On Thu, 19 Oct 2023 14:44:52 +0530, Srikar Dronamraju wrote:

PowerVM Hypervisor dispatches on a whole core basis. In a shared LPAR, a
CPU from a core that is CEDED or preempted may have a larger latency. In
such a scenario, its preferable to choose a different CPU to run.

If one of the CPUs in the core is active, i.e neither CEDED nor
preempted, then consider this CPU as not preempted.

[...]

Applied to powerpc/next.

[1/1] powerpc/paravirt: Improve vcpu_is_preempted
      https://git.kernel.org/powerpc/c/efce8422dd53fae6cdbd37741034ac4eb4730819

cheers