Re: [RFC PATCH 0/2] KVM: Support Heterogeneous RT VCPU Configurations.

From: Peter Zijlstra
Date: Wed Jul 28 2021 - 06:46:48 EST

On Wed, Jul 28, 2021 at 07:32:53AM -0300, Marcelo Tosatti wrote:
> Peter, not sure what exactly are you thinking of? (to solve this
> particular problem with pv deadline scheduling).
> Shouldnt it be possible to, through paravirt locks, boost the priority
> of the non-RT vCPU (when locking fails in the -RT vCPU) ?

No. Static priority scheduling does not compose. Any scheme that relies
on the guest behaving 'nice' is unacceptable.