Re: [RFC -v5 PATCH 2/4] sched: Add yield_to(task, preempt) functionality.

Peter Zijlstra
2011-01-14T17:16:05Z

On Fri, 2011-01-14 at 03:03 -0500, Rik van Riel wrote:
> From: Mike Galbraith <efault@gmx.de>
>
> Currently only implemented for fair class tasks.
>
> Add a yield_to_task method() to the fair scheduling class. allowing the
> caller of yield_to() to accelerate another thread in it's thread group,
> task group.
>
> Implemented via a scheduler hint, using cfs_rq->next to encourage the
> target being selected. We can rely on pick_next_entity to keep things
> fair, so noone can accelerate a thread that has already used its fair
> share of CPU time.
>
> This also means callers should only call yield_to when they really
> mean it. Calling it too often can result in the scheduler just
> ignoring the hint.
>
> Signed-off-by: Rik van Riel <riel@redhat.com>
> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
> Signed-off-by: Mike Galbraith <efault@gmx.de>

Looks good to me, do you want me to merge this or will you merge it
through the kvm tree with all other patches?