Re: [PATCH tip/core/rcu 1/9] rcu: Provide GP ordering in face of migrations and delays

[Peter Zijlstra]

On Thu, Oct 05, 2017 at 09:19:09AM -0700, Paul E. McKenney wrote:
> 
> Yes, the ordering does need to be visible to uninvolved CPUs, so
> release-acquire is not necessarily strong enough.

Why? Because I'm not at all seeing why it needs more. Your Changelog
doesn't provide enough hints.