Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[safe/jmp/linux-2.6] / init / Kconfig

diff --git a/init/Kconfig b/init/Kconfig
index ada4844..c6d95f8 100644 (file)
--- 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"