Re: [PATCH 5/5] KVM: nVMX: Enable nested posted interrupt processing.

[Paolo Bonzini]

On 20/01/2015 08:54, Wincy Van wrote:
> On Tue, Jan 20, 2015 at 3:34 PM, Paolo Bonzini <pbonzini@xxxxxxxxxx> wrote:
>>> Hence, we can disable local interrupts while delivering nested posted
>>> interrupts to make sure
>>> we are faster than the destination vcpu. This is a bit tricky but it
>>> an avoid that race. I think we
>>> do not need to add a spin lock here. RCU does not fit this case, since
>>> it will introduce a
>>> new race window between the rcu handler and handle_vmptr**.
>>>
>>> I am wondering that whether there is a better way : )
>>
>> Why not just use a spinlock?
>>
> 
> Hmm.. it seems that using a spinlock is the best way.
> I think we can drop the local_irq_save and use a spinlock instead.
> I can send v2 if it is necessary, any more ideas?

Yes, please send v2 of this patch only.

Paolo
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