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    SubjectRe: [tip:perf/core] perf: Per-pmu-per-cpu contexts
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    On Fri, 2010-09-10 at 08:37 -0700, Paul E. McKenney wrote:
    > > So, you say below that it works because synchronize_srcu(), that
    > > waits for qs after touching pmus, implies synchronize_sched(), right?
    >
    > Ook... My current plans to fold SRCU into TREE_RCU would invalidate
    > this assumption.
    >
    > Maybe we need some sort of primitive that concurrently waits for
    > multiple types of RCU grace periods?

    Nah, but I was thinking that any kind of preemptible rcu sync would
    imply a sched rcu sync.

    If not strictly implied I'd have no problem simply writing:

    synchronize_rcu_sched();
    synchronize_srcu();




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