On Tue, 2012-05-01 at 18:39 +0300, Avi Kivity wrote:
> > rcu_read_{,un}lock_sched() -- aka preempt_{en,dis}able()
> > call_rcu_sched()
> > synchronize_rcu_sched() -- aka synchronize_sched();
> >
> > Define an RCU variant where each cpu has to have scheduled at least once
> > to complete a grace period.
>
> Which was the original rcu implementation, until it got replaced by
> preemptible rcu, yes? I guess that was the source of my confusion.
Indeed. The _sched RCU variant has the 'classic' RCU semantics.
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