On 09/01/2015 15:54, Radim Krčmář wrote:
> There are two points relevant to this patch in new KVM's implementation,
> ("KVM: x86: amend APIC lowest priority arbitration",
> https://lkml.org/lkml/2015/1/9/362)
>
> 1) lowest priority depends on TPR
> 2) there is no need for balancing
>
> (1) has to be considered with PI as well.
The chipset doesn't support it. :(
> I kept (2) to avoid whining from people building on that behaviour, but
> lowest priority backed by PI could be transparent without it.
>
> Patch below removes the balancing, but I am not sure this is a price we
> allowed ourselves to pay ... what are your opinions?
I wouldn't mind, but it requires a lot of benchmarking.
Paolo
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