Re: [PATCH][retry 3] Add support for Pause Filtering to AMD SVM

Peter Zijlstra
2009-05-20T08:42:33Z

On Wed, 2009-05-20 at 11:38 +0300, Avi Kivity wrote:
> Peter Zijlstra wrote:
> > That said, I still thoroughly dislike this whole approach.
> >
>
> Can you explain why? We have a thread that has detected that it's
> spinning. Keeping on spinning is a waste of cpu time. Why not let
> something else use the cpu?

Because its a polling interface. I much prefer it if we were to get a
wakeup notification when the vcpu holding the lock releases it.