Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched-devel

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched-devel: (62 commits)
  sched: build fix
  sched: better rt-group documentation
  sched: features fix
  sched: /debug/sched_features
  sched: add SCHED_FEAT_DEADLINE
  sched: debug: show a weight tree
  sched: fair: weight calculations
  sched: fair-group: de-couple load-balancing from the rb-trees
  sched: fair-group scheduling vs latency
  sched: rt-group: optimize dequeue_rt_stack
  sched: debug: add some debug code to handle the full hierarchy
  sched: fair-group: SMP-nice for group scheduling
  sched, cpuset: customize sched domains, core
  sched, cpuset: customize sched domains, docs
  sched: prepatory code movement
  sched: rt: multi level group constraints
  sched: task_group hierarchy
  sched: fix the task_group hierarchy for UID grouping
  sched: allow the group scheduler to have multiple levels
  sched: mix tasks and groups
  ...

20 files changed, 2357 insertions, 690 deletions

diff --git a/kernel/compat.c b/kernel/compat.c
index 9c48abf..e1ef048 100644
--- a/kernel/compat.c
+++ b/kernel/compat.c
@@ -445,7 +445,7 @@ asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
 	if (retval)
 		return retval;
 
-	return sched_setaffinity(pid, new_mask);
+	return sched_setaffinity(pid, &new_mask);
 }
 
 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, unsigned int len,
diff --git a/kernel/cpu.c b/kernel/cpu.c
index 2eff3f6..2011ad8d 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -232,9 +232,9 @@ static int _cpu_down(unsigned int cpu, int tasks_frozen)
 
 	/* Ensure that we are not runnable on dying cpu */
 	old_allowed = current->cpus_allowed;
-	tmp = CPU_MASK_ALL;
+	cpus_setall(tmp);
 	cpu_clear(cpu, tmp);
-	set_cpus_allowed(current, tmp);
+	set_cpus_allowed_ptr(current, &tmp);
 
 	p = __stop_machine_run(take_cpu_down, &tcd_param, cpu);
 
@@ -268,7 +268,7 @@ static int _cpu_down(unsigned int cpu, int tasks_frozen)
 out_thread:
 	err = kthread_stop(p);
 out_allowed:
-	set_cpus_allowed(current, old_allowed);
+	set_cpus_allowed_ptr(current, &old_allowed);
 out_release:
 	cpu_hotplug_done();
 	return err;
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index a1b61f4..8b35fbd 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -98,6 +98,9 @@ struct cpuset {
 	/* partition number for rebuild_sched_domains() */
 	int pn;
 
+	/* for custom sched domain */
+	int relax_domain_level;
+
 	/* used for walking a cpuset heirarchy */
 	struct list_head stack_list;
 };
@@ -478,6 +481,16 @@ static int cpusets_overlap(struct cpuset *a, struct cpuset *b)
 	return cpus_intersects(a->cpus_allowed, b->cpus_allowed);
 }
 
+static void
+update_domain_attr(struct sched_domain_attr *dattr, struct cpuset *c)
+{
+	if (!dattr)
+		return;
+	if (dattr->relax_domain_level < c->relax_domain_level)
+		dattr->relax_domain_level = c->relax_domain_level;
+	return;
+}
+
 /*
  * rebuild_sched_domains()
  *
@@ -553,12 +566,14 @@ static void rebuild_sched_domains(void)
 	int csn;		/* how many cpuset ptrs in csa so far */
 	int i, j, k;		/* indices for partition finding loops */
 	cpumask_t *doms;	/* resulting partition; i.e. sched domains */
+	struct sched_domain_attr *dattr;  /* attributes for custom domains */
 	int ndoms;		/* number of sched domains in result */
 	int nslot;		/* next empty doms[] cpumask_t slot */
 
 	q = NULL;
 	csa = NULL;
 	doms = NULL;
+	dattr = NULL;
 
 	/* Special case for the 99% of systems with one, full, sched domain */
 	if (is_sched_load_balance(&top_cpuset)) {
@@ -566,6 +581,11 @@ static void rebuild_sched_domains(void)
 		doms = kmalloc(sizeof(cpumask_t), GFP_KERNEL);
 		if (!doms)
 			goto rebuild;
+		dattr = kmalloc(sizeof(struct sched_domain_attr), GFP_KERNEL);
+		if (dattr) {
+			*dattr = SD_ATTR_INIT;
+			update_domain_attr(dattr, &top_cpuset);
+		}
 		*doms = top_cpuset.cpus_allowed;
 		goto rebuild;
 	}
@@ -622,6 +642,7 @@ restart:
 	doms = kmalloc(ndoms * sizeof(cpumask_t), GFP_KERNEL);
 	if (!doms)
 		goto rebuild;
+	dattr = kmalloc(ndoms * sizeof(struct sched_domain_attr), GFP_KERNEL);
 
 	for (nslot = 0, i = 0; i < csn; i++) {
 		struct cpuset *a = csa[i];
@@ -644,12 +665,15 @@ restart:
 			}
 
 			cpus_clear(*dp);
+			if (dattr)
+				*(dattr + nslot) = SD_ATTR_INIT;
 			for (j = i; j < csn; j++) {
 				struct cpuset *b = csa[j];
 
 				if (apn == b->pn) {
 					cpus_or(*dp, *dp, b->cpus_allowed);
 					b->pn = -1;
+					update_domain_attr(dattr, b);
 				}
 			}
 			nslot++;
@@ -660,7 +684,7 @@ restart:
 rebuild:
 	/* Have scheduler rebuild sched domains */
 	get_online_cpus();
-	partition_sched_domains(ndoms, doms);
+	partition_sched_domains(ndoms, doms, dattr);
 	put_online_cpus();
 
 done:
@@ -668,6 +692,7 @@ done:
 		kfifo_free(q);
 	kfree(csa);
 	/* Don't kfree(doms) -- partition_sched_domains() does that. */
+	/* Don't kfree(dattr) -- partition_sched_domains() does that. */
 }
 
 static inline int started_after_time(struct task_struct *t1,
@@ -729,7 +754,7 @@ int cpuset_test_cpumask(struct task_struct *tsk, struct cgroup_scanner *scan)
  */
 void cpuset_change_cpumask(struct task_struct *tsk, struct cgroup_scanner *scan)
 {
-	set_cpus_allowed(tsk, (cgroup_cs(scan->cg))->cpus_allowed);
+	set_cpus_allowed_ptr(tsk, &((cgroup_cs(scan->cg))->cpus_allowed));
 }
 
 /**
@@ -1011,6 +1036,21 @@ static int update_memory_pressure_enabled(struct cpuset *cs, char *buf)
 	return 0;
 }
 
+static int update_relax_domain_level(struct cpuset *cs, char *buf)
+{
+	int val = simple_strtol(buf, NULL, 10);
+
+	if (val < 0)
+		val = -1;
+
+	if (val != cs->relax_domain_level) {
+		cs->relax_domain_level = val;
+		rebuild_sched_domains();
+	}
+
+	return 0;
+}
+
 /*
  * update_flag - read a 0 or a 1 in a file and update associated flag
  * bit:	the bit to update (CS_CPU_EXCLUSIVE, CS_MEM_EXCLUSIVE,
@@ -1178,7 +1218,7 @@ static void cpuset_attach(struct cgroup_subsys *ss,
 
 	mutex_lock(&callback_mutex);
 	guarantee_online_cpus(cs, &cpus);
-	set_cpus_allowed(tsk, cpus);
+	set_cpus_allowed_ptr(tsk, &cpus);
 	mutex_unlock(&callback_mutex);
 
 	from = oldcs->mems_allowed;
@@ -1202,6 +1242,7 @@ typedef enum {
 	FILE_CPU_EXCLUSIVE,
 	FILE_MEM_EXCLUSIVE,
 	FILE_SCHED_LOAD_BALANCE,
+	FILE_SCHED_RELAX_DOMAIN_LEVEL,
 	FILE_MEMORY_PRESSURE_ENABLED,
 	FILE_MEMORY_PRESSURE,
 	FILE_SPREAD_PAGE,
@@ -1256,6 +1297,9 @@ static ssize_t cpuset_common_file_write(struct cgroup *cont,
 	case FILE_SCHED_LOAD_BALANCE:
 		retval = update_flag(CS_SCHED_LOAD_BALANCE, cs, buffer);
 		break;
+	case FILE_SCHED_RELAX_DOMAIN_LEVEL:
+		retval = update_relax_domain_level(cs, buffer);
+		break;
 	case FILE_MEMORY_MIGRATE:
 		retval = update_flag(CS_MEMORY_MIGRATE, cs, buffer);
 		break;
@@ -1354,6 +1398,9 @@ static ssize_t cpuset_common_file_read(struct cgroup *cont,
 	case FILE_SCHED_LOAD_BALANCE:
 		*s++ = is_sched_load_balance(cs) ? '1' : '0';
 		break;
+	case FILE_SCHED_RELAX_DOMAIN_LEVEL:
+		s += sprintf(s, "%d", cs->relax_domain_level);
+		break;
 	case FILE_MEMORY_MIGRATE:
 		*s++ = is_memory_migrate(cs) ? '1' : '0';
 		break;
@@ -1424,6 +1471,13 @@ static struct cftype cft_sched_load_balance = {
 	.private = FILE_SCHED_LOAD_BALANCE,
 };
 
+static struct cftype cft_sched_relax_domain_level = {
+	.name = "sched_relax_domain_level",
+	.read = cpuset_common_file_read,
+	.write = cpuset_common_file_write,
+	.private = FILE_SCHED_RELAX_DOMAIN_LEVEL,
+};
+
 static struct cftype cft_memory_migrate = {
 	.name = "memory_migrate",
 	.read = cpuset_common_file_read,
@@ -1475,6 +1529,9 @@ static int cpuset_populate(struct cgroup_subsys *ss, struct cgroup *cont)
 		return err;
 	if ((err = cgroup_add_file(cont, ss, &cft_sched_load_balance)) < 0)
 		return err;
+	if ((err = cgroup_add_file(cont, ss,
+					&cft_sched_relax_domain_level)) < 0)
+		return err;
 	if ((err = cgroup_add_file(cont, ss, &cft_memory_pressure)) < 0)
 		return err;
 	if ((err = cgroup_add_file(cont, ss, &cft_spread_page)) < 0)
@@ -1555,10 +1612,11 @@ static struct cgroup_subsys_state *cpuset_create(
 	if (is_spread_slab(parent))
 		set_bit(CS_SPREAD_SLAB, &cs->flags);
 	set_bit(CS_SCHED_LOAD_BALANCE, &cs->flags);
-	cs->cpus_allowed = CPU_MASK_NONE;
-	cs->mems_allowed = NODE_MASK_NONE;
+	cpus_clear(cs->cpus_allowed);
+	nodes_clear(cs->mems_allowed);
 	cs->mems_generation = cpuset_mems_generation++;
 	fmeter_init(&cs->fmeter);
+	cs->relax_domain_level = -1;
 
 	cs->parent = parent;
 	number_of_cpusets++;
@@ -1625,12 +1683,13 @@ int __init cpuset_init(void)
 {
 	int err = 0;
 
-	top_cpuset.cpus_allowed = CPU_MASK_ALL;
-	top_cpuset.mems_allowed = NODE_MASK_ALL;
+	cpus_setall(top_cpuset.cpus_allowed);
+	nodes_setall(top_cpuset.mems_allowed);
 
 	fmeter_init(&top_cpuset.fmeter);
 	top_cpuset.mems_generation = cpuset_mems_generation++;
 	set_bit(CS_SCHED_LOAD_BALANCE, &top_cpuset.flags);
+	top_cpuset.relax_domain_level = -1;
 
 	err = register_filesystem(&cpuset_fs_type);
 	if (err < 0)
@@ -1844,6 +1903,7 @@ void __init cpuset_init_smp(void)
 
  * cpuset_cpus_allowed - return cpus_allowed mask from a tasks cpuset.
  * @tsk: pointer to task_struct from which to obtain cpuset->cpus_allowed.
+ * @pmask: pointer to cpumask_t variable to receive cpus_allowed set.
  *
  * Description: Returns the cpumask_t cpus_allowed of the cpuset
  * attached to the specified @tsk.  Guaranteed to return some non-empty
@@ -1851,35 +1911,27 @@ void __init cpuset_init_smp(void)
  * tasks cpuset.
  **/
 
-cpumask_t cpuset_cpus_allowed(struct task_struct *tsk)
+void cpuset_cpus_allowed(struct task_struct *tsk, cpumask_t *pmask)
 {
-	cpumask_t mask;
-
 	mutex_lock(&callback_mutex);
-	mask = cpuset_cpus_allowed_locked(tsk);
+	cpuset_cpus_allowed_locked(tsk, pmask);
 	mutex_unlock(&callback_mutex);
-
-	return mask;
 }
 
 /**
  * cpuset_cpus_allowed_locked - return cpus_allowed mask from a tasks cpuset.
  * Must be called with callback_mutex held.
  **/
-cpumask_t cpuset_cpus_allowed_locked(struct task_struct *tsk)
+void cpuset_cpus_allowed_locked(struct task_struct *tsk, cpumask_t *pmask)
 {
-	cpumask_t mask;
-
 	task_lock(tsk);
-	guarantee_online_cpus(task_cs(tsk), &mask);
+	guarantee_online_cpus(task_cs(tsk), pmask);
 	task_unlock(tsk);
-
-	return mask;
 }
 
 void cpuset_init_current_mems_allowed(void)
 {
-	current->mems_allowed = NODE_MASK_ALL;
+	nodes_setall(current->mems_allowed);
 }
 
 /**
@@ -2261,8 +2313,16 @@ void cpuset_task_status_allowed(struct seq_file *m, struct task_struct *task)
 	m->count += cpumask_scnprintf(m->buf + m->count, m->size - m->count,
 					task->cpus_allowed);
 	seq_printf(m, "\n");
+	seq_printf(m, "Cpus_allowed_list:\t");
+	m->count += cpulist_scnprintf(m->buf + m->count, m->size - m->count,
+					task->cpus_allowed);
+	seq_printf(m, "\n");
 	seq_printf(m, "Mems_allowed:\t");
 	m->count += nodemask_scnprintf(m->buf + m->count, m->size - m->count,
 					task->mems_allowed);
 	seq_printf(m, "\n");
+	seq_printf(m, "Mems_allowed_list:\t");
+	m->count += nodelist_scnprintf(m->buf + m->count, m->size - m->count,
+					task->mems_allowed);
+	seq_printf(m, "\n");
 }
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index fdb3fbe..964964b 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -47,7 +47,7 @@ void dynamic_irq_init(unsigned int irq)
 	desc->irq_count = 0;
 	desc->irqs_unhandled = 0;
 #ifdef CONFIG_SMP
-	desc->affinity = CPU_MASK_ALL;
+	cpus_setall(desc->affinity);
 #endif
 	spin_unlock_irqrestore(&desc->lock, flags);
 }
diff --git a/kernel/kmod.c b/kernel/kmod.c
index 22be3ff..e276404 100644
--- a/kernel/kmod.c
+++ b/kernel/kmod.c
@@ -165,7 +165,7 @@ static int ____call_usermodehelper(void *data)
 	}
 
 	/* We can run anywhere, unlike our parent keventd(). */
-	set_cpus_allowed(current, CPU_MASK_ALL);
+	set_cpus_allowed_ptr(current, CPU_MASK_ALL_PTR);
 
