Re: [PATCH tip/core/rcu 8/9] nohz_full: Add full-system-idle state machine

Geert Uytterhoeven
2013-09-07T11:22:58Z

On Fri, Sep 6, 2013 at 8:50 PM, Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> On Fri, Sep 6, 2013 at 7:30 PM, Paul E. McKenney
> <paulmck@linux.vnet.ibm.com> wrote:
>>> Furthermore, it seems only hexagon, metag, mips, and x86 set NR_CPUS to 1
>>> if !SMP. On other architectures, NR_CPUS is not defined and presumed to be 0.
>>
>> Would it make sense to require that NR_CPUS=1 for !SMP?
>
> Yes, this looks reasonable to me.

Perhaps we can invert the logic and define only NR_CPUS in arch-specific
code, and derive SMP from NR_CPUS != 1 in generic code?

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds