Should we be using CONFIG_PREEMPT_BKL in the Fedora kernel?

[Ingo Molnar]

* Chuck Ebbert <cebbert at redhat.com> wrote:

> > Well, it's likely to remain around upstream so surely it's better to 
> > fix bugs and feed them back upstream than ignore this, it'll just be 
> > painful later on IMO :-)
> 
> Well yeah, but it's optional. We don't enable CONFIG_PREEMPT and 
> that's been there for a long time...

but CONFIG_PREEMPT has nontrivial overhead and impact. PREEMPT_BKL on 
the other hand has no overhead - in fact it helps on SMP, quite a bit at 
times.

	Ingo