On Tue, 8 Aug 2017 12:05:31 +0800
"Longpeng(Mike)" <longpe...@huawei.com> wrote:

> This is a simple optimization for kvm_vcpu_on_spin, the
> main idea is described in patch-1's commit msg.

I think this generally looks good now.

> I did some tests base on the RFC version, the result shows
> that it can improves the performance slightly.

Did you re-run tests on this version?

I would also like to see some s390 numbers; unfortunately I only have a
z/VM environment and any performance numbers would be nearly useless
there. Maybe somebody within IBM with a better setup can run a quick

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