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-rw-r--r--init/Kconfig22
1 files changed, 21 insertions, 1 deletions
diff --git a/init/Kconfig b/init/Kconfig
index ada48441aff..c6d95f8ea05 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -396,6 +396,22 @@ config RCU_FANOUT_EXACT
Say N if unsure.
+config RCU_FAST_NO_HZ
+ bool "Accelerate last non-dyntick-idle CPU's grace periods"
+ depends on TREE_RCU && NO_HZ && SMP
+ default n
+ help
+ This option causes RCU to attempt to accelerate grace periods
+ in order to allow the final CPU to enter dynticks-idle state
+ more quickly. On the other hand, this option increases the
+ overhead of the dynticks-idle checking, particularly on systems
+ with large numbers of CPUs.
+
+ Say Y if energy efficiency is critically important, particularly
+ if you have relatively few CPUs.
+
+ Say N if you are unsure.
+
config TREE_RCU_TRACE
def_bool RCU_TRACE && ( TREE_RCU || TREE_PREEMPT_RCU )
select DEBUG_FS
@@ -1099,7 +1115,7 @@ config MMAP_ALLOW_UNINITIALIZED
See Documentation/nommu-mmap.txt for more information.
config PROFILING
- bool "Profiling support (EXPERIMENTAL)"
+ bool "Profiling support"
help
Say Y here to enable the extended profiling support mechanisms used
by profilers such as OProfile.
@@ -1249,4 +1265,8 @@ source "block/Kconfig"
config PREEMPT_NOTIFIERS
bool
+config PADATA
+ depends on SMP
+ bool
+
source "kernel/Kconfig.locks"