Comment # 7 on bug 1185518 from Michal Hocko

(In reply to Frederic Weisbecker from comment #6)
> (In reply to Michal Hocko from comment #5)
> > I do not remember the exact form this got in the end but do we have a way to
> > have PREEMPT_NONE behavior by default without adding a kernel command line
> > option with PREEMPT=y?
> 
> No indeed and other people outside recently asked me for that.
> I can submit a patch for that if you like.

Yeah, I believe we need that for a smooth transition. If we want to merge all
preempt model kernel flavors then we have to have a way to keep the original
mode. Override is easily possible via kernel command line but the default
should stay (this would be voluntary for kernel default on x86, but none for
SLES).