On Tue, Apr 21, 2015 at 3:55 PM, Paul E. McKenney <paul...@linux.vnet.ibm.com> wrote: > From: "Paul E. McKenney" <paul...@linux.vnet.ibm.com> > > RCU_FANOUT_LEAF's range and default values depend on the value of > RCU_FANOUT, which at the time seemed like a cute way to save two lines > of Kconfig code. However, adding a dependency from both of these > Kconfig parameters on RCU_EXPERT requires that RCU_FANOUT_LEAF operate > correctly even if RCU_FANOUT is undefined. This commit therefore > allows RCU_FANOUT_LEAF to take on the full range of permitted values, > even in cases where RCU_FANOUT is undefined. > > Signed-off-by: Paul E. McKenney <paul...@linux.vnet.ibm.com> > --- > init/Kconfig | 6 ++++-- > 1 file changed, 4 insertions(+), 2 deletions(-) > > diff --git a/init/Kconfig b/init/Kconfig > index aa68d72fe051..35559e07db18 100644 > --- a/init/Kconfig > +++ b/init/Kconfig > @@ -599,9 +599,11 @@ config RCU_FANOUT > > config RCU_FANOUT_LEAF > int "Tree-based hierarchical RCU leaf-level fanout value" > - range 2 RCU_FANOUT if 64BIT > - range 2 RCU_FANOUT if !64BIT > + range 2 64 if 64BIT > + range 2 32 if !64BIT > depends on TREE_RCU || PREEMPT_RCU > + default 64 if 64BIT > + default 32 if !64BIT > default 16
What is the effect of this 'default 16' line? It is either 64 or 32 based on 64BIT, not sure when it is 16... > help > This option controls the leaf-level fanout of hierarchical > -- > 1.8.1.5 > -- Pranith -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