 	/*
 	 * Our parent is keventd, which runs with elevated scheduling priority.
diff --git a/kernel/kthread.c b/kernel/kthread.c
index 0ac8878..25241d6 100644
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -180,6 +180,7 @@ void kthread_bind(struct task_struct *k, unsigned int cpu)
 	wait_task_inactive(k);
 	set_task_cpu(k, cpu);
 	k->cpus_allowed = cpumask_of_cpu(cpu);
+	k->rt.nr_cpus_allowed = 1;
 }
 EXPORT_SYMBOL(kthread_bind);
 
diff --git a/kernel/latencytop.c b/kernel/latencytop.c
index b4e3c85..7c74dab 100644
--- a/kernel/latencytop.c
+++ b/kernel/latencytop.c
@@ -64,8 +64,8 @@ account_global_scheduler_latency(struct task_struct *tsk, struct latency_record
 		return;
 
 	for (i = 0; i < MAXLR; i++) {
-		int q;
-		int same = 1;
+		int q, same = 1;
+
 		/* Nothing stored: */
 		if (!latency_record[i].backtrace[0]) {
 			if (firstnonnull > i)
@@ -73,12 +73,15 @@ account_global_scheduler_latency(struct task_struct *tsk, struct latency_record
 			continue;
 		}
 		for (q = 0 ; q < LT_BACKTRACEDEPTH ; q++) {
-			if (latency_record[i].backtrace[q] !=
-				lat->backtrace[q])
+			unsigned long record = lat->backtrace[q];
+
+			if (latency_record[i].backtrace[q] != record) {
 				same = 0;
-			if (same && lat->backtrace[q] == 0)
 				break;
-			if (same && lat->backtrace[q] == ULONG_MAX)
+			}
+
+			/* 0 and ULONG_MAX entries mean end of backtrace: */
+			if (record == 0 || record == ULONG_MAX)
 				break;
 		}
 		if (same) {
@@ -143,14 +146,18 @@ account_scheduler_latency(struct task_struct *tsk, int usecs, int inter)
 	for (i = 0; i < LT_SAVECOUNT ; i++) {
 		struct latency_record *mylat;
 		int same = 1;
+
 		mylat = &tsk->latency_record[i];
 		for (q = 0 ; q < LT_BACKTRACEDEPTH ; q++) {
-			if (mylat->backtrace[q] !=
-				lat.backtrace[q])
+			unsigned long record = lat.backtrace[q];
+
+			if (mylat->backtrace[q] != record) {
 				same = 0;
-			if (same && lat.backtrace[q] == 0)
 				break;
-			if (same && lat.backtrace[q] == ULONG_MAX)
+			}
+
+			/* 0 and ULONG_MAX entries mean end of backtrace: */
+			if (record == 0 || record == ULONG_MAX)
 				break;
 		}
 		if (same) {
diff --git a/kernel/rcupreempt.c b/kernel/rcupreempt.c
index e951701..e1cdf19 100644
--- a/kernel/rcupreempt.c
+++ b/kernel/rcupreempt.c
@@ -1007,10 +1007,10 @@ void __synchronize_sched(void)
 	if (sched_getaffinity(0, &oldmask) < 0)
 		oldmask = cpu_possible_map;
 	for_each_online_cpu(cpu) {
-		sched_setaffinity(0, cpumask_of_cpu(cpu));
+		sched_setaffinity(0, &cpumask_of_cpu(cpu));
 		schedule();
 	}
-	sched_setaffinity(0, oldmask);
+	sched_setaffinity(0, &oldmask);
 }
 EXPORT_SYMBOL_GPL(__synchronize_sched);
 
diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c
index fd59982..47894f9 100644
--- a/kernel/rcutorture.c
+++ b/kernel/rcutorture.c
@@ -723,9 +723,10 @@ static int rcu_idle_cpu;	/* Force all torture tasks off this CPU */
  */
 static void rcu_torture_shuffle_tasks(void)
 {
-	cpumask_t tmp_mask = CPU_MASK_ALL;
+	cpumask_t tmp_mask;
 	int i;
 
+	cpus_setall(tmp_mask);
 	get_online_cpus();
 
 	/* No point in shuffling if there is only one online CPU (ex: UP) */
@@ -737,25 +738,27 @@ static void rcu_torture_shuffle_tasks(void)
 	if (rcu_idle_cpu != -1)
 		cpu_clear(rcu_idle_cpu, tmp_mask);
 
-	set_cpus_allowed(current, tmp_mask);
+	set_cpus_allowed_ptr(current, &tmp_mask);
 
 	if (reader_tasks) {
 		for (i = 0; i < nrealreaders; i++)
 			if (reader_tasks[i])
-				set_cpus_allowed(reader_tasks[i], tmp_mask);
+				set_cpus_allowed_ptr(reader_tasks[i],
+						     &tmp_mask);
 	}
 
 	if (fakewriter_tasks) {
 		for (i = 0; i < nfakewriters; i++)
 			if (fakewriter_tasks[i])
-				set_cpus_allowed(fakewriter_tasks[i], tmp_mask);
+				set_cpus_allowed_ptr(fakewriter_tasks[i],
+						     &tmp_mask);
 	}
 
 	if (writer_task)
-		set_cpus_allowed(writer_task, tmp_mask);
+		set_cpus_allowed_ptr(writer_task, &tmp_mask);
 
 	if (stats_task)
-		set_cpus_allowed(stats_task, tmp_mask);
+		set_cpus_allowed_ptr(stats_task, &tmp_mask);
 
 	if (rcu_idle_cpu == -1)
 		rcu_idle_cpu = num_online_cpus() - 1;
diff --git a/kernel/sched.c b/kernel/sched.c
index 8dcdec6..57ba7ea 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -66,6 +66,10 @@
 #include <linux/unistd.h>
 #include <linux/pagemap.h>
 #include <linux/hrtimer.h>
+#include <linux/tick.h>
+#include <linux/bootmem.h>
+#include <linux/debugfs.h>
+#include <linux/ctype.h>
 
 #include <asm/tlb.h>
 #include <asm/irq_regs.h>
@@ -114,6 +118,11 @@ unsigned long long __attribute__((weak)) sched_clock(void)
  */
 #define DEF_TIMESLICE		(100 * HZ / 1000)
 
+/*
+ * single value that denotes runtime == period, ie unlimited time.
+ */
+#define RUNTIME_INF	((u64)~0ULL)
+
 #ifdef CONFIG_SMP
 /*
  * Divide a load by a sched group cpu_power : (load / sg->__cpu_power)
@@ -155,6 +164,84 @@ struct rt_prio_array {
 	struct list_head queue[MAX_RT_PRIO];
 };
 
+struct rt_bandwidth {
+	/* nests inside the rq lock: */
+	spinlock_t		rt_runtime_lock;
+	ktime_t			rt_period;
+	u64			rt_runtime;
+	struct hrtimer		rt_period_timer;
+};
+
+static struct rt_bandwidth def_rt_bandwidth;
+
+static int do_sched_rt_period_timer(struct rt_bandwidth *rt_b, int overrun);
+
+static enum hrtimer_restart sched_rt_period_timer(struct hrtimer *timer)
+{
+	struct rt_bandwidth *rt_b =
+		container_of(timer, struct rt_bandwidth, rt_period_timer);
+	ktime_t now;
+	int overrun;
+	int idle = 0;
+
+	for (;;) {
+		now = hrtimer_cb_get_time(timer);
+		overrun = hrtimer_forward(timer, now, rt_b->rt_period);
+
+		if (!overrun)
+			break;
+
+		idle = do_sched_rt_period_timer(rt_b, overrun);
+	}
+
+	return idle ? HRTIMER_NORESTART : HRTIMER_RESTART;
+}
+
+static
+void init_rt_bandwidth(struct rt_bandwidth *rt_b, u64 period, u64 runtime)
+{
+	rt_b->rt_period = ns_to_ktime(period);
+	rt_b->rt_runtime = runtime;
+
+	spin_lock_init(&rt_b->rt_runtime_lock);
+
+	hrtimer_init(&rt_b->rt_period_timer,
+			CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+	rt_b->rt_period_timer.function = sched_rt_period_timer;
+	rt_b->rt_period_timer.cb_mode = HRTIMER_CB_IRQSAFE_NO_SOFTIRQ;
+}
+
+static void start_rt_bandwidth(struct rt_bandwidth *rt_b)
+{
+	ktime_t now;
+
+	if (rt_b->rt_runtime == RUNTIME_INF)
+		return;
+
+	if (hrtimer_active(&rt_b->rt_period_timer))
+		return;
+
+	spin_lock(&rt_b->rt_runtime_lock);
+	for (;;) {
+		if (hrtimer_active(&rt_b->rt_period_timer))
+			break;
+
+		now = hrtimer_cb_get_time(&rt_b->rt_period_timer);
+		hrtimer_forward(&rt_b->rt_period_timer, now, rt_b->rt_period);
+		hrtimer_start(&rt_b->rt_period_timer,
+			      rt_b->rt_period_timer.expires,
+			      HRTIMER_MODE_ABS);
+	}
+	spin_unlock(&rt_b->rt_runtime_lock);
+}
+
+#ifdef CONFIG_RT_GROUP_SCHED
+static void destroy_rt_bandwidth(struct rt_bandwidth *rt_b)
+{
+	hrtimer_cancel(&rt_b->rt_period_timer);
+}
+#endif
+
 #ifdef CONFIG_GROUP_SCHED
 
 #include <linux/cgroup.h>
@@ -181,29 +268,39 @@ struct task_group {
 	struct sched_rt_entity **rt_se;
 	struct rt_rq **rt_rq;
 
-	u64 rt_runtime;
+	struct rt_bandwidth rt_bandwidth;
 #endif
 
 	struct rcu_head rcu;
 	struct list_head list;
+
+	struct task_group *parent;
+	struct list_head siblings;
+	struct list_head children;
 };
 
+#ifdef CONFIG_USER_SCHED
+
+/*
+ * Root task group.
+ * 	Every UID task group (including init_task_group aka UID-0) will
+ * 	be a child to this group.
+ */
+struct task_group root_task_group;
+
 #ifdef CONFIG_FAIR_GROUP_SCHED
 /* Default task group's sched entity on each cpu */
 static DEFINE_PER_CPU(struct sched_entity, init_sched_entity);
 /* Default task group's cfs_rq on each cpu */
 static DEFINE_PER_CPU(struct cfs_rq, init_cfs_rq) ____cacheline_aligned_in_smp;
-
-static struct sched_entity *init_sched_entity_p[NR_CPUS];
-static struct cfs_rq *init_cfs_rq_p[NR_CPUS];
 #endif
 
 #ifdef CONFIG_RT_GROUP_SCHED
 static DEFINE_PER_CPU(struct sched_rt_entity, init_sched_rt_entity);
 static DEFINE_PER_CPU(struct rt_rq, init_rt_rq) ____cacheline_aligned_in_smp;
-
-static struct sched_rt_entity *init_sched_rt_entity_p[NR_CPUS];
-static struct rt_rq *init_rt_rq_p[NR_CPUS];
+#endif
+#else
+#define root_task_group init_task_group
 #endif
 
 /* task_group_lock serializes add/remove of task groups and also changes to
@@ -221,23 +318,15 @@ static DEFINE_MUTEX(doms_cur_mutex);
 # define INIT_TASK_GROUP_LOAD	NICE_0_LOAD
 #endif
 
+#define MIN_SHARES	2
+
 static int init_task_group_load = INIT_TASK_GROUP_LOAD;
 #endif
 
 /* Default task group.
  *	Every task in system belong to this group at bootup.
  */
-struct task_group init_task_group = {
-#ifdef CONFIG_FAIR_GROUP_SCHED
-	.se	= init_sched_entity_p,
-	.cfs_rq = init_cfs_rq_p,
-#endif
-
-#ifdef CONFIG_RT_GROUP_SCHED
-	.rt_se	= init_sched_rt_entity_p,
-	.rt_rq	= init_rt_rq_p,
-#endif
-};
+struct task_group init_task_group;
 
 /* return group to which a task belongs */
 static inline struct task_group *task_group(struct task_struct *p)
@@ -297,8 +386,12 @@ struct cfs_rq {
 
 	struct rb_root tasks_timeline;
 	struct rb_node *rb_leftmost;
-	struct rb_node *rb_load_balance_curr;
-	/* 'curr' points to currently running entity on this cfs_rq.
+
+	struct list_head tasks;
+	struct list_head *balance_iterator;
+
+	/*
+	 * 'curr' points to currently running entity on this cfs_rq.
 	 * It is set to NULL otherwise (i.e when none are currently running).
 	 */
 	struct sched_entity *curr, *next;
@@ -318,6 +411,43 @@ struct cfs_rq {
 	 */
 	struct list_head leaf_cfs_rq_list;
 	struct task_group *tg;	/* group that "owns" this runqueue */
+
+#ifdef CONFIG_SMP
+	unsigned long task_weight;
+	unsigned long shares;
+	/*
+	 * We need space to build a sched_domain wide view of the full task
+	 * group tree, in order to avoid depending on dynamic memory allocation
+	 * during the load balancing we place this in the per cpu task group
+	 * hierarchy. This limits the load balancing to one instance per cpu,
+	 * but more should not be needed anyway.
+	 */
+	struct aggregate_struct {
+		/*
+		 *   load = weight(cpus) * f(tg)
+		 *
+		 * Where f(tg) is the recursive weight fraction assigned to
+		 * this group.
+		 */
+		unsigned long load;
+
+		/*
+		 * part of the group weight distributed to this span.
+		 */
+		unsigned long shares;
+
+		/*
+		 * The sum of all runqueue weights within this span.
+		 */
+		unsigned long rq_weight;
+
+		/*
+		 * Weight contributed by tasks; this is the part we can
+		 * influence by moving tasks around.
+		 */
+		unsigned long task_weight;
+	} aggregate;
+#endif
 #endif
 };
 
@@ -334,6 +464,9 @@ struct rt_rq {
 #endif
 	int rt_throttled;
 	u64 rt_time;
+	u64 rt_runtime;
+	/* Nests inside the rq lock: */
+	spinlock_t rt_runtime_lock;
 
 #ifdef CONFIG_RT_GROUP_SCHED
 	unsigned long rt_nr_boosted;
@@ -396,6 +529,7 @@ struct rq {
 	unsigned long cpu_load[CPU_LOAD_IDX_MAX];
 	unsigned char idle_at_tick;
 #ifdef CONFIG_NO_HZ
+	unsigned long last_tick_seen;
 	unsigned char in_nohz_recently;
 #endif
 	/* capture load from *all* tasks on this cpu: */
@@ -405,8 +539,6 @@ struct rq {
 
 	struct cfs_rq cfs;
 	struct rt_rq rt;
-	u64 rt_period_expire;
-	int rt_throttled;
 
 #ifdef CONFIG_FAIR_GROUP_SCHED
 	/* list of leaf cfs_rq on this cpu: */
@@ -499,6 +631,32 @@ static inline int cpu_of(struct rq *rq)
 #endif
 }
 
