Il 14/03/2013 16:03, Jan Kiszka ha scritto:
>> > vcpu->srcu_idx = srcu_read_lock()
>> > idx = srcu_read_lock(&vcpu->kvm->srcu);
>> > srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
>> > vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
>> > srcu_read_unlock(&vcpu->kvm->srcu, idx);
>> > srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
>> >
>> > Not sure this is valid.
> Grmbl, likely not.
It might be.
Isn't it the same as two different CPUs doing
CPU 1 CPU 2
------------------------------------------------------------------------------------------------
vcpu->srcu_idx = srcu_read_lock()
idx = srcu_read_lock(&vcpu->kvm->srcu);
srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
srcu_read_unlock(&vcpu->kvm->srcu, idx);
srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
?
Paolo
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