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    SubjectRe: [PATCH RFC] Simplify the Linux kernel by reducing its state space
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    Hi Paul,

    On Sat, Mar 31, 2012 at 18:33, Paul E. McKenney
    <paulmck@linux.vnet.ibm.com> wrote:
    > Although there have been numerous complaints about the complexity of
    > parallel programming (especially over the past 5-10 years), the plain
    > truth is that the incremental complexity of parallel programming over
    > that of sequential programming is not as large as is commonly believed.
    > Despite that you might have heard, the mind-numbing complexity of modern
    > computer systems is not due so much to there being multiple CPUs, but
    > rather to there being any CPUs at all.  In short, for the ultimate in
    > computer-system simplicity, the optimal choice is NR_CPUS=0.
    >
    > This commit therefore limits kernel builds to zero CPUs.  This change
    > has the beneficial side effect of rendering all kernel bugs harmless.
    > Furthermore, this commit enables additional beneficial changes, for
    > example, the removal of those parts of the kernel that are not needed
    > when there are zero CPUs.
    >
    > Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
    > Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
    > ---
    >
    >  alpha/Kconfig                     |   11 ++++++-----
    >  arm/Kconfig                       |    6 +++---
    >  blackfin/Kconfig                  |    3 ++-
    >  hexagon/Kconfig                   |    9 +++++----
    >  ia64/Kconfig                      |    9 +++++----
    >  m32r/Kconfig                      |   10 ++++++----
    >  mips/Kconfig                      |   21 +++++++++++----------
    >  mn10300/Kconfig                   |    3 ++-
    >  parisc/Kconfig                    |    6 +++---
    >  powerpc/platforms/Kconfig.cputype |    8 ++++----
    >  s390/Kconfig                      |   12 +++++++-----
    >  sh/Kconfig                        |   11 ++++++-----
    >  sparc/Kconfig                     |    8 ++++----
    >  tile/Kconfig                      |    9 +++++----
    >  x86/Kconfig                       |   16 +++++++++-------
    >  15 files changed, 78 insertions(+), 64 deletions(-)

    You forgot to fix half of the architectures, a.o. m68k?

    Gr{oetje,eeting}s,

                            Geert (still at GMT+2)

    --
    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
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