+#ifdef CONFIG_NO_HZ
+static inline bool nohz_on(int cpu)
+{
+	return tick_get_tick_sched(cpu)->nohz_mode != NOHZ_MODE_INACTIVE;
+}
+
+static inline u64 max_skipped_ticks(struct rq *rq)
+{
+	return nohz_on(cpu_of(rq)) ? jiffies - rq->last_tick_seen + 2 : 1;
+}
+
+static inline void update_last_tick_seen(struct rq *rq)
+{
+	rq->last_tick_seen = jiffies;
+}
+#else
+static inline u64 max_skipped_ticks(struct rq *rq)
+{
+	return 1;
+}
+
+static inline void update_last_tick_seen(struct rq *rq)
+{
+}
+#endif
+
 /*
  * Update the per-runqueue clock, as finegrained as the platform can give
  * us, but without assuming monotonicity, etc.:
@@ -523,9 +681,12 @@ static void __update_rq_clock(struct rq *rq)
 		/*
 		 * Catch too large forward jumps too:
 		 */
-		if (unlikely(clock + delta > rq->tick_timestamp + TICK_NSEC)) {
-			if (clock < rq->tick_timestamp + TICK_NSEC)
-				clock = rq->tick_timestamp + TICK_NSEC;
+		u64 max_jump = max_skipped_ticks(rq) * TICK_NSEC;
+		u64 max_time = rq->tick_timestamp + max_jump;
+
+		if (unlikely(clock + delta > max_time)) {
+			if (clock < max_time)
+				clock = max_time;
 			else
 				clock++;
 			rq->clock_overflows++;
@@ -561,23 +722,6 @@ static void update_rq_clock(struct rq *rq)
 #define task_rq(p)		cpu_rq(task_cpu(p))
 #define cpu_curr(cpu)		(cpu_rq(cpu)->curr)
 
-unsigned long rt_needs_cpu(int cpu)
-{
-	struct rq *rq = cpu_rq(cpu);
-	u64 delta;
-
-	if (!rq->rt_throttled)
-		return 0;
-
-	if (rq->clock > rq->rt_period_expire)
-		return 1;
-
-	delta = rq->rt_period_expire - rq->clock;
-	do_div(delta, NSEC_PER_SEC / HZ);
-
-	return (unsigned long)delta;
-}
-
 /*
  * Tunables that become constants when CONFIG_SCHED_DEBUG is off:
  */
@@ -590,22 +734,137 @@ unsigned long rt_needs_cpu(int cpu)
 /*
  * Debugging: various feature bits
  */
+
+#define SCHED_FEAT(name, enabled)	\
+	__SCHED_FEAT_##name ,
+
 enum {
-	SCHED_FEAT_NEW_FAIR_SLEEPERS	= 1,
-	SCHED_FEAT_WAKEUP_PREEMPT	= 2,
-	SCHED_FEAT_START_DEBIT		= 4,
-	SCHED_FEAT_HRTICK		= 8,
-	SCHED_FEAT_DOUBLE_TICK		= 16,
+#include "sched_features.h"
 };
 
+#undef SCHED_FEAT
+
+#define SCHED_FEAT(name, enabled)	\
+	(1UL << __SCHED_FEAT_##name) * enabled |
+
 const_debug unsigned int sysctl_sched_features =
-		SCHED_FEAT_NEW_FAIR_SLEEPERS	* 1 |
-		SCHED_FEAT_WAKEUP_PREEMPT	* 1 |
-		SCHED_FEAT_START_DEBIT		* 1 |
-		SCHED_FEAT_HRTICK		* 1 |
-		SCHED_FEAT_DOUBLE_TICK		* 0;
+#include "sched_features.h"
+	0;
+
+#undef SCHED_FEAT
+
+#ifdef CONFIG_SCHED_DEBUG
+#define SCHED_FEAT(name, enabled)	\
+	#name ,
+
+__read_mostly char *sched_feat_names[] = {
+#include "sched_features.h"
+	NULL
+};
+
+#undef SCHED_FEAT
+
+int sched_feat_open(struct inode *inode, struct file *filp)
+{
+	filp->private_data = inode->i_private;
+	return 0;
+}
+
+static ssize_t
+sched_feat_read(struct file *filp, char __user *ubuf,
+		size_t cnt, loff_t *ppos)
+{
+	char *buf;
+	int r = 0;
+	int len = 0;
+	int i;
 
-#define sched_feat(x) (sysctl_sched_features & SCHED_FEAT_##x)
+	for (i = 0; sched_feat_names[i]; i++) {
+		len += strlen(sched_feat_names[i]);
+		len += 4;
+	}
+
+	buf = kmalloc(len + 2, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	for (i = 0; sched_feat_names[i]; i++) {
+		if (sysctl_sched_features & (1UL << i))
+			r += sprintf(buf + r, "%s ", sched_feat_names[i]);
+		else
+			r += sprintf(buf + r, "NO_%s ", sched_feat_names[i]);
+	}
+
+	r += sprintf(buf + r, "\n");
+	WARN_ON(r >= len + 2);
+
+	r = simple_read_from_buffer(ubuf, cnt, ppos, buf, r);
+
+	kfree(buf);
+
+	return r;
+}
+
+static ssize_t
+sched_feat_write(struct file *filp, const char __user *ubuf,
+		size_t cnt, loff_t *ppos)
+{
+	char buf[64];
+	char *cmp = buf;
+	int neg = 0;
+	int i;
+
+	if (cnt > 63)
+		cnt = 63;
+
+	if (copy_from_user(&buf, ubuf, cnt))
+		return -EFAULT;
+
+	buf[cnt] = 0;
+
+	if (strncmp(buf, "NO_", 3) == 0) {
+		neg = 1;
+		cmp += 3;
+	}
+
+	for (i = 0; sched_feat_names[i]; i++) {
+		int len = strlen(sched_feat_names[i]);
+
+		if (strncmp(cmp, sched_feat_names[i], len) == 0) {
+			if (neg)
+				sysctl_sched_features &= ~(1UL << i);
+			else
+				sysctl_sched_features |= (1UL << i);
+			break;
+		}
+	}
+
+	if (!sched_feat_names[i])
+		return -EINVAL;
+
+	filp->f_pos += cnt;
+
+	return cnt;
+}
+
+static struct file_operations sched_feat_fops = {
+	.open	= sched_feat_open,
+	.read	= sched_feat_read,
+	.write	= sched_feat_write,
+};
+
+static __init int sched_init_debug(void)
+{
+	debugfs_create_file("sched_features", 0644, NULL, NULL,
+			&sched_feat_fops);
+
+	return 0;
+}
+late_initcall(sched_init_debug);
+
+#endif
+
+#define sched_feat(x) (sysctl_sched_features & (1UL << __SCHED_FEAT_##x))
 
 /*
  * Number of tasks to iterate in a single balance run.
@@ -627,16 +886,52 @@ static __read_mostly int scheduler_running;
  */
 int sysctl_sched_rt_runtime = 950000;
 
-/*
- * single value that denotes runtime == period, ie unlimited time.
- */
-#define RUNTIME_INF	((u64)~0ULL)
+static inline u64 global_rt_period(void)
+{
+	return (u64)sysctl_sched_rt_period * NSEC_PER_USEC;
+}
+
+static inline u64 global_rt_runtime(void)
+{
+	if (sysctl_sched_rt_period < 0)
+		return RUNTIME_INF;
+
+	return (u64)sysctl_sched_rt_runtime * NSEC_PER_USEC;
+}
+
+static const unsigned long long time_sync_thresh = 100000;
+
+static DEFINE_PER_CPU(unsigned long long, time_offset);
+static DEFINE_PER_CPU(unsigned long long, prev_cpu_time);
 
 /*
- * For kernel-internal use: high-speed (but slightly incorrect) per-cpu
- * clock constructed from sched_clock():
+ * Global lock which we take every now and then to synchronize
+ * the CPUs time. This method is not warp-safe, but it's good
+ * enough to synchronize slowly diverging time sources and thus
+ * it's good enough for tracing:
  */
-unsigned long long cpu_clock(int cpu)
+static DEFINE_SPINLOCK(time_sync_lock);
+static unsigned long long prev_global_time;
+
+static unsigned long long __sync_cpu_clock(cycles_t time, int cpu)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&time_sync_lock, flags);
+
+	if (time < prev_global_time) {
+		per_cpu(time_offset, cpu) += prev_global_time - time;
+		time = prev_global_time;
+	} else {
+		prev_global_time = time;
+	}
+
+	spin_unlock_irqrestore(&time_sync_lock, flags);
+
+	return time;
+}
+
+static unsigned long long __cpu_clock(int cpu)
 {
 	unsigned long long now;
 	unsigned long flags;
@@ -657,6 +952,24 @@ unsigned long long cpu_clock(int cpu)
 
 	return now;
 }
+
+/*
+ * For kernel-internal use: high-speed (but slightly incorrect) per-cpu
+ * clock constructed from sched_clock():
+ */
+unsigned long long cpu_clock(int cpu)
+{
+	unsigned long long prev_cpu_time, time, delta_time;
+
+	prev_cpu_time = per_cpu(prev_cpu_time, cpu);
+	time = __cpu_clock(cpu) + per_cpu(time_offset, cpu);
+	delta_time = time-prev_cpu_time;
+
+	if (unlikely(delta_time > time_sync_thresh))
+		time = __sync_cpu_clock(time, cpu);
+
+	return time;
+}
 EXPORT_SYMBOL_GPL(cpu_clock);
 
 #ifndef prepare_arch_switch
@@ -1116,6 +1429,9 @@ static void __resched_task(struct task_struct *p, int tif_bit)
  */
 #define SRR(x, y) (((x) + (1UL << ((y) - 1))) >> (y))
 
+/*
+ * delta *= weight / lw
+ */
 static unsigned long
 calc_delta_mine(unsigned long delta_exec, unsigned long weight,
 		struct load_weight *lw)
@@ -1138,12 +1454,6 @@ calc_delta_mine(unsigned long delta_exec, unsigned long weight,
 	return (unsigned long)min(tmp, (u64)(unsigned long)LONG_MAX);
 }
 
-static inline unsigned long
-calc_delta_fair(unsigned long delta_exec, struct load_weight *lw)
-{
-	return calc_delta_mine(delta_exec, NICE_0_LOAD, lw);
-}
-
 static inline void update_load_add(struct load_weight *lw, unsigned long inc)
 {
 	lw->weight += inc;
@@ -1241,11 +1551,390 @@ static void cpuacct_charge(struct task_struct *tsk, u64 cputime);
 static inline void cpuacct_charge(struct task_struct *tsk, u64 cputime) {}
 #endif
 
