path: root/init
diff options
authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2015-04-20 10:27:15 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2015-05-27 12:59:04 -0700
commit7fa270010e0ddd3693381431f373b3e3135b0695 (patch)
tree896b3eaa0bbc48b80ca45b4e01711699e7e1199f /init
parentrcu: Directly drive RCU_USER_QS from Kconfig (diff)
rcu: Convert CONFIG_RCU_FANOUT_EXACT to boot parameter
The CONFIG_RCU_FANOUT_EXACT Kconfig parameter is used primarily (and perhaps only) by rcutorture to verify that RCU works correctly in specific rcu_node combining-tree configurations. It therefore does not make much sense have this as a question to people attempting to configure their kernels. So this commit creates an rcutree.rcu_fanout_exact= boot parameter that rcutorture can use, and eliminates the original CONFIG_RCU_FANOUT_EXACT Kconfig parameter. Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Pranith Kumar <bobby.prani@gmail.com>
Diffstat (limited to 'init')
1 files changed, 0 insertions, 14 deletions
diff --git a/init/Kconfig b/init/Kconfig
index 927210810189..0ec82362cfc0 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -611,20 +611,6 @@ config RCU_FANOUT_LEAF
Take the default if unsure.
- bool "Disable tree-based hierarchical RCU auto-balancing"
- depends on TREE_RCU || PREEMPT_RCU
- default n
- help
- This option forces use of the exact RCU_FANOUT value specified,
- regardless of imbalances in the hierarchy. This is useful for
- testing RCU itself, and might one day be useful on systems with
- strong NUMA behavior.
- Without RCU_FANOUT_EXACT, the code will balance the hierarchy.
- Say N if unsure.
bool "Accelerate last non-dyntick-idle CPU's grace periods"
depends on NO_HZ_COMMON && SMP