Re: [RFC -v2 PATCH 2/3] sched: add yield_to function

Mike Galbraith
2010-12-20T10:50:44Z

On Mon, 2010-12-20 at 12:49 +0200, Avi Kivity wrote:
> On 12/20/2010 12:46 PM, Mike Galbraith wrote:
> > >
> > > However, if I'm all alone on my cpu, and the other task is runnable but
> > > not running, behind some unrelated task, then I do need that task to be
> > > preempted (or to move tasks around).
> >
> > So in that case, a pull may be advantageous.
>
> Yes.
>
> > > > Would a kick/hint option be useful?
> > >
> > > Depends on what it does...
> >
> > Let you decide whether you only want to drop a hint and leave it at
> > that, or also attempt a preemption.
>
> Who is "you" in this? the scheduler?

The caller.

> I'm fine with hints so long as they are usually acted upon (if it isn't,
> I'll go back to the guest, spin a bit more, and retry).