+static inline void inc_cpu_load(struct rq *rq, unsigned long load)
+{
+	update_load_add(&rq->load, load);
+}
+
+static inline void dec_cpu_load(struct rq *rq, unsigned long load)
+{
+	update_load_sub(&rq->load, load);
+}
+
 #ifdef CONFIG_SMP
 static unsigned long source_load(int cpu, int type);
 static unsigned long target_load(int cpu, int type);
 static unsigned long cpu_avg_load_per_task(int cpu);
 static int task_hot(struct task_struct *p, u64 now, struct sched_domain *sd);
+
+#ifdef CONFIG_FAIR_GROUP_SCHED
+
+/*
+ * Group load balancing.
+ *
+ * We calculate a few balance domain wide aggregate numbers; load and weight.
+ * Given the pictures below, and assuming each item has equal weight:
+ *
+ *         root          1 - thread
+ *         / | \         A - group
+ *        A  1  B
+ *       /|\   / \
+ *      C 2 D 3   4
+ *      |   |
+ *      5   6
+ *
+ * load:
+ *    A and B get 1/3-rd of the total load. C and D get 1/3-rd of A's 1/3-rd,
+ *    which equals 1/9-th of the total load.
+ *
+ * shares:
+ *    The weight of this group on the selected cpus.
+ *
+ * rq_weight:
+ *    Direct sum of all the cpu's their rq weight, e.g. A would get 3 while
+ *    B would get 2.
+ *
+ * task_weight:
+ *    Part of the rq_weight contributed by tasks; all groups except B would
+ *    get 1, B gets 2.
+ */
+
+static inline struct aggregate_struct *
+aggregate(struct task_group *tg, struct sched_domain *sd)
+{
+	return &tg->cfs_rq[sd->first_cpu]->aggregate;
+}
+
+typedef void (*aggregate_func)(struct task_group *, struct sched_domain *);
+
+/*
+ * Iterate the full tree, calling @down when first entering a node and @up when
+ * leaving it for the final time.
+ */
+static
+void aggregate_walk_tree(aggregate_func down, aggregate_func up,
+			 struct sched_domain *sd)
+{
+	struct task_group *parent, *child;
+
+	rcu_read_lock();
+	parent = &root_task_group;
+down:
+	(*down)(parent, sd);
+	list_for_each_entry_rcu(child, &parent->children, siblings) {
+		parent = child;
+		goto down;
+
+up:
+		continue;
+	}
+	(*up)(parent, sd);
+
+	child = parent;
+	parent = parent->parent;
+	if (parent)
+		goto up;
+	rcu_read_unlock();
+}
+
+/*
+ * Calculate the aggregate runqueue weight.
+ */
+static
+void aggregate_group_weight(struct task_group *tg, struct sched_domain *sd)
+{
+	unsigned long rq_weight = 0;
+	unsigned long task_weight = 0;
+	int i;
+
+	for_each_cpu_mask(i, sd->span) {
+		rq_weight += tg->cfs_rq[i]->load.weight;
+		task_weight += tg->cfs_rq[i]->task_weight;
+	}
+
+	aggregate(tg, sd)->rq_weight = rq_weight;
+	aggregate(tg, sd)->task_weight = task_weight;
+}
+
+/*
+ * Redistribute tg->shares amongst all tg->cfs_rq[]s.
+ */
+static void __aggregate_redistribute_shares(struct task_group *tg)
+{
+	int i, max_cpu = smp_processor_id();
+	unsigned long rq_weight = 0;
+	unsigned long shares, max_shares = 0, shares_rem = tg->shares;
+
+	for_each_possible_cpu(i)
+		rq_weight += tg->cfs_rq[i]->load.weight;
+
+	for_each_possible_cpu(i) {
+		/*
+		 * divide shares proportional to the rq_weights.
+		 */
+		shares = tg->shares * tg->cfs_rq[i]->load.weight;
+		shares /= rq_weight + 1;
+
+		tg->cfs_rq[i]->shares = shares;
+
+		if (shares > max_shares) {
+			max_shares = shares;
+			max_cpu = i;
+		}
+		shares_rem -= shares;
+	}
+
+	/*
+	 * Ensure it all adds up to tg->shares; we can loose a few
+	 * due to rounding down when computing the per-cpu shares.
+	 */
+	if (shares_rem)
+		tg->cfs_rq[max_cpu]->shares += shares_rem;
+}
+
+/*
+ * Compute the weight of this group on the given cpus.
+ */
+static
+void aggregate_group_shares(struct task_group *tg, struct sched_domain *sd)
+{
+	unsigned long shares = 0;
+	int i;
+
+again:
+	for_each_cpu_mask(i, sd->span)
+		shares += tg->cfs_rq[i]->shares;
+
+	/*
+	 * When the span doesn't have any shares assigned, but does have
+	 * tasks to run do a machine wide rebalance (should be rare).
+	 */
+	if (unlikely(!shares && aggregate(tg, sd)->rq_weight)) {
+		__aggregate_redistribute_shares(tg);
+		goto again;
+	}
+
+	aggregate(tg, sd)->shares = shares;
+}
+
+/*
+ * Compute the load fraction assigned to this group, relies on the aggregate
+ * weight and this group's parent's load, i.e. top-down.
+ */
+static
+void aggregate_group_load(struct task_group *tg, struct sched_domain *sd)
+{
+	unsigned long load;
+
+	if (!tg->parent) {
+		int i;
+
+		load = 0;
+		for_each_cpu_mask(i, sd->span)
+			load += cpu_rq(i)->load.weight;
+
+	} else {
+		load = aggregate(tg->parent, sd)->load;
+
+		/*
+		 * shares is our weight in the parent's rq so
+		 * shares/parent->rq_weight gives our fraction of the load
+		 */
+		load *= aggregate(tg, sd)->shares;
+		load /= aggregate(tg->parent, sd)->rq_weight + 1;
+	}
+
+	aggregate(tg, sd)->load = load;
+}
+
+static void __set_se_shares(struct sched_entity *se, unsigned long shares);
+
+/*
+ * Calculate and set the cpu's group shares.
+ */
+static void
+__update_group_shares_cpu(struct task_group *tg, struct sched_domain *sd,
+			  int tcpu)
+{
+	int boost = 0;
+	unsigned long shares;
+	unsigned long rq_weight;
+
+	if (!tg->se[tcpu])
+		return;
+
+	rq_weight = tg->cfs_rq[tcpu]->load.weight;
+
+	/*
+	 * If there are currently no tasks on the cpu pretend there is one of
+	 * average load so that when a new task gets to run here it will not
+	 * get delayed by group starvation.
+	 */
+	if (!rq_weight) {
+		boost = 1;
+		rq_weight = NICE_0_LOAD;
+	}
+
+	/*
+	 *           \Sum shares * rq_weight
+	 * shares =  -----------------------
+	 *               \Sum rq_weight
+	 *
+	 */
+	shares = aggregate(tg, sd)->shares * rq_weight;
+	shares /= aggregate(tg, sd)->rq_weight + 1;
+
+	/*
+	 * record the actual number of shares, not the boosted amount.
+	 */
+	tg->cfs_rq[tcpu]->shares = boost ? 0 : shares;
+
+	if (shares < MIN_SHARES)
+		shares = MIN_SHARES;
+
+	__set_se_shares(tg->se[tcpu], shares);
+}
+
+/*
+ * Re-adjust the weights on the cpu the task came from and on the cpu the
+ * task went to.
+ */
+static void
+__move_group_shares(struct task_group *tg, struct sched_domain *sd,
+		    int scpu, int dcpu)
+{
+	unsigned long shares;
+
+	shares = tg->cfs_rq[scpu]->shares + tg->cfs_rq[dcpu]->shares;
+
+	__update_group_shares_cpu(tg, sd, scpu);
+	__update_group_shares_cpu(tg, sd, dcpu);
+
+	/*
+	 * ensure we never loose shares due to rounding errors in the
+	 * above redistribution.
+	 */
+	shares -= tg->cfs_rq[scpu]->shares + tg->cfs_rq[dcpu]->shares;
+	if (shares)
+		tg->cfs_rq[dcpu]->shares += shares;
+}
+
+/*
+ * Because changing a group's shares changes the weight of the super-group
+ * we need to walk up the tree and change all shares until we hit the root.
+ */
+static void
+move_group_shares(struct task_group *tg, struct sched_domain *sd,
+		  int scpu, int dcpu)
+{
+	while (tg) {
+		__move_group_shares(tg, sd, scpu, dcpu);
+		tg = tg->parent;
+	}
+}
+
+static
+void aggregate_group_set_shares(struct task_group *tg, struct sched_domain *sd)
+{
+	unsigned long shares = aggregate(tg, sd)->shares;
+	int i;
+
+	for_each_cpu_mask(i, sd->span) {
+		struct rq *rq = cpu_rq(i);
+		unsigned long flags;
+
+		spin_lock_irqsave(&rq->lock, flags);
+		__update_group_shares_cpu(tg, sd, i);
+		spin_unlock_irqrestore(&rq->lock, flags);
+	}
+
+	aggregate_group_shares(tg, sd);
+
+	/*
+	 * ensure we never loose shares due to rounding errors in the
+	 * above redistribution.
+	 */
+	shares -= aggregate(tg, sd)->shares;
+	if (shares) {
+		tg->cfs_rq[sd->first_cpu]->shares += shares;
+		aggregate(tg, sd)->shares += shares;
+	}
+}
+
+/*
+ * Calculate the accumulative weight and recursive load of each task group
+ * while walking down the tree.
+ */
+static
+void aggregate_get_down(struct task_group *tg, struct sched_domain *sd)
+{
+	aggregate_group_weight(tg, sd);
+	aggregate_group_shares(tg, sd);
+	aggregate_group_load(tg, sd);
+}
+
+/*
+ * Rebalance the cpu shares while walking back up the tree.
+ */
+static
+void aggregate_get_up(struct task_group *tg, struct sched_domain *sd)
+{
+	aggregate_group_set_shares(tg, sd);
+}
+
+static DEFINE_PER_CPU(spinlock_t, aggregate_lock);
+
+static void __init init_aggregate(void)
+{
+	int i;
+
+	for_each_possible_cpu(i)
+		spin_lock_init(&per_cpu(aggregate_lock, i));
+}
+
+static int get_aggregate(struct sched_domain *sd)
+{
+	if (!spin_trylock(&per_cpu(aggregate_lock, sd->first_cpu)))
+		return 0;
+
+	aggregate_walk_tree(aggregate_get_down, aggregate_get_up, sd);
+	return 1;
+}
+
+static void put_aggregate(struct sched_domain *sd)
+{
+	spin_unlock(&per_cpu(aggregate_lock, sd->first_cpu));
+}
+
+static void cfs_rq_set_shares(struct cfs_rq *cfs_rq, unsigned long shares)
+{
+	cfs_rq->shares = shares;
+}
+
+#else
+
+static inline void init_aggregate(void)
+{
+}
+
+static inline int get_aggregate(struct sched_domain *sd)
+{
+	return 0;
+}
+
+static inline void put_aggregate(struct sched_domain *sd)
+{
+}
+#endif
+
+#else /* CONFIG_SMP */
+
+#ifdef CONFIG_FAIR_GROUP_SCHED
+static void cfs_rq_set_shares(struct cfs_rq *cfs_rq, unsigned long shares)
+{
+}
+#endif
+
 #endif /* CONFIG_SMP */
 
 #include "sched_stats.h"
@@ -1258,26 +1947,14 @@ static int task_hot(struct task_struct *p, u64 now, struct sched_domain *sd);
 
 #define sched_class_highest (&rt_sched_class)
 
-static inline void inc_load(struct rq *rq, const struct task_struct *p)
-{
-	update_load_add(&rq->load, p->se.load.weight);
-}
-
-static inline void dec_load(struct rq *rq, const struct task_struct *p)
-{
-	update_load_sub(&rq->load, p->se.load.weight);
-}
-
-static void inc_nr_running(struct task_struct *p, struct rq *rq)
+static void inc_nr_running(struct rq *rq)
 {
 	rq->nr_running++;
-	inc_load(rq, p);
 }
 
-static void dec_nr_running(struct task_struct *p, struct rq *rq)
+static void dec_nr_running(struct rq *rq)
 {
 	rq->nr_running--;
-	dec_load(rq, p);
 }
 
 static void set_load_weight(struct task_struct *p)
@@ -1369,7 +2046,7 @@ static void activate_task(struct rq *rq, struct task_struct *p, int wakeup)
 		rq->nr_uninterruptible--;
 
 	enqueue_task(rq, p, wakeup);
-	inc_nr_running(p, rq);
+	inc_nr_running(rq);
 }
 
 /*
@@ -1381,7 +2058,7 @@ static void deactivate_task(struct rq *rq, struct task_struct *p, int sleep)
 		rq->nr_uninterruptible++;
 
 	dequeue_task(rq, p, sleep);
-	dec_nr_running(p, rq);
+	dec_nr_running(rq);
 }
 
 /**
@@ -1438,7 +2115,7 @@ task_hot(struct task_struct *p, u64 now, struct sched_domain *sd)
 	/*
 	 * Buddy candidates are cache hot:
 	 */
-	if (&p->se == cfs_rq_of(&p->se)->next)
+	if (sched_feat(CACHE_HOT_BUDDY) && (&p->se == cfs_rq_of(&p->se)->next))
 		return 1;
 
 	if (p->sched_class != &fair_sched_class)
@@ -1728,17 +2405,17 @@ find_idlest_group(struct sched_domain *sd, struct task_struct *p, int this_cpu)
  * find_idlest_cpu - find the idlest cpu among the cpus in group.
  */
 static int
-find_idlest_cpu(struct sched_group *group, struct task_struct *p, int this_cpu)
+find_idlest_cpu(struct sched_group *group, struct task_struct *p, int this_cpu,
+		cpumask_t *tmp)
 {
-	cpumask_t tmp;
 	unsigned long load, min_load = ULONG_MAX;
 	int idlest = -1;
 	int i;
 
 	/* Traverse only the allowed CPUs */
-	cpus_and(tmp, group->cpumask, p->cpus_allowed);
+	cpus_and(*tmp, group->cpumask, p->cpus_allowed);
 
-	for_each_cpu_mask(i, tmp) {
+	for_each_cpu_mask(i, *tmp) {
 		load = weighted_cpuload(i);
 
 		if (load < min_load || (load == min_load && i == this_cpu)) {
@@ -1777,7 +2454,7 @@ static int sched_balance_self(int cpu, int flag)
 	}
 
 	while (sd) {
-		cpumask_t span;
+		cpumask_t span, tmpmask;
 		struct sched_group *group;
 		int new_cpu, weight;
 
@@ -1793,7 +2470,7 @@ static int sched_balance_self(int cpu, int flag)
 			continue;
 		}
 
-		new_cpu = find_idlest_cpu(group, t, cpu);
+		new_cpu = find_idlest_cpu(group, t, cpu, &tmpmask);
 		if (new_cpu == -1 || new_cpu == cpu) {
 			/* Now try balancing at a lower domain level of cpu */
 			sd = sd->child;
@@ -1839,6 +2516,9 @@ static int try_to_wake_up(struct task_struct *p, unsigned int state, int sync)
 	long old_state;
 	struct rq *rq;
 
+	if (!sched_feat(SYNC_WAKEUPS))
+		sync = 0;
+
 	smp_wmb();
 	rq = task_rq_lock(p, &flags);
 	old_state = p->state;
@@ -1955,6 +2635,7 @@ static void __sched_fork(struct task_struct *p)
 
 	INIT_LIST_HEAD(&p->rt.run_list);
 	p->se.on_rq = 0;
+	INIT_LIST_HEAD(&p->se.group_node);
 
 #ifdef CONFIG_PREEMPT_NOTIFIERS
 	INIT_HLIST_HEAD(&p->preempt_notifiers);
@@ -2030,7 +2711,7 @@ void wake_up_new_task(struct task_struct *p, unsigned long clone_flags)
 		 * management (if any):
 		 */
 		p->sched_class->task_new(rq, p);
-		inc_nr_running(p, rq);
+		inc_nr_running(rq);
 	}
 	check_preempt_curr(rq, p);
 #ifdef CONFIG_SMP
@@ -2674,7 +3355,7 @@ static int move_one_task(struct rq *this_rq, int this_cpu, struct rq *busiest,
 static struct sched_group *
 find_busiest_group(struct sched_domain *sd, int this_cpu,
 		   unsigned long *imbalance, enum cpu_idle_type idle,
-		   int *sd_idle, cpumask_t *cpus, int *balance)
+		   int *sd_idle, const cpumask_t *cpus, int *balance)
 {
 	struct sched_group *busiest = NULL, *this = NULL, *group = sd->groups;
 	unsigned long max_load, avg_load, total_load, this_load, total_pwr;
@@ -2975,7 +3656,7 @@ ret:
  */
 static struct rq *
 find_busiest_queue(struct sched_group *group, enum cpu_idle_type idle,
-		   unsigned long imbalance, cpumask_t *cpus)
+		   unsigned long imbalance, const cpumask_t *cpus)
 {
 	struct rq *busiest = NULL, *rq;
 	unsigned long max_load = 0;
@@ -3014,14 +3695,18 @@ find_busiest_queue(struct sched_group *group, enum cpu_idle_type idle,
  */
 static int load_balance(int this_cpu, struct rq *this_rq,
 			struct sched_domain *sd, enum cpu_idle_type idle,
-			int *balance)
+			int *balance, cpumask_t *cpus)
 {
 	int ld_moved, all_pinned = 0, active_balance = 0, sd_idle = 0;
 	struct sched_group *group;
 	unsigned long imbalance;
 	struct rq *busiest;
-	cpumask_t cpus = CPU_MASK_ALL;
 	unsigned long flags;
+	int unlock_aggregate;
+
+	cpus_setall(*cpus);
+
+	unlock_aggregate = get_aggregate(sd);
 
 	/*
 	 * When power savings policy is enabled for the parent domain, idle
@@ -3037,7 +3722,7 @@ static int load_balance(int this_cpu, struct rq *this_rq,
 
 redo:
 	group = find_busiest_group(sd, this_cpu, &imbalance, idle, &sd_idle,
-				   &cpus, balance);
+				   cpus, balance);
 
 	if (*balance == 0)
 		goto out_balanced;
@@ -3047,7 +3732,7 @@ redo:
 		goto out_balanced;
 	}
 
-	busiest = find_busiest_queue(group, idle, imbalance, &cpus);
+	busiest = find_busiest_queue(group, idle, imbalance, cpus);
 	if (!busiest) {
 		schedstat_inc(sd, lb_nobusyq[idle]);
 		goto out_balanced;
@@ -3080,8 +3765,8 @@ redo:
 
 		/* All tasks on this runqueue were pinned by CPU affinity */
 		if (unlikely(all_pinned)) {
-			cpu_clear(cpu_of(busiest), cpus);
-			if (!cpus_empty(cpus))
+			cpu_clear(cpu_of(busiest), *cpus);
+			if (!cpus_empty(*cpus))
 				goto redo;
 			goto out_balanced;
 		}
@@ -3138,8 +3823,9 @@ redo:
 
 	if (!ld_moved && !sd_idle && sd->flags & SD_SHARE_CPUPOWER &&
 	    !test_sd_parent(sd, SD_POWERSAVINGS_BALANCE))
-		return -1;
-	return ld_moved;
+		ld_moved = -1;
+
+	goto out;
 
 out_balanced:
 	schedstat_inc(sd, lb_balanced[idle]);
@@ -3154,8 +3840,13 @@ out_one_pinned:
 
 	if (!sd_idle && sd->flags & SD_SHARE_CPUPOWER &&
 	    !test_sd_parent(sd, SD_POWERSAVINGS_BALANCE))
-		return -1;
-	return 0;
+		ld_moved = -1;
+	else
+		ld_moved = 0;
+out:
+	if (unlock_aggregate)
+		put_aggregate(sd);
+	return ld_moved;
 }
 
