* Peter Zijlstra (a.p.zijls...@chello.nl) wrote: > On Wed, 2010-12-01 at 09:17 -0800, Chris Wright wrote: > > Directed yield and fairness don't mix well either. You can end up > > feeding the other tasks more time than you'll ever get back. > > If the directed yield is always to another task in your cgroup then > inter-guest scheduling fairness should be maintained. > > Yes, but not the inter-vcpu fairness.
That same vcpu doesn't get fair scheduling if it spends its entire timeslice spinning on a lock held by a de-scheduled vcpu.
