Re: Internal vs. external barriers (was: Re: Interesting LKMM litmus test)

[Alan Stern]

On Fri, Jan 13, 2023 at 12:07:06PM -0800, Paul E. McKenney wrote:
> What Alan said!  You could even have distinct partially overlapping
> grace periods, as the Linux kernel actually does have courtesy of normal
> grace periods via synchronize_rcu() and expedited grace periods via
> synchronize_rcu_expedited().

Or just two different CPUs making overlapping calls to
synchronize_rcu().

Alan