 /*
@@ -3166,7 +3857,8 @@ out_one_pinned:
  * this_rq is locked.
  */
 static int
-load_balance_newidle(int this_cpu, struct rq *this_rq, struct sched_domain *sd)
+load_balance_newidle(int this_cpu, struct rq *this_rq, struct sched_domain *sd,
+			cpumask_t *cpus)
 {
 	struct sched_group *group;
 	struct rq *busiest = NULL;
@@ -3174,7 +3866,8 @@ load_balance_newidle(int this_cpu, struct rq *this_rq, struct sched_domain *sd)
 	int ld_moved = 0;
 	int sd_idle = 0;
 	int all_pinned = 0;
-	cpumask_t cpus = CPU_MASK_ALL;
+
+	cpus_setall(*cpus);
 
 	/*
 	 * When power savings policy is enabled for the parent domain, idle
@@ -3189,14 +3882,13 @@ load_balance_newidle(int this_cpu, struct rq *this_rq, struct sched_domain *sd)
 	schedstat_inc(sd, lb_count[CPU_NEWLY_IDLE]);
 redo:
 	group = find_busiest_group(sd, this_cpu, &imbalance, CPU_NEWLY_IDLE,
-				   &sd_idle, &cpus, NULL);
+				   &sd_idle, cpus, NULL);
 	if (!group) {
 		schedstat_inc(sd, lb_nobusyg[CPU_NEWLY_IDLE]);
 		goto out_balanced;
 	}
 
-	busiest = find_busiest_queue(group, CPU_NEWLY_IDLE, imbalance,
-				&cpus);
+	busiest = find_busiest_queue(group, CPU_NEWLY_IDLE, imbalance, cpus);
 	if (!busiest) {
 		schedstat_inc(sd, lb_nobusyq[CPU_NEWLY_IDLE]);
 		goto out_balanced;
@@ -3218,8 +3910,8 @@ redo:
 		spin_unlock(&busiest->lock);
 
 		if (unlikely(all_pinned)) {
-			cpu_clear(cpu_of(busiest), cpus);
-			if (!cpus_empty(cpus))
+			cpu_clear(cpu_of(busiest), *cpus);
+			if (!cpus_empty(*cpus))
 				goto redo;
 		}
 	}
@@ -3253,6 +3945,7 @@ static void idle_balance(int this_cpu, struct rq *this_rq)
 	struct sched_domain *sd;
 	int pulled_task = -1;
 	unsigned long next_balance = jiffies + HZ;
+	cpumask_t tmpmask;
 
 	for_each_domain(this_cpu, sd) {
 		unsigned long interval;
@@ -3262,8 +3955,8 @@ static void idle_balance(int this_cpu, struct rq *this_rq)
 
 		if (sd->flags & SD_BALANCE_NEWIDLE)
 			/* If we've pulled tasks over stop searching: */
-			pulled_task = load_balance_newidle(this_cpu,
-								this_rq, sd);
+			pulled_task = load_balance_newidle(this_cpu, this_rq,
+							   sd, &tmpmask);
 
 		interval = msecs_to_jiffies(sd->balance_interval);
 		if (time_after(next_balance, sd->last_balance + interval))
@@ -3422,6 +4115,7 @@ static void rebalance_domains(int cpu, enum cpu_idle_type idle)
 	/* Earliest time when we have to do rebalance again */
 	unsigned long next_balance = jiffies + 60*HZ;
 	int update_next_balance = 0;
+	cpumask_t tmp;
 
 	for_each_domain(cpu, sd) {
 		if (!(sd->flags & SD_LOAD_BALANCE))
@@ -3445,7 +4139,7 @@ static void rebalance_domains(int cpu, enum cpu_idle_type idle)
 		}
 
 		if (time_after_eq(jiffies, sd->last_balance + interval)) {
-			if (load_balance(cpu, rq, sd, idle, &balance)) {
+			if (load_balance(cpu, rq, sd, idle, &balance, &tmp)) {
 				/*
 				 * We've pulled tasks over so either we're no
 				 * longer idle, or one of our SMT siblings is
@@ -3561,7 +4255,7 @@ static inline void trigger_load_balance(struct rq *rq, int cpu)
 			 */
 			int ilb = first_cpu(nohz.cpu_mask);
 
-			if (ilb != NR_CPUS)
+			if (ilb < nr_cpu_ids)
 				resched_cpu(ilb);
 		}
 	}
@@ -3765,9 +4459,9 @@ void scheduler_tick(void)
 		rq->clock_underflows++;
 	}
 	rq->tick_timestamp = rq->clock;
+	update_last_tick_seen(rq);
 	update_cpu_load(rq);
 	curr->sched_class->task_tick(rq, curr, 0);
-	update_sched_rt_period(rq);
 	spin_unlock(&rq->lock);
 
 #ifdef CONFIG_SMP
@@ -4367,10 +5061,8 @@ void set_user_nice(struct task_struct *p, long nice)
 		goto out_unlock;
 	}
 	on_rq = p->se.on_rq;
-	if (on_rq) {
+	if (on_rq)
 		dequeue_task(rq, p, 0);
-		dec_load(rq, p);
-	}
 
 	p->static_prio = NICE_TO_PRIO(nice);
 	set_load_weight(p);
@@ -4380,7 +5072,6 @@ void set_user_nice(struct task_struct *p, long nice)
 
 	if (on_rq) {
 		enqueue_task(rq, p, 0);
-		inc_load(rq, p);
 		/*
 		 * If the task increased its priority or is running and
 		 * lowered its priority, then reschedule its CPU:
@@ -4602,7 +5293,7 @@ recheck:
 	 * Do not allow realtime tasks into groups that have no runtime
 	 * assigned.
 	 */
-	if (rt_policy(policy) && task_group(p)->rt_runtime == 0)
+	if (rt_policy(policy) && task_group(p)->rt_bandwidth.rt_runtime == 0)
 		return -EPERM;
 #endif
 
@@ -4764,9 +5455,10 @@ out_unlock:
 	return retval;
 }
 
-long sched_setaffinity(pid_t pid, cpumask_t new_mask)
+long sched_setaffinity(pid_t pid, const cpumask_t *in_mask)
 {
 	cpumask_t cpus_allowed;
+	cpumask_t new_mask = *in_mask;
 	struct task_struct *p;
 	int retval;
 
@@ -4797,13 +5489,13 @@ long sched_setaffinity(pid_t pid, cpumask_t new_mask)
 	if (retval)
 		goto out_unlock;
 
-	cpus_allowed = cpuset_cpus_allowed(p);
+	cpuset_cpus_allowed(p, &cpus_allowed);
 	cpus_and(new_mask, new_mask, cpus_allowed);
  again:
-	retval = set_cpus_allowed(p, new_mask);
+	retval = set_cpus_allowed_ptr(p, &new_mask);
 
 	if (!retval) {
-		cpus_allowed = cpuset_cpus_allowed(p);
+		cpuset_cpus_allowed(p, &cpus_allowed);
 		if (!cpus_subset(new_mask, cpus_allowed)) {
 			/*
 			 * We must have raced with a concurrent cpuset
@@ -4847,7 +5539,7 @@ asmlinkage long sys_sched_setaffinity(pid_t pid, unsigned int len,
 	if (retval)
 		return retval;
 
-	return sched_setaffinity(pid, new_mask);
+	return sched_setaffinity(pid, &new_mask);
 }
 
 /*
@@ -5309,7 +6001,6 @@ static inline void sched_init_granularity(void)
 		sysctl_sched_latency = limit;
 
 	sysctl_sched_wakeup_granularity *= factor;
-	sysctl_sched_batch_wakeup_granularity *= factor;
 }
 
 #ifdef CONFIG_SMP
@@ -5338,7 +6029,7 @@ static inline void sched_init_granularity(void)
  * task must not exit() & deallocate itself prematurely. The
  * call is not atomic; no spinlocks may be held.
  */
-int set_cpus_allowed(struct task_struct *p, cpumask_t new_mask)
+int set_cpus_allowed_ptr(struct task_struct *p, const cpumask_t *new_mask)
 {
 	struct migration_req req;
 	unsigned long flags;
@@ -5346,23 +6037,23 @@ int set_cpus_allowed(struct task_struct *p, cpumask_t new_mask)
 	int ret = 0;
 
 	rq = task_rq_lock(p, &flags);
-	if (!cpus_intersects(new_mask, cpu_online_map)) {
+	if (!cpus_intersects(*new_mask, cpu_online_map)) {
 		ret = -EINVAL;
 		goto out;
 	}
 
 	if (p->sched_class->set_cpus_allowed)
-		p->sched_class->set_cpus_allowed(p, &new_mask);
+		p->sched_class->set_cpus_allowed(p, new_mask);
 	else {
-		p->cpus_allowed = new_mask;
-		p->rt.nr_cpus_allowed = cpus_weight(new_mask);
+		p->cpus_allowed = *new_mask;
+		p->rt.nr_cpus_allowed = cpus_weight(*new_mask);
 	}
 
 	/* Can the task run on the task's current CPU? If so, we're done */
-	if (cpu_isset(task_cpu(p), new_mask))
+	if (cpu_isset(task_cpu(p), *new_mask))
 		goto out;
 
-	if (migrate_task(p, any_online_cpu(new_mask), &req)) {
+	if (migrate_task(p, any_online_cpu(*new_mask), &req)) {
 		/* Need help from migration thread: drop lock and wait. */
 		task_rq_unlock(rq, &flags);
 		wake_up_process(rq->migration_thread);
@@ -5375,7 +6066,7 @@ out:
 
 	return ret;
 }
-EXPORT_SYMBOL_GPL(set_cpus_allowed);
+EXPORT_SYMBOL_GPL(set_cpus_allowed_ptr);
 
 /*
  * Move (not current) task off this cpu, onto dest cpu. We're doing
@@ -5513,12 +6204,14 @@ static void move_task_off_dead_cpu(int dead_cpu, struct task_struct *p)
 		dest_cpu = any_online_cpu(mask);
 
 		/* On any allowed CPU? */
-		if (dest_cpu == NR_CPUS)
+		if (dest_cpu >= nr_cpu_ids)
 			dest_cpu = any_online_cpu(p->cpus_allowed);
 
 		/* No more Mr. Nice Guy. */
-		if (dest_cpu == NR_CPUS) {
-			cpumask_t cpus_allowed = cpuset_cpus_allowed_locked(p);
+		if (dest_cpu >= nr_cpu_ids) {
+			cpumask_t cpus_allowed;
+
+			cpuset_cpus_allowed_locked(p, &cpus_allowed);
 			/*
 			 * Try to stay on the same cpuset, where the
 			 * current cpuset may be a subset of all cpus.
@@ -5554,7 +6247,7 @@ static void move_task_off_dead_cpu(int dead_cpu, struct task_struct *p)
  */
 static void migrate_nr_uninterruptible(struct rq *rq_src)
 {
-	struct rq *rq_dest = cpu_rq(any_online_cpu(CPU_MASK_ALL));
+	struct rq *rq_dest = cpu_rq(any_online_cpu(*CPU_MASK_ALL_PTR));
 	unsigned long flags;
 
 	local_irq_save(flags);
@@ -5966,20 +6659,16 @@ void __init migration_init(void)
 
 #ifdef CONFIG_SMP
 
-/* Number of possible processor ids */
-int nr_cpu_ids __read_mostly = NR_CPUS;
-EXPORT_SYMBOL(nr_cpu_ids);
-
 #ifdef CONFIG_SCHED_DEBUG
 
-static int sched_domain_debug_one(struct sched_domain *sd, int cpu, int level)
+static int sched_domain_debug_one(struct sched_domain *sd, int cpu, int level,
+				  cpumask_t *groupmask)
 {
 	struct sched_group *group = sd->groups;
-	cpumask_t groupmask;
-	char str[NR_CPUS];
+	char str[256];
 
-	cpumask_scnprintf(str, NR_CPUS, sd->span);
-	cpus_clear(groupmask);
+	cpulist_scnprintf(str, sizeof(str), sd->span);
+	cpus_clear(*groupmask);
 
 	printk(KERN_DEBUG "%*s domain %d: ", level, "", level);
 
@@ -6023,25 +6712,25 @@ static int sched_domain_debug_one(struct sched_domain *sd, int cpu, int level)
 			break;
 		}
 
-		if (cpus_intersects(groupmask, group->cpumask)) {
+		if (cpus_intersects(*groupmask, group->cpumask)) {
 			printk(KERN_CONT "\n");
 			printk(KERN_ERR "ERROR: repeated CPUs\n");
 			break;
 		}
 
-		cpus_or(groupmask, groupmask, group->cpumask);
+		cpus_or(*groupmask, *groupmask, group->cpumask);
 
-		cpumask_scnprintf(str, NR_CPUS, group->cpumask);
+		cpulist_scnprintf(str, sizeof(str), group->cpumask);
 		printk(KERN_CONT " %s", str);
 
 		group = group->next;
 	} while (group != sd->groups);
 	printk(KERN_CONT "\n");
 
-	if (!cpus_equal(sd->span, groupmask))
+	if (!cpus_equal(sd->span, *groupmask))
 		printk(KERN_ERR "ERROR: groups don't span domain->span\n");
 
-	if (sd->parent && !cpus_subset(groupmask, sd->parent->span))
+	if (sd->parent && !cpus_subset(*groupmask, sd->parent->span))
 		printk(KERN_ERR "ERROR: parent span is not a superset "
 			"of domain->span\n");
 	return 0;
@@ -6049,6 +6738,7 @@ static int sched_domain_debug_one(struct sched_domain *sd, int cpu, int level)
 
 static void sched_domain_debug(struct sched_domain *sd, int cpu)
 {
+	cpumask_t *groupmask;
 	int level = 0;
 
 	if (!sd) {
@@ -6058,14 +6748,21 @@ static void sched_domain_debug(struct sched_domain *sd, int cpu)
 
 	printk(KERN_DEBUG "CPU%d attaching sched-domain:\n", cpu);
 
+	groupmask = kmalloc(sizeof(cpumask_t), GFP_KERNEL);
+	if (!groupmask) {
+		printk(KERN_DEBUG "Cannot load-balance (out of memory)\n");
+		return;
+	}
+
 	for (;;) {
-		if (sched_domain_debug_one(sd, cpu, level))
+		if (sched_domain_debug_one(sd, cpu, level, groupmask))
 			break;
 		level++;
 		sd = sd->parent;
 		if (!sd)
 			break;
 	}
+	kfree(groupmask);
 }
 #else
 # define sched_domain_debug(sd, cpu) do { } while (0)
@@ -6253,30 +6950,33 @@ __setup("isolcpus=", isolated_cpu_setup);
  * and ->cpu_power to 0.
  */
 static void
-init_sched_build_groups(cpumask_t span, const cpumask_t *cpu_map,
+init_sched_build_groups(const cpumask_t *span, const cpumask_t *cpu_map,
 			int (*group_fn)(int cpu, const cpumask_t *cpu_map,
-					struct sched_group **sg))
+					struct sched_group **sg,
+					cpumask_t *tmpmask),
+			cpumask_t *covered, cpumask_t *tmpmask)
 {
 	struct sched_group *first = NULL, *last = NULL;
-	cpumask_t covered = CPU_MASK_NONE;
 	int i;
 
-	for_each_cpu_mask(i, span) {
+	cpus_clear(*covered);
+
+	for_each_cpu_mask(i, *span) {
 		struct sched_group *sg;
-		int group = group_fn(i, cpu_map, &sg);
+		int group = group_fn(i, cpu_map, &sg, tmpmask);
 		int j;
 
