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    SubjectRe: [RFC PATCH v1 3/5] KVM: Add paravirt kvm_flush_tlb_others
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    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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