Re: [PATCH] [5/6] scheduler: Protect important kernel threads against normalize_rt

Andi Kleen
2007-10-08T13:08:37Z

On Monday 08 October 2007 14:43:50 Ingo Molnar wrote:
>
> * Andi Kleen <ak@suse.de> wrote:
>
> > softlockup is the same. Just think about it.
> >
> > If you ever renormalize it and then run a fifo thread it will starve
> > and then eventually kill the box.
> >
> > And starving CPU unplug is also equally bad.
>
> yeah, agreed. I ended up doing the change below.

I considered doing it this way too. But it means that if keventd
(or another workqueue thread) starts looping for some reason you cannot renormalize it.
Might be not a good thing and impact debuggability. I think it's better to only
protect special threads.

-Andi