-		if (cpu_isset(i, covered))
+		if (cpu_isset(i, *covered))
 			continue;
 
-		sg->cpumask = CPU_MASK_NONE;
+		cpus_clear(sg->cpumask);
 		sg->__cpu_power = 0;
 
-		for_each_cpu_mask(j, span) {
-			if (group_fn(j, cpu_map, NULL) != group)
+		for_each_cpu_mask(j, *span) {
+			if (group_fn(j, cpu_map, NULL, tmpmask) != group)
 				continue;
 
-			cpu_set(j, covered);
+			cpu_set(j, *covered);
 			cpu_set(j, sg->cpumask);
 		}
 		if (!first)
@@ -6302,7 +7002,7 @@ init_sched_build_groups(cpumask_t span, const cpumask_t *cpu_map,
  *
  * Should use nodemask_t.
  */
-static int find_next_best_node(int node, unsigned long *used_nodes)
+static int find_next_best_node(int node, nodemask_t *used_nodes)
 {
 	int i, n, val, min_val, best_node = 0;
 
@@ -6316,7 +7016,7 @@ static int find_next_best_node(int node, unsigned long *used_nodes)
 			continue;
 
 		/* Skip already used nodes */
-		if (test_bit(n, used_nodes))
+		if (node_isset(n, *used_nodes))
 			continue;
 
 		/* Simple min distance search */
@@ -6328,40 +7028,36 @@ static int find_next_best_node(int node, unsigned long *used_nodes)
 		}
 	}
 
-	set_bit(best_node, used_nodes);
+	node_set(best_node, *used_nodes);
 	return best_node;
 }
 
 /**
  * sched_domain_node_span - get a cpumask for a node's sched_domain
  * @node: node whose cpumask we're constructing
- * @size: number of nodes to include in this span
  *
  * Given a node, construct a good cpumask for its sched_domain to span. It
  * should be one that prevents unnecessary balancing, but also spreads tasks
  * out optimally.
  */
-static cpumask_t sched_domain_node_span(int node)
+static void sched_domain_node_span(int node, cpumask_t *span)
 {
-	DECLARE_BITMAP(used_nodes, MAX_NUMNODES);
-	cpumask_t span, nodemask;
+	nodemask_t used_nodes;
+	node_to_cpumask_ptr(nodemask, node);
 	int i;
 
-	cpus_clear(span);
-	bitmap_zero(used_nodes, MAX_NUMNODES);
+	cpus_clear(*span);
+	nodes_clear(used_nodes);
 
-	nodemask = node_to_cpumask(node);
-	cpus_or(span, span, nodemask);
-	set_bit(node, used_nodes);
+	cpus_or(*span, *span, *nodemask);
+	node_set(node, used_nodes);
 
 	for (i = 1; i < SD_NODES_PER_DOMAIN; i++) {
-		int next_node = find_next_best_node(node, used_nodes);
+		int next_node = find_next_best_node(node, &used_nodes);
 
-		nodemask = node_to_cpumask(next_node);
-		cpus_or(span, span, nodemask);
+		node_to_cpumask_ptr_next(nodemask, next_node);
+		cpus_or(*span, *span, *nodemask);
 	}
-
-	return span;
 }
 #endif
 
@@ -6375,7 +7071,8 @@ static DEFINE_PER_CPU(struct sched_domain, cpu_domains);
 static DEFINE_PER_CPU(struct sched_group, sched_group_cpus);
 
 static int
-cpu_to_cpu_group(int cpu, const cpumask_t *cpu_map, struct sched_group **sg)
+cpu_to_cpu_group(int cpu, const cpumask_t *cpu_map, struct sched_group **sg,
+		 cpumask_t *unused)
 {
 	if (sg)
 		*sg = &per_cpu(sched_group_cpus, cpu);
@@ -6393,19 +7090,22 @@ static DEFINE_PER_CPU(struct sched_group, sched_group_core);
 
 #if defined(CONFIG_SCHED_MC) && defined(CONFIG_SCHED_SMT)
 static int
-cpu_to_core_group(int cpu, const cpumask_t *cpu_map, struct sched_group **sg)
+cpu_to_core_group(int cpu, const cpumask_t *cpu_map, struct sched_group **sg,
+		  cpumask_t *mask)
 {
 	int group;
-	cpumask_t mask = per_cpu(cpu_sibling_map, cpu);
-	cpus_and(mask, mask, *cpu_map);
-	group = first_cpu(mask);
+
+	*mask = per_cpu(cpu_sibling_map, cpu);
+	cpus_and(*mask, *mask, *cpu_map);
+	group = first_cpu(*mask);
 	if (sg)
 		*sg = &per_cpu(sched_group_core, group);
 	return group;
 }
 #elif defined(CONFIG_SCHED_MC)
 static int
-cpu_to_core_group(int cpu, const cpumask_t *cpu_map, struct sched_group **sg)
+cpu_to_core_group(int cpu, const cpumask_t *cpu_map, struct sched_group **sg,
+		  cpumask_t *unused)
 {
 	if (sg)
 		*sg = &per_cpu(sched_group_core, cpu);
@@ -6417,17 +7117,18 @@ static DEFINE_PER_CPU(struct sched_domain, phys_domains);
 static DEFINE_PER_CPU(struct sched_group, sched_group_phys);
 
 static int
-cpu_to_phys_group(int cpu, const cpumask_t *cpu_map, struct sched_group **sg)
+cpu_to_phys_group(int cpu, const cpumask_t *cpu_map, struct sched_group **sg,
+		  cpumask_t *mask)
 {
 	int group;
 #ifdef CONFIG_SCHED_MC
-	cpumask_t mask = cpu_coregroup_map(cpu);
-	cpus_and(mask, mask, *cpu_map);
-	group = first_cpu(mask);
+	*mask = cpu_coregroup_map(cpu);
+	cpus_and(*mask, *mask, *cpu_map);
+	group = first_cpu(*mask);
 #elif defined(CONFIG_SCHED_SMT)
-	cpumask_t mask = per_cpu(cpu_sibling_map, cpu);
-	cpus_and(mask, mask, *cpu_map);
-	group = first_cpu(mask);
+	*mask = per_cpu(cpu_sibling_map, cpu);
+	cpus_and(*mask, *mask, *cpu_map);
+	group = first_cpu(*mask);
 #else
 	group = cpu;
 #endif
@@ -6443,19 +7144,19 @@ cpu_to_phys_group(int cpu, const cpumask_t *cpu_map, struct sched_group **sg)
  * gets dynamically allocated.
  */
 static DEFINE_PER_CPU(struct sched_domain, node_domains);
-static struct sched_group **sched_group_nodes_bycpu[NR_CPUS];
+static struct sched_group ***sched_group_nodes_bycpu;
 
 static DEFINE_PER_CPU(struct sched_domain, allnodes_domains);
 static DEFINE_PER_CPU(struct sched_group, sched_group_allnodes);
 
 static int cpu_to_allnodes_group(int cpu, const cpumask_t *cpu_map,
-				 struct sched_group **sg)
+				 struct sched_group **sg, cpumask_t *nodemask)
 {
-	cpumask_t nodemask = node_to_cpumask(cpu_to_node(cpu));
 	int group;
 
-	cpus_and(nodemask, nodemask, *cpu_map);
-	group = first_cpu(nodemask);
+	*nodemask = node_to_cpumask(cpu_to_node(cpu));
+	cpus_and(*nodemask, *nodemask, *cpu_map);
+	group = first_cpu(*nodemask);
 
 	if (sg)
 		*sg = &per_cpu(sched_group_allnodes, group);
@@ -6491,7 +7192,7 @@ static void init_numa_sched_groups_power(struct sched_group *group_head)
 
 #ifdef CONFIG_NUMA
 /* Free memory allocated for various sched_group structures */
-static void free_sched_groups(const cpumask_t *cpu_map)
+static void free_sched_groups(const cpumask_t *cpu_map, cpumask_t *nodemask)
 {
 	int cpu, i;
 
@@ -6503,11 +7204,11 @@ static void free_sched_groups(const cpumask_t *cpu_map)
 			continue;
 
 		for (i = 0; i < MAX_NUMNODES; i++) {
-			cpumask_t nodemask = node_to_cpumask(i);
 			struct sched_group *oldsg, *sg = sched_group_nodes[i];
 
-			cpus_and(nodemask, nodemask, *cpu_map);
-			if (cpus_empty(nodemask))
+			*nodemask = node_to_cpumask(i);
+			cpus_and(*nodemask, *nodemask, *cpu_map);
+			if (cpus_empty(*nodemask))
 				continue;
 
 			if (sg == NULL)
@@ -6525,7 +7226,7 @@ next_sg:
 	}
 }
 #else
-static void free_sched_groups(const cpumask_t *cpu_map)
+static void free_sched_groups(const cpumask_t *cpu_map, cpumask_t *nodemask)
 {
 }
 #endif
@@ -6583,13 +7284,106 @@ static void init_sched_groups_power(int cpu, struct sched_domain *sd)
 }
 
 /*
+ * Initializers for schedule domains
+ * Non-inlined to reduce accumulated stack pressure in build_sched_domains()
+ */
+
+#define	SD_INIT(sd, type)	sd_init_##type(sd)
+#define SD_INIT_FUNC(type)	\
+static noinline void sd_init_##type(struct sched_domain *sd)	\
+{								\
+	memset(sd, 0, sizeof(*sd));				\
+	*sd = SD_##type##_INIT;					\
+	sd->level = SD_LV_##type;				\
+}
+
+SD_INIT_FUNC(CPU)
+#ifdef CONFIG_NUMA
+ SD_INIT_FUNC(ALLNODES)
+ SD_INIT_FUNC(NODE)
+#endif
+#ifdef CONFIG_SCHED_SMT
+ SD_INIT_FUNC(SIBLING)
+#endif
+#ifdef CONFIG_SCHED_MC
+ SD_INIT_FUNC(MC)
+#endif
+
+/*
+ * To minimize stack usage kmalloc room for cpumasks and share the
+ * space as the usage in build_sched_domains() dictates.  Used only
+ * if the amount of space is significant.
+ */
+struct allmasks {
+	cpumask_t tmpmask;			/* make this one first */
+	union {
+		cpumask_t nodemask;
+		cpumask_t this_sibling_map;
+		cpumask_t this_core_map;
+	};
+	cpumask_t send_covered;
+
+#ifdef CONFIG_NUMA
+	cpumask_t domainspan;
+	cpumask_t covered;
+	cpumask_t notcovered;
+#endif
+};
+
+#if	NR_CPUS > 128
+#define	SCHED_CPUMASK_ALLOC		1
+#define	SCHED_CPUMASK_FREE(v)		kfree(v)
+#define	SCHED_CPUMASK_DECLARE(v)	struct allmasks *v
+#else
+#define	SCHED_CPUMASK_ALLOC		0
+#define	SCHED_CPUMASK_FREE(v)
+#define	SCHED_CPUMASK_DECLARE(v)	struct allmasks _v, *v = &_v
+#endif
+
+#define	SCHED_CPUMASK_VAR(v, a) 	cpumask_t *v = (cpumask_t *) \
+			((unsigned long)(a) + offsetof(struct allmasks, v))
+
+static int default_relax_domain_level = -1;
+
+static int __init setup_relax_domain_level(char *str)
+{
+	default_relax_domain_level = simple_strtoul(str, NULL, 0);
+	return 1;
+}
+__setup("relax_domain_level=", setup_relax_domain_level);
+
+static void set_domain_attribute(struct sched_domain *sd,
+				 struct sched_domain_attr *attr)
+{
+	int request;
+
+	if (!attr || attr->relax_domain_level < 0) {
+		if (default_relax_domain_level < 0)
+			return;
+		else
+			request = default_relax_domain_level;
+	} else
+		request = attr->relax_domain_level;
+	if (request < sd->level) {
+		/* turn off idle balance on this domain */
+		sd->flags &= ~(SD_WAKE_IDLE|SD_BALANCE_NEWIDLE);
+	} else {
+		/* turn on idle balance on this domain */
+		sd->flags |= (SD_WAKE_IDLE_FAR|SD_BALANCE_NEWIDLE);
+	}
+}
+
+/*
  * Build sched domains for a given set of cpus and attach the sched domains
  * to the individual cpus
  */
-static int build_sched_domains(const cpumask_t *cpu_map)
+static int __build_sched_domains(const cpumask_t *cpu_map,
+				 struct sched_domain_attr *attr)
 {
 	int i;
 	struct root_domain *rd;
+	SCHED_CPUMASK_DECLARE(allmasks);
+	cpumask_t *tmpmask;
 #ifdef CONFIG_NUMA
 	struct sched_group **sched_group_nodes = NULL;
 	int sd_allnodes = 0;
@@ -6603,39 +7397,65 @@ static int build_sched_domains(const cpumask_t *cpu_map)
 		printk(KERN_WARNING "Can not alloc sched group node list\n");
 		return -ENOMEM;
 	}
-	sched_group_nodes_bycpu[first_cpu(*cpu_map)] = sched_group_nodes;
 #endif
 
 	rd = alloc_rootdomain();
 	if (!rd) {
 		printk(KERN_WARNING "Cannot alloc root domain\n");
+#ifdef CONFIG_NUMA
+		kfree(sched_group_nodes);
+#endif
 		return -ENOMEM;
 	}
 
+#if SCHED_CPUMASK_ALLOC
+	/* get space for all scratch cpumask variables */
+	allmasks = kmalloc(sizeof(*allmasks), GFP_KERNEL);
+	if (!allmasks) {
+		printk(KERN_WARNING "Cannot alloc cpumask array\n");
+		kfree(rd);
+#ifdef CONFIG_NUMA
+		kfree(sched_group_nodes);
+#endif
+		return -ENOMEM;
+	}
+#endif
+	tmpmask = (cpumask_t *)allmasks;
+
+
+#ifdef CONFIG_NUMA
+	sched_group_nodes_bycpu[first_cpu(*cpu_map)] = sched_group_nodes;
+#endif
+
 	/*
 	 * Set up domains for cpus specified by the cpu_map.
 	 */
 	for_each_cpu_mask(i, *cpu_map) {
 		struct sched_domain *sd = NULL, *p;
-		cpumask_t nodemask = node_to_cpumask(cpu_to_node(i));
+		SCHED_CPUMASK_VAR(nodemask, allmasks);
 
-		cpus_and(nodemask, nodemask, *cpu_map);
+		*nodemask = node_to_cpumask(cpu_to_node(i));
+		cpus_and(*nodemask, *nodemask, *cpu_map);
 
