> OK, RCU must use the lower-level interfaces, given that one of
> then CPU_ONLINE notifiers might invoke synchronize_rcu().

We can start the threads before the notifiers. There is no
restriction.

Thanks,

tglx