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.