Re: [RFC -v3 PATCH 2/3] sched: add yield_to function

Peter Zijlstra
2011-01-04T17:08:10Z

On Wed, 2011-01-05 at 00:51 +0800, Hillf Danton wrote:
> Where is the yield_to callback in the patch for RT schedule class?
> If @p is RT, what could you do?

RT guests are a pipe dream, you first need to get the hypervisor (kvm in
this case) to be RT, which it isn't. Then you either need to very
statically set-up the host and the guest scheduling constraints (not
possible with RR/FIFO) or have a complete paravirt RT scheduler which
communicates its requirements to the host.