On Sat, Mar 31, 2012 at 06:40:30PM +0200, Geert Uytterhoeven wrote: > Hi Paul, > > On Sat, Mar 31, 2012 at 18:33, Paul E. McKenney > <paulmck@xxxxxxxxxxxxxxxxxx> 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@xxxxxxxxxxxxxxxxxx> > > Reviewed-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > > --- > > > > 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? I must confess that I fixed only the SMP-capable architectures. I of course would welcome additions for UP-only architectures. Thanx, Paul
