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SubjectRe: [PATCH v4 RESEND 3/5] KVM: x86: hyperv: use get_vcpu_by_vpidx() in kvm_hv_flush_tlb()
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Roman Kagan <rkagan@virtuozzo.com> writes:

> On Tue, Sep 25, 2018 at 11:29:57AM +0200, Paolo Bonzini wrote:
>> On 25/09/2018 10:57, Roman Kagan wrote:
>> > If we can assume that in all relevant cases vp_index coincides with the
>> > cpu index (which I think we can) then Vitaly's approach is the most
>> > efficient.
>> >
>> > If, on the opposite, we want to optimize for random mapping between
>> > vp_index and cpu index, then it's probably better instead to iterate
>> > over vcpus and test if their vp_index belongs to the requested mask.
>>
>> Yes, that would work too. Perhaps we can do both? You can have a
>> kvm->num_mismatched_vp_indexes count to choose between the two.
>
> Makes sense to me.

Thanks guys,

I'll try to draft something up for v6.

--
Vitaly

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