Re: [patch 0/8] core, x86: Preparatory steps for RT

Thomas Gleixner
2019-07-27T06:16:15Z

On Fri, 26 Jul 2019, Steven Rostedt wrote:

> On Fri, 26 Jul 2019 23:19:36 +0200
> Thomas Gleixner <tglx@linutronix.de> wrote:
>
> > CONFIG_PREEMPTION is selected by CONFIG_PREEMPT and by
> > CONFIG_PREEMPT_RT. Both PREEMPT and PREEMPT_RT require the same
> > functionality which today depends on CONFIG_PREEMPT.
> >
> > The following series adjusts the core and x86 code to use
> > CONFIG_PREEMPTION where appropriate and extends the x86 dumpstack
> > implementation to display PREEMPT_RT instead of PREEMPT on a RT
> > enabled kernel.
> >
>
> Hmm, I'm looking at v5.3-rc1 and I don't see a CONFIG_PREEMPTION
> defined. And the first patch doesn't define it. Did I miss a patch
> series that adds it?

It came right after rc1. The initial commit renamed PREEMPT to PREEMPT_LL
and seletced PREEMPT, but that broke defconfigs and make olddefconfig :(

And in fact it was a good thing that I had to stare at all CONFIG_PREEMPT
dependencies. Found some interesting things already :)

Thanks,

tglx