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

[Peter Zijlstra]

On Tue, 2012-05-01 at 15:12 +0300, Avi Kivity wrote:
> local_irq_save() is a stronger version or rcu_read_lock()

Not so, local_irq_save() doesn't at all stop regular RCU grace periods,
things like preemptible rcu can be driven from rcu_read_unlock().

Note that this is the reason call_rcu_sched() exists and is used in this
case.
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