 #ifdef CONFIG_NUMA
 		if (cpus_weight(*cpu_map) >
-				SD_NODES_PER_DOMAIN*cpus_weight(nodemask)) {
+				SD_NODES_PER_DOMAIN*cpus_weight(*nodemask)) {
 			sd = &per_cpu(allnodes_domains, i);
-			*sd = SD_ALLNODES_INIT;
+			SD_INIT(sd, ALLNODES);
+			set_domain_attribute(sd, attr);
 			sd->span = *cpu_map;
-			cpu_to_allnodes_group(i, cpu_map, &sd->groups);
+			sd->first_cpu = first_cpu(sd->span);
+			cpu_to_allnodes_group(i, cpu_map, &sd->groups, tmpmask);
 			p = sd;
 			sd_allnodes = 1;
 		} else
 			p = NULL;
 
 		sd = &per_cpu(node_domains, i);
-		*sd = SD_NODE_INIT;
-		sd->span = sched_domain_node_span(cpu_to_node(i));
+		SD_INIT(sd, NODE);
+		set_domain_attribute(sd, attr);
+		sched_domain_node_span(cpu_to_node(i), &sd->span);
+		sd->first_cpu = first_cpu(sd->span);
 		sd->parent = p;
 		if (p)
 			p->child = sd;
@@ -6644,94 +7464,120 @@ static int build_sched_domains(const cpumask_t *cpu_map)
 
 		p = sd;
 		sd = &per_cpu(phys_domains, i);
-		*sd = SD_CPU_INIT;
-		sd->span = nodemask;
+		SD_INIT(sd, CPU);
+		set_domain_attribute(sd, attr);
+		sd->span = *nodemask;
+		sd->first_cpu = first_cpu(sd->span);
 		sd->parent = p;
 		if (p)
 			p->child = sd;
-		cpu_to_phys_group(i, cpu_map, &sd->groups);
+		cpu_to_phys_group(i, cpu_map, &sd->groups, tmpmask);
 
 #ifdef CONFIG_SCHED_MC
 		p = sd;
 		sd = &per_cpu(core_domains, i);
-		*sd = SD_MC_INIT;
+		SD_INIT(sd, MC);
+		set_domain_attribute(sd, attr);
 		sd->span = cpu_coregroup_map(i);
+		sd->first_cpu = first_cpu(sd->span);
 		cpus_and(sd->span, sd->span, *cpu_map);
 		sd->parent = p;
 		p->child = sd;
-		cpu_to_core_group(i, cpu_map, &sd->groups);
+		cpu_to_core_group(i, cpu_map, &sd->groups, tmpmask);
 #endif
 
 #ifdef CONFIG_SCHED_SMT
 		p = sd;
 		sd = &per_cpu(cpu_domains, i);
-		*sd = SD_SIBLING_INIT;
+		SD_INIT(sd, SIBLING);
+		set_domain_attribute(sd, attr);
 		sd->span = per_cpu(cpu_sibling_map, i);
+		sd->first_cpu = first_cpu(sd->span);
 		cpus_and(sd->span, sd->span, *cpu_map);
 		sd->parent = p;
 		p->child = sd;
-		cpu_to_cpu_group(i, cpu_map, &sd->groups);
+		cpu_to_cpu_group(i, cpu_map, &sd->groups, tmpmask);
 #endif
 	}
 
 #ifdef CONFIG_SCHED_SMT
 	/* Set up CPU (sibling) groups */
 	for_each_cpu_mask(i, *cpu_map) {
-		cpumask_t this_sibling_map = per_cpu(cpu_sibling_map, i);
-		cpus_and(this_sibling_map, this_sibling_map, *cpu_map);
-		if (i != first_cpu(this_sibling_map))
+		SCHED_CPUMASK_VAR(this_sibling_map, allmasks);
+		SCHED_CPUMASK_VAR(send_covered, allmasks);
+
+		*this_sibling_map = per_cpu(cpu_sibling_map, i);
+		cpus_and(*this_sibling_map, *this_sibling_map, *cpu_map);
+		if (i != first_cpu(*this_sibling_map))
 			continue;
 
 		init_sched_build_groups(this_sibling_map, cpu_map,
-					&cpu_to_cpu_group);
+					&cpu_to_cpu_group,
+					send_covered, tmpmask);
 	}
 #endif
 
 #ifdef CONFIG_SCHED_MC
 	/* Set up multi-core groups */
 	for_each_cpu_mask(i, *cpu_map) {
-		cpumask_t this_core_map = cpu_coregroup_map(i);
-		cpus_and(this_core_map, this_core_map, *cpu_map);
-		if (i != first_cpu(this_core_map))
+		SCHED_CPUMASK_VAR(this_core_map, allmasks);
+		SCHED_CPUMASK_VAR(send_covered, allmasks);
+
+		*this_core_map = cpu_coregroup_map(i);
+		cpus_and(*this_core_map, *this_core_map, *cpu_map);
+		if (i != first_cpu(*this_core_map))
 			continue;
+
 		init_sched_build_groups(this_core_map, cpu_map,
-					&cpu_to_core_group);
+					&cpu_to_core_group,
+					send_covered, tmpmask);
 	}
 #endif
 
 	/* Set up physical groups */
 	for (i = 0; i < MAX_NUMNODES; i++) {
-		cpumask_t nodemask = node_to_cpumask(i);
+		SCHED_CPUMASK_VAR(nodemask, allmasks);
+		SCHED_CPUMASK_VAR(send_covered, allmasks);
 
-		cpus_and(nodemask, nodemask, *cpu_map);
-		if (cpus_empty(nodemask))
+		*nodemask = node_to_cpumask(i);
+		cpus_and(*nodemask, *nodemask, *cpu_map);
+		if (cpus_empty(*nodemask))
 			continue;
 
-		init_sched_build_groups(nodemask, cpu_map, &cpu_to_phys_group);
+		init_sched_build_groups(nodemask, cpu_map,
+					&cpu_to_phys_group,
+					send_covered, tmpmask);
 	}
 
 #ifdef CONFIG_NUMA
 	/* Set up node groups */
-	if (sd_allnodes)
-		init_sched_build_groups(*cpu_map, cpu_map,
-					&cpu_to_allnodes_group);
+	if (sd_allnodes) {
+		SCHED_CPUMASK_VAR(send_covered, allmasks);
+
+		init_sched_build_groups(cpu_map, cpu_map,
+					&cpu_to_allnodes_group,
+					send_covered, tmpmask);
+	}
 
 	for (i = 0; i < MAX_NUMNODES; i++) {
 		/* Set up node groups */
 		struct sched_group *sg, *prev;
-		cpumask_t nodemask = node_to_cpumask(i);
-		cpumask_t domainspan;
-		cpumask_t covered = CPU_MASK_NONE;
+		SCHED_CPUMASK_VAR(nodemask, allmasks);
+		SCHED_CPUMASK_VAR(domainspan, allmasks);
+		SCHED_CPUMASK_VAR(covered, allmasks);
 		int j;
 
-		cpus_and(nodemask, nodemask, *cpu_map);
-		if (cpus_empty(nodemask)) {
+		*nodemask = node_to_cpumask(i);
+		cpus_clear(*covered);
+
+		cpus_and(*nodemask, *nodemask, *cpu_map);
+		if (cpus_empty(*nodemask)) {
 			sched_group_nodes[i] = NULL;
 			continue;
 		}
 
-		domainspan = sched_domain_node_span(i);
-		cpus_and(domainspan, domainspan, *cpu_map);
+		sched_domain_node_span(i, domainspan);
+		cpus_and(*domainspan, *domainspan, *cpu_map);
 
 		sg = kmalloc_node(sizeof(struct sched_group), GFP_KERNEL, i);
 		if (!sg) {
@@ -6740,31 +7586,31 @@ static int build_sched_domains(const cpumask_t *cpu_map)
 			goto error;
 		}
 		sched_group_nodes[i] = sg;
-		for_each_cpu_mask(j, nodemask) {
+		for_each_cpu_mask(j, *nodemask) {
 			struct sched_domain *sd;
 
 			sd = &per_cpu(node_domains, j);
 			sd->groups = sg;
 		}
 		sg->__cpu_power = 0;
-		sg->cpumask = nodemask;
+		sg->cpumask = *nodemask;
 		sg->next = sg;
-		cpus_or(covered, covered, nodemask);
+		cpus_or(*covered, *covered, *nodemask);
 		prev = sg;
 
 		for (j = 0; j < MAX_NUMNODES; j++) {
-			cpumask_t tmp, notcovered;
+			SCHED_CPUMASK_VAR(notcovered, allmasks);
 			int n = (i + j) % MAX_NUMNODES;
+			node_to_cpumask_ptr(pnodemask, n);
 
-			cpus_complement(notcovered, covered);
-			cpus_and(tmp, notcovered, *cpu_map);
-			cpus_and(tmp, tmp, domainspan);
-			if (cpus_empty(tmp))
+			cpus_complement(*notcovered, *covered);
+			cpus_and(*tmpmask, *notcovered, *cpu_map);
+			cpus_and(*tmpmask, *tmpmask, *domainspan);
+			if (cpus_empty(*tmpmask))
 				break;
 
-			nodemask = node_to_cpumask(n);
-			cpus_and(tmp, tmp, nodemask);
-			if (cpus_empty(tmp))
+			cpus_and(*tmpmask, *tmpmask, *pnodemask);
+			if (cpus_empty(*tmpmask))
 				continue;
 
 			sg = kmalloc_node(sizeof(struct sched_group),
@@ -6775,9 +7621,9 @@ static int build_sched_domains(const cpumask_t *cpu_map)
 				goto error;
 			}
 			sg->__cpu_power = 0;
-			sg->cpumask = tmp;
+			sg->cpumask = *tmpmask;
 			sg->next = prev->next;
-			cpus_or(covered, covered, tmp);
+			cpus_or(*covered, *covered, *tmpmask);
 			prev->next = sg;
 			prev = sg;
 		}
@@ -6813,7 +7659,8 @@ static int build_sched_domains(const cpumask_t *cpu_map)
 	if (sd_allnodes) {
 		struct sched_group *sg;
 
-		cpu_to_allnodes_group(first_cpu(*cpu_map), cpu_map, &sg);
+		cpu_to_allnodes_group(first_cpu(*cpu_map), cpu_map, &sg,
+								tmpmask);
 		init_numa_sched_groups_power(sg);
 	}
 #endif
@@ -6831,17 +7678,26 @@ static int build_sched_domains(const cpumask_t *cpu_map)
 		cpu_attach_domain(sd, rd, i);
 	}
 
+	SCHED_CPUMASK_FREE((void *)allmasks);
 	return 0;
 
 #ifdef CONFIG_NUMA
 error:
-	free_sched_groups(cpu_map);
+	free_sched_groups(cpu_map, tmpmask);
+	SCHED_CPUMASK_FREE((void *)allmasks);
 	return -ENOMEM;
 #endif
 }
 
+static int build_sched_domains(const cpumask_t *cpu_map)
+{
+	return __build_sched_domains(cpu_map, NULL);
+}
+
 static cpumask_t *doms_cur;	/* current sched domains */
 static int ndoms_cur;		/* number of sched domains in 'doms_cur' */
+static struct sched_domain_attr *dattr_cur;	/* attribues of custom domains
+						   in 'doms_cur' */
 
 /*
  * Special case: If a kmalloc of a doms_cur partition (array of
@@ -6869,15 +7725,17 @@ static int arch_init_sched_domains(const cpumask_t *cpu_map)
 	if (!doms_cur)
 		doms_cur = &fallback_doms;
 	cpus_andnot(*doms_cur, *cpu_map, cpu_isolated_map);
+	dattr_cur = NULL;
 	err = build_sched_domains(doms_cur);
 	register_sched_domain_sysctl();
 
 	return err;
 }
 
-static void arch_destroy_sched_domains(const cpumask_t *cpu_map)
+static void arch_destroy_sched_domains(const cpumask_t *cpu_map,
+				       cpumask_t *tmpmask)
 {
-	free_sched_groups(cpu_map);
+	free_sched_groups(cpu_map, tmpmask);
 }
 
 /*
@@ -6886,6 +7744,7 @@ static void arch_destroy_sched_domains(const cpumask_t *cpu_map)
  */
 static void detach_destroy_domains(const cpumask_t *cpu_map)
 {
+	cpumask_t tmpmask;
 	int i;
 
 	unregister_sched_domain_sysctl();
@@ -6893,7 +7752,23 @@ static void detach_destroy_domains(const cpumask_t *cpu_map)
 	for_each_cpu_mask(i, *cpu_map)
 		cpu_attach_domain(NULL, &def_root_domain, i);
 	synchronize_sched();
-	arch_destroy_sched_domains(cpu_map);
+	arch_destroy_sched_domains(cpu_map, &tmpmask);
+}
+
+/* handle null as "default" */
+static int dattrs_equal(struct sched_domain_attr *cur, int idx_cur,
+			struct sched_domain_attr *new, int idx_new)
+{
+	struct sched_domain_attr tmp;
+
+	/* fast path */
+	if (!new && !cur)
+		return 1;
+
+	tmp = SD_ATTR_INIT;
+	return !memcmp(cur ? (cur + idx_cur) : &tmp,
+			new ? (new + idx_new) : &tmp,
+			sizeof(struct sched_domain_attr));
 }
 
 /*
@@ -6917,7 +7792,8 @@ static void detach_destroy_domains(const cpumask_t *cpu_map)
  *
  * Call with hotplug lock held
  */
-void partition_sched_domains(int ndoms_new, cpumask_t *doms_new)
+void partition_sched_domains(int ndoms_new, cpumask_t *doms_new,
+			     struct sched_domain_attr *dattr_new)
 {
 	int i, j;
 
@@ -6930,12 +7806,14 @@ void partition_sched_domains(int ndoms_new, cpumask_t *doms_new)
 		ndoms_new = 1;
 		doms_new = &fallback_doms;
 		cpus_andnot(doms_new[0], cpu_online_map, cpu_isolated_map);
+		dattr_new = NULL;
 	}
 
 	/* Destroy deleted domains */
 	for (i = 0; i < ndoms_cur; i++) {
 		for (j = 0; j < ndoms_new; j++) {
-			if (cpus_equal(doms_cur[i], doms_new[j]))
+			if (cpus_equal(doms_cur[i], doms_new[j])
+			    && dattrs_equal(dattr_cur, i, dattr_new, j))
 				goto match1;
 		}
 		/* no match - a current sched domain not in new doms_new[] */
@@ -6947,11 +7825,13 @@ match1:
 	/* Build new domains */
 	for (i = 0; i < ndoms_new; i++) {
 		for (j = 0; j < ndoms_cur; j++) {
-			if (cpus_equal(doms_new[i], doms_cur[j]))
+			if (cpus_equal(doms_new[i], doms_cur[j])
+			    && dattrs_equal(dattr_new, i, dattr_cur, j))
 				goto match2;
 		}
 		/* no match - add a new doms_new */
-		build_sched_domains(doms_new + i);
+		__build_sched_domains(doms_new + i,
+					dattr_new ? dattr_new + i : NULL);
 match2:
 		;
 	}
@@ -6959,7 +7839,9 @@ match2:
 	/* Remember the new sched domains */
 	if (doms_cur != &fallback_doms)
 		kfree(doms_cur);
+	kfree(dattr_cur);	/* kfree(NULL) is safe */
 	doms_cur = doms_new;
+	dattr_cur = dattr_new;
 	ndoms_cur = ndoms_new;
 
 	register_sched_domain_sysctl();
@@ -7086,6 +7968,11 @@ void __init sched_init_smp(void)
 {
 	cpumask_t non_isolated_cpus;
 
+#if defined(CONFIG_NUMA)
+	sched_group_nodes_bycpu = kzalloc(nr_cpu_ids * sizeof(void **),
+								GFP_KERNEL);
+	BUG_ON(sched_group_nodes_bycpu == NULL);
+#endif
 	get_online_cpus();
 	arch_init_sched_domains(&cpu_online_map);
 	cpus_andnot(non_isolated_cpus, cpu_possible_map, cpu_isolated_map);
@@ -7096,13 +7983,18 @@ void __init sched_init_smp(void)
 	hotcpu_notifier(update_sched_domains, 0);
 
