Should we be using CONFIG_PREEMPT_BKL in the Fedora kernel?
Pete Zaitcev
zaitcev at redhat.com
Sat Mar 24 18:23:10 UTC 2007
On Sat, 24 Mar 2007 17:56:17 +0100, Ingo Molnar <mingo at elte.hu> wrote:
> > > FWIW, I have taken to CONFIG_PREEMPT=y in my hacking kernels because
> > > it exposed on my clunky test machines bugs that were otherwise
> > > reproduced only on big honking machines with lots of parallelism.
> > > [...]
> >
> > It helps with that, but I just don't trust it to work at all times.
> > It's a really kludgy code from MontaVista, developed with embedded
> > devices in mind. It's a certified miracle that it boots on SMP at all.
>
> actually, the current code works pretty well - and has been brought to
> the extreme via PREEMPT_RT. It boots fine on SMP and elsewhere, and it
> finds us tons of bugs in every kernel release.
If you say so, I take it back.
-- Pete
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