Index: linux-2.6.21-cfs/init/Kconfig
===================================================================
--- linux-2.6.21-cfs.orig/init/Kconfig
+++ linux-2.6.21-cfs/init/Kconfig
@@ -1,3 +1,5 @@
+source "init/Kconfig.cfs"
+
 config DEFCONFIG_LIST
 	string
 	depends on !UML
Index: linux-2.6.21-cfs/init/Kconfig.cfs
===================================================================
--- linux-2.6.21-cfs.orig/init/Kconfig.cfs
+++ linux-2.6.21-cfs/init/Kconfig.cfs
@@ -0,0 +1,83 @@
+menu "Completely Fair Scheduler Tunables"
+
+choice
+	prompt "CFS predefined setups"
+	default CFS_INTERACTIVE_DESKTOP
+
+config CFS_FAIR_DESKTOP
+	bool "Fair Desktop/Server"
+	help
+	  Fair Desktop.
+	  Use this option if you want a stable and fair desktop.
+
+	  Privileged tasks won't be reniced and "preemption granularity" won't be
+	  modified.
+
+config CFS_INTERACTIVE_DESKTOP
+	bool "Interactive Desktop (Recommended)"
+	help
+	  Interactive Desktop.
+	  Use this option if you want a interactive desktop.
+
+	  Privileged tasks will be reniced to -10 value and "preemption granularity"
+	  will be decreased in 0.5 msec.
+
+config CFS_HIGHLY_INTERACTIVE_DESKTOP	
+	bool "Highly Interactive Desktop"
+	help
+	  Highly Interactive Desktop.
+	  Use this option if you want a very high interactive desktop.
+
+	  Privileged tasks will be reniced to -19 value and "preemption granularity"
+	  will be decreased in 1 msec.
+
+	  This option is not recommended, because it can be unstable.
+
+config CFS_CUSTOM_SETUP
+	bool "Custom Setup"
+	help
+	  Custom setup.
+	  Manual setup of "Completely Fair Scheduler" by user.
+
+endchoice
+
+config CFS_CUSTOM_NICE_VALUE
+	int "Custom nice value for privileged tasks"
+	depends CFS_CUSTOM_SETUP
+	range -20 20
+	default -5
+	help
+	  Privileged tasks will be reniced to value typed here.
+
+config CFS_CUSTOM_SCHED_GRANULARITY
+	int "Custom preemption granularity"
+	depends CFS_CUSTOM_SETUP
+	range 0 10000
+	default 3000
+	help
+	  Preemption granularity value (in milliseconds) will be set to value typed here.
+
+config CFS_SYSCTL_PRIVILEGED_NICE_LEVEL
+	bool "Change nice value for privileged tasks through sysctl"
+	default n
+	help
+	  If this option is enabled, a file called "sched_privileged_nice_level" will be created
+	  on /proc/sys/kernel that will allow to modify the nice value for privileged tasks.
+
+	  This *ONLY* will take effect on privileged tasks that are executed after the change.
+
+endmenu
+
+config CFS_PRIVILEGED_NICE_LEVEL
+	int
+	default 0 if CFS_FAIR_DESKTOP
+	default -10 if CFS_INTERACTIVE_DESKTOP
+	default -19 if CFS_HIGHLY_INTERACTIVE_DESKTOP
+	default CFS_CUSTOM_NICE_VALUE if CFS_CUSTOM_SETUP
+
+config CFS_SCHED_GRANULARITY
+	int
+	default 3000 if CFS_FAIR_DESKTOP
+	default 2500 if CFS_INTERACTIVE_DESKTOP
+	default 2000 if CFS_HIGHLY_INTERACTIVE_DESKTOP
+	default CFS_CUSTOM_SCHED_GRANULARITY if CFS_CUSTOM_SETUP
Index: linux-2.6.21-cfs/kernel/sched.c
===================================================================
--- linux-2.6.21-cfs.orig/kernel/sched.c
+++ linux-2.6.21-cfs/kernel/sched.c
@@ -3326,7 +3326,7 @@
  * Nice level for privileged tasks. (can be set to 0 for this
  * to be turned off)
  */
-int sysctl_sched_privileged_nice_level __read_mostly = 0;
+int sysctl_sched_privileged_nice_level __read_mostly = CONFIG_CFS_PRIVILEGED_NICE_LEVEL;
 
 static int __init privileged_nice_level_setup(char *str)
 {
Index: linux-2.6.21-cfs/kernel/sched_fair.c
===================================================================
--- linux-2.6.21-cfs.orig/kernel/sched_fair.c
+++ linux-2.6.21-cfs/kernel/sched_fair.c
@@ -16,7 +16,7 @@
  * number of CPUs. (i.e. factor 2x on 2-way systems, 3x on 4-way
  * systems, 4x on 8-way systems, 5x on 16-way systems, etc.)
  */
-unsigned int sysctl_sched_granularity __read_mostly = 3000000000ULL/HZ;
+unsigned int sysctl_sched_granularity __read_mostly = (CONFIG_CFS_SCHED_GRANULARITY * 1000000ULL)/HZ;


 /*
 * SCHED_BATCH wake-up granularity.
Index: linux-2.6.21-cfs/kernel/sysctl.c
===================================================================
--- linux-2.6.21-cfs.orig/kernel/sysctl.c
+++ linux-2.6.21-cfs/kernel/sysctl.c
@@ -123,5 +123,9 @@
 #ifdef CONFIG_RT_MUTEXES
 extern int max_lock_depth;
 #endif
+ 
+#ifdef CONFIG_CFS_SYSCTL_PRIVILEGED_NICE_LEVEL
+extern int sysctl_sched_privileged_nice_level;
+#endif
 
 #ifdef CONFIG_SYSCTL_SYSCALL
@@ -594,6 +598,17 @@
 		.mode		= 0444,
 		.proc_handler	= &proc_dointvec,
 	},
+#if defined(CONFIG_CFS_SYSCTL_PRIVILEGED_NICE_LEVEL)
+	{
+		.ctl_name	= CTL_UNNUMBERED,
+		.procname       = "sched_privileged_nice_level",
+		.data           = &sysctl_sched_privileged_nice_level,
+		.maxlen         = sizeof (int),
+		.mode           = 0644,
+		.proc_handler   = &proc_dointvec_minmax,
+		.strategy       = &sysctl_intvec,
+	},
+#endif
 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86)
 	{
 		.ctl_name       = KERN_UNKNOWN_NMI_PANIC,