Re: [RFC patch 2/5] smpboot: Provide infrastructure for percpu hotplug threads

Paul E. McKenney
2012-06-14T14:47:56Z

On Thu, Jun 14, 2012 at 03:01:27PM +0200, Peter Zijlstra wrote:
> On Thu, 2012-06-14 at 05:59 -0700, Paul E. McKenney wrote:
> > Yep, starvation.
>
> What's the particular starvation case?

RCU callback processing consumes the entire CPU in RCU_BOOST case where
processing runs at real-time priority. This is analogous to RT throttling
in the scheduler.

Thanx, Paul