(In reply to Michal Hocko from comment #7) > (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). Ok, I'm preparing that.