include/linux/sched.h  |    1 +
 include/linux/sysctl.h |    1 +
 kernel/sched.c         |    8 +++++++-
 kernel/sysctl.c        |    8 ++++++++
 4 files changed, 17 insertions(+), 1 deletion(-)

Index: linux-2.6.17-rc1/include/linux/sched.h
===================================================================
--- linux-2.6.17-rc1.orig/include/linux/sched.h	2006-04-04 16:49:08.000000000 +1000
+++ linux-2.6.17-rc1/include/linux/sched.h	2006-04-04 16:49:38.000000000 +1000
@@ -201,6 +201,7 @@ extern void show_stack(struct task_struc
 
 void io_schedule(void);
 long io_schedule_timeout(long timeout);
+extern int sched_interactive;
 
 extern void cpu_init (void);
 extern void trap_init(void);
Index: linux-2.6.17-rc1/include/linux/sysctl.h
===================================================================
--- linux-2.6.17-rc1.orig/include/linux/sysctl.h	2006-04-04 16:49:05.000000000 +1000
+++ linux-2.6.17-rc1/include/linux/sysctl.h	2006-04-04 16:49:38.000000000 +1000
@@ -148,6 +148,7 @@ enum
 	KERN_SPIN_RETRY=70,	/* int: number of spinlock retries */
 	KERN_ACPI_VIDEO_FLAGS=71, /* int: flags for setting up video after ACPI sleep */
 	KERN_IA64_UNALIGNED=72, /* int: ia64 unaligned userland trap enable */
+	KERN_INTERACTIVE=73,	/* interactive tasks can have cpu bursts */
 };
 
 
Index: linux-2.6.17-rc1/kernel/sysctl.c
===================================================================
--- linux-2.6.17-rc1.orig/kernel/sysctl.c	2006-04-04 16:49:05.000000000 +1000
+++ linux-2.6.17-rc1/kernel/sysctl.c	2006-04-04 16:49:38.000000000 +1000
@@ -623,6 +623,14 @@ static ctl_table kern_table[] = {
 		.mode		= 0444,
 		.proc_handler	= &proc_dointvec,
 	},
+	{
+		.ctl_name	= KERN_INTERACTIVE,
+		.procname	= "interactive",
+		.data		= &sched_interactive,
+		.maxlen		= sizeof (int),
+		.mode		= 0644,
+		.proc_handler	= &proc_dointvec,
+	},
 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86)
 	{
 		.ctl_name       = KERN_UNKNOWN_NMI_PANIC,
Index: linux-2.6.17-rc1/kernel/sched.c
===================================================================
--- linux-2.6.17-rc1.orig/kernel/sched.c	2006-04-04 16:49:33.000000000 +1000
+++ linux-2.6.17-rc1/kernel/sched.c	2006-04-04 16:49:38.000000000 +1000
@@ -58,6 +58,12 @@
 #include <asm/unistd.h>
 
 /*
+ * sched_interactive - sysctl which allows interactive tasks to have bonus
+ * raise its priority.
+ */
+int sched_interactive __read_mostly = 1;
+
+/*
  * Convert user-nice values [ -20 ... 0 ... 19 ]
  * to static priority [ MAX_RT_PRIO..MAX_PRIO-1 ],
  * and back.
@@ -653,7 +659,7 @@ static int effective_prio(const task_t *
 
 	best_bonus = bonus(p);
 	prio = MAX_RT_PRIO + best_bonus;
-	if (!batch_task(p))
+	if (sched_interactive && !batch_task(p))
 		prio -= p->bonus;
 
 	rr = rr_interval(p);