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

From: Peter Zijlstra
Date: Tue Jan 04 2011 - 12:08:08 EST

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.

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