[PATCH V2 3/5] kvm/ppc/book3s_hv: Implement halt polling in the kvm_hv kernel module

[David Matlack]

On Mon, Jul 11, 2016 at 10:07 AM, Paolo Bonzini <pbonzini at redhat.com> wrote:
>
>
> On 11/07/2016 18:57, David Matlack wrote:
>> On Mon, Jul 11, 2016 at 12:08 AM, Suraj Jitindar Singh
>> <sjitindarsingh at gmail.com> wrote:
>> > This patch introduces new halt polling functionality into the kvm_hv kernel
>> > module. When a vcore is idle it will poll for some period of time before
>> > scheduling itself out.
>>
>> Is there any way to reuse the existing halt-polling code? Having two
>> copies risks them diverging over time.
>
> s/risks/guarantees/ :(
>
> Unfortunately, handling of the hardware threads in KVM PPC is a mess,
> and I don't think it's possible to remove the duplication.

Ah, ok. That's a shame.

>
> Paolo