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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-04-20 10:27:15 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-05-27 12:59:04 -0700 |
| commit | 7fa270010e0ddd3693381431f373b3e3135b0695 (patch) | |
| tree | 896b3eaa0bbc48b80ca45b4e01711699e7e1199f /init | |
| parent | 7db21edfecb079b2257ced7a2cf2e32ae5e5d966 (diff) | |
| download | lwn-7fa270010e0ddd3693381431f373b3e3135b0695.tar.gz lwn-7fa270010e0ddd3693381431f373b3e3135b0695.zip | |
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')
| -rw-r--r-- | init/Kconfig | 14 |
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. -config RCU_FANOUT_EXACT - 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. - config RCU_FAST_NO_HZ bool "Accelerate last non-dyntick-idle CPU's grace periods" depends on NO_HZ_COMMON && SMP |