Re: [PATCH 6/6] sched: disabled rt-bandwidth by default

Andi Kleen
2008-08-28T11:48:16Z

On Thu, Aug 28, 2008 at 01:19:13PM +0200, Peter Zijlstra wrote:
> On Thu, 2008-08-28 at 13:09 +0200, Andi Kleen wrote:
> > > Even if the system has multiple CPUs, and even if just a single CPU is
> > > fully utilized by an RT task, without the rt-limit the system will still
> > > lock up in practice due to various other factors: workqueues and tasks
> > > being 'stuck' on CPUs that host an RT hog.
> >
> > The load balancer will not notice that a particular CPU is busy
> > with real time tasks?
>
> Not currently, working on that though.

I wonder if it would make sense to break affinities in extreme case?
With that even the workqueues would work again.

-Andi

--
ak@linux.intel.com