 	/* Move init over to a non-isolated CPU */
-	if (set_cpus_allowed(current, non_isolated_cpus) < 0)
+	if (set_cpus_allowed_ptr(current, &non_isolated_cpus) < 0)
 		BUG();
 	sched_init_granularity();
 }
 #else
 void __init sched_init_smp(void)
 {
+#if defined(CONFIG_NUMA)
+	sched_group_nodes_bycpu = kzalloc(nr_cpu_ids * sizeof(void **),
+								GFP_KERNEL);
+	BUG_ON(sched_group_nodes_bycpu == NULL);
+#endif
 	sched_init_granularity();
 }
 #endif /* CONFIG_SMP */
@@ -7117,6 +8009,7 @@ int in_sched_functions(unsigned long addr)
 static void init_cfs_rq(struct cfs_rq *cfs_rq, struct rq *rq)
 {
 	cfs_rq->tasks_timeline = RB_ROOT;
+	INIT_LIST_HEAD(&cfs_rq->tasks);
 #ifdef CONFIG_FAIR_GROUP_SCHED
 	cfs_rq->rq = rq;
 #endif
@@ -7146,6 +8039,8 @@ static void init_rt_rq(struct rt_rq *rt_rq, struct rq *rq)
 
 	rt_rq->rt_time = 0;
 	rt_rq->rt_throttled = 0;
+	rt_rq->rt_runtime = 0;
+	spin_lock_init(&rt_rq->rt_runtime_lock);
 
 #ifdef CONFIG_RT_GROUP_SCHED
 	rt_rq->rt_nr_boosted = 0;
@@ -7154,10 +8049,11 @@ static void init_rt_rq(struct rt_rq *rt_rq, struct rq *rq)
 }
 
 #ifdef CONFIG_FAIR_GROUP_SCHED
-static void init_tg_cfs_entry(struct rq *rq, struct task_group *tg,
-		struct cfs_rq *cfs_rq, struct sched_entity *se,
-		int cpu, int add)
+static void init_tg_cfs_entry(struct task_group *tg, struct cfs_rq *cfs_rq,
+				struct sched_entity *se, int cpu, int add,
+				struct sched_entity *parent)
 {
+	struct rq *rq = cpu_rq(cpu);
 	tg->cfs_rq[cpu] = cfs_rq;
 	init_cfs_rq(cfs_rq, rq);
 	cfs_rq->tg = tg;
@@ -7165,45 +8061,132 @@ static void init_tg_cfs_entry(struct rq *rq, struct task_group *tg,
 		list_add(&cfs_rq->leaf_cfs_rq_list, &rq->leaf_cfs_rq_list);
 
 	tg->se[cpu] = se;
-	se->cfs_rq = &rq->cfs;
+	/* se could be NULL for init_task_group */
+	if (!se)
+		return;
+
+	if (!parent)
+		se->cfs_rq = &rq->cfs;
+	else
+		se->cfs_rq = parent->my_q;
+
 	se->my_q = cfs_rq;
 	se->load.weight = tg->shares;
 	se->load.inv_weight = div64_64(1ULL<<32, se->load.weight);
-	se->parent = NULL;
+	se->parent = parent;
 }
 #endif
 
 #ifdef CONFIG_RT_GROUP_SCHED
-static void init_tg_rt_entry(struct rq *rq, struct task_group *tg,
-		struct rt_rq *rt_rq, struct sched_rt_entity *rt_se,
-		int cpu, int add)
+static void init_tg_rt_entry(struct task_group *tg, struct rt_rq *rt_rq,
+		struct sched_rt_entity *rt_se, int cpu, int add,
+		struct sched_rt_entity *parent)
 {
+	struct rq *rq = cpu_rq(cpu);
+
 	tg->rt_rq[cpu] = rt_rq;
 	init_rt_rq(rt_rq, rq);
 	rt_rq->tg = tg;
 	rt_rq->rt_se = rt_se;
+	rt_rq->rt_runtime = tg->rt_bandwidth.rt_runtime;
 	if (add)
 		list_add(&rt_rq->leaf_rt_rq_list, &rq->leaf_rt_rq_list);
 
 	tg->rt_se[cpu] = rt_se;
+	if (!rt_se)
+		return;
+
+	if (!parent)
+		rt_se->rt_rq = &rq->rt;
+	else
+		rt_se->rt_rq = parent->my_q;
+
 	rt_se->rt_rq = &rq->rt;
 	rt_se->my_q = rt_rq;
-	rt_se->parent = NULL;
+	rt_se->parent = parent;
 	INIT_LIST_HEAD(&rt_se->run_list);
 }
 #endif
 
 void __init sched_init(void)
 {
-	int highest_cpu = 0;
 	int i, j;
+	unsigned long alloc_size = 0, ptr;
+
+#ifdef CONFIG_FAIR_GROUP_SCHED
+	alloc_size += 2 * nr_cpu_ids * sizeof(void **);
+#endif
+#ifdef CONFIG_RT_GROUP_SCHED
+	alloc_size += 2 * nr_cpu_ids * sizeof(void **);
+#endif
+#ifdef CONFIG_USER_SCHED
+	alloc_size *= 2;
+#endif
+	/*
+	 * As sched_init() is called before page_alloc is setup,
+	 * we use alloc_bootmem().
+	 */
+	if (alloc_size) {
+		ptr = (unsigned long)alloc_bootmem_low(alloc_size);
+
+#ifdef CONFIG_FAIR_GROUP_SCHED
+		init_task_group.se = (struct sched_entity **)ptr;
+		ptr += nr_cpu_ids * sizeof(void **);
+
+		init_task_group.cfs_rq = (struct cfs_rq **)ptr;
+		ptr += nr_cpu_ids * sizeof(void **);
+
+#ifdef CONFIG_USER_SCHED
+		root_task_group.se = (struct sched_entity **)ptr;
+		ptr += nr_cpu_ids * sizeof(void **);
+
+		root_task_group.cfs_rq = (struct cfs_rq **)ptr;
+		ptr += nr_cpu_ids * sizeof(void **);
+#endif
+#endif
+#ifdef CONFIG_RT_GROUP_SCHED
+		init_task_group.rt_se = (struct sched_rt_entity **)ptr;
+		ptr += nr_cpu_ids * sizeof(void **);
+
+		init_task_group.rt_rq = (struct rt_rq **)ptr;
+		ptr += nr_cpu_ids * sizeof(void **);
+
+#ifdef CONFIG_USER_SCHED
+		root_task_group.rt_se = (struct sched_rt_entity **)ptr;
+		ptr += nr_cpu_ids * sizeof(void **);
+
+		root_task_group.rt_rq = (struct rt_rq **)ptr;
+		ptr += nr_cpu_ids * sizeof(void **);
+#endif
+#endif
+	}
 
 #ifdef CONFIG_SMP
+	init_aggregate();
 	init_defrootdomain();
 #endif
 
+	init_rt_bandwidth(&def_rt_bandwidth,
+			global_rt_period(), global_rt_runtime());
+
+#ifdef CONFIG_RT_GROUP_SCHED
+	init_rt_bandwidth(&init_task_group.rt_bandwidth,
+			global_rt_period(), global_rt_runtime());
+#ifdef CONFIG_USER_SCHED
+	init_rt_bandwidth(&root_task_group.rt_bandwidth,
+			global_rt_period(), RUNTIME_INF);
+#endif
+#endif
+
 #ifdef CONFIG_GROUP_SCHED
 	list_add(&init_task_group.list, &task_groups);
+	INIT_LIST_HEAD(&init_task_group.children);
+
+#ifdef CONFIG_USER_SCHED
+	INIT_LIST_HEAD(&root_task_group.children);
+	init_task_group.parent = &root_task_group;
+	list_add(&init_task_group.siblings, &root_task_group.children);
+#endif
 #endif
 
 	for_each_possible_cpu(i) {
@@ -7214,26 +8197,68 @@ void __init sched_init(void)
 		lockdep_set_class(&rq->lock, &rq->rq_lock_key);
 		rq->nr_running = 0;
 		rq->clock = 1;
+		update_last_tick_seen(rq);
 		init_cfs_rq(&rq->cfs, rq);
 		init_rt_rq(&rq->rt, rq);
 #ifdef CONFIG_FAIR_GROUP_SCHED
 		init_task_group.shares = init_task_group_load;
 		INIT_LIST_HEAD(&rq->leaf_cfs_rq_list);
-		init_tg_cfs_entry(rq, &init_task_group,
+#ifdef CONFIG_CGROUP_SCHED
+		/*
+		 * How much cpu bandwidth does init_task_group get?
+		 *
+		 * In case of task-groups formed thr' the cgroup filesystem, it
+		 * gets 100% of the cpu resources in the system. This overall
+		 * system cpu resource is divided among the tasks of
+		 * init_task_group and its child task-groups in a fair manner,
+		 * based on each entity's (task or task-group's) weight
+		 * (se->load.weight).
+		 *
+		 * In other words, if init_task_group has 10 tasks of weight
+		 * 1024) and two child groups A0 and A1 (of weight 1024 each),
+		 * then A0's share of the cpu resource is:
+		 *
+		 * 	A0's bandwidth = 1024 / (10*1024 + 1024 + 1024) = 8.33%
+		 *
+		 * We achieve this by letting init_task_group's tasks sit
+		 * directly in rq->cfs (i.e init_task_group->se[] = NULL).
+		 */
+		init_tg_cfs_entry(&init_task_group, &rq->cfs, NULL, i, 1, NULL);
+#elif defined CONFIG_USER_SCHED
+		root_task_group.shares = NICE_0_LOAD;
+		init_tg_cfs_entry(&root_task_group, &rq->cfs, NULL, i, 0, NULL);
+		/*
+		 * In case of task-groups formed thr' the user id of tasks,
+		 * init_task_group represents tasks belonging to root user.
+		 * Hence it forms a sibling of all subsequent groups formed.
+		 * In this case, init_task_group gets only a fraction of overall
+		 * system cpu resource, based on the weight assigned to root
+		 * user's cpu share (INIT_TASK_GROUP_LOAD). This is accomplished
+		 * by letting tasks of init_task_group sit in a separate cfs_rq
+		 * (init_cfs_rq) and having one entity represent this group of
+		 * tasks in rq->cfs (i.e init_task_group->se[] != NULL).
+		 */
+		init_tg_cfs_entry(&init_task_group,
 				&per_cpu(init_cfs_rq, i),
-				&per_cpu(init_sched_entity, i), i, 1);
+				&per_cpu(init_sched_entity, i), i, 1,
+				root_task_group.se[i]);
 
 #endif
+#endif /* CONFIG_FAIR_GROUP_SCHED */
+
+		rq->rt.rt_runtime = def_rt_bandwidth.rt_runtime;
 #ifdef CONFIG_RT_GROUP_SCHED
-		init_task_group.rt_runtime =
-			sysctl_sched_rt_runtime * NSEC_PER_USEC;
 		INIT_LIST_HEAD(&rq->leaf_rt_rq_list);
-		init_tg_rt_entry(rq, &init_task_group,
+#ifdef CONFIG_CGROUP_SCHED
+		init_tg_rt_entry(&init_task_group, &rq->rt, NULL, i, 1, NULL);
+#elif defined CONFIG_USER_SCHED
+		init_tg_rt_entry(&root_task_group, &rq->rt, NULL, i, 0, NULL);
+		init_tg_rt_entry(&init_task_group,
 				&per_cpu(init_rt_rq, i),
-				&per_cpu(init_sched_rt_entity, i), i, 1);
+				&per_cpu(init_sched_rt_entity, i), i, 1,
+				root_task_group.rt_se[i]);
+#endif
 #endif
-		rq->rt_period_expire = 0;
-		rq->rt_throttled = 0;
 
 		for (j = 0; j < CPU_LOAD_IDX_MAX; j++)
 			rq->cpu_load[j] = 0;
@@ -7250,7 +8275,6 @@ void __init sched_init(void)
 #endif
 		init_rq_hrtick(rq);
 		atomic_set(&rq->nr_iowait, 0);
-		highest_cpu = i;
 	}
 
 	set_load_weight(&init_task);
@@ -7260,7 +8284,6 @@ void __init sched_init(void)
 #endif
 
 #ifdef CONFIG_SMP
-	nr_cpu_ids = highest_cpu + 1;
 	open_softirq(SCHED_SOFTIRQ, run_rebalance_domains, NULL);
 #endif
 
@@ -7419,8 +8442,6 @@ void set_curr_task(int cpu, struct task_struct *p)
 
 #endif
 
-#ifdef CONFIG_GROUP_SCHED
-
 #ifdef CONFIG_FAIR_GROUP_SCHED
 static void free_fair_sched_group(struct task_group *tg)
 {
@@ -7437,17 +8458,18 @@ static void free_fair_sched_group(struct task_group *tg)
 	kfree(tg->se);
 }
 
-static int alloc_fair_sched_group(struct task_group *tg)
+static
+int alloc_fair_sched_group(struct task_group *tg, struct task_group *parent)
 {
 	struct cfs_rq *cfs_rq;
-	struct sched_entity *se;
+	struct sched_entity *se, *parent_se;
 	struct rq *rq;
 	int i;
 
-	tg->cfs_rq = kzalloc(sizeof(cfs_rq) * NR_CPUS, GFP_KERNEL);
+	tg->cfs_rq = kzalloc(sizeof(cfs_rq) * nr_cpu_ids, GFP_KERNEL);
 	if (!tg->cfs_rq)
 		goto err;
-	tg->se = kzalloc(sizeof(se) * NR_CPUS, GFP_KERNEL);
+	tg->se = kzalloc(sizeof(se) * nr_cpu_ids, GFP_KERNEL);
 	if (!tg->se)
 		goto err;
 
@@ -7466,7 +8488,8 @@ static int alloc_fair_sched_group(struct task_group *tg)
 		if (!se)
 			goto err;
 
-		init_tg_cfs_entry(rq, tg, cfs_rq, se, i, 0);
+		parent_se = parent ? parent->se[i] : NULL;
+		init_tg_cfs_entry(tg, cfs_rq, se, i, 0, parent_se);
 	}
 
 	return 1;
@@ -7490,7 +8513,8 @@ static inline void free_fair_sched_group(struct task_group *tg)
 {
 }
 
-static inline int alloc_fair_sched_group(struct task_group *tg)
+static inline
+int alloc_fair_sched_group(struct task_group *tg, struct task_group *parent)
 {
 	return 1;
 }
@@ -7509,6 +8533,8 @@ static void free_rt_sched_group(struct task_group *tg)
 {
 	int i;
 
+	destroy_rt_bandwidth(&tg->rt_bandwidth);
+
 	for_each_possible_cpu(i) {
 		if (tg->rt_rq)
 			kfree(tg->rt_rq[i]);
@@ -7520,21 +8546,23 @@ static void free_rt_sched_group(struct task_group *tg)
 	kfree(tg->rt_se);
 }
 
-static int alloc_rt_sched_group(struct task_group *tg)
+static
+int alloc_rt_sched_group(struct task_group *tg, struct task_group *parent)
 {
 	struct rt_rq *rt_rq;
-	struct sched_rt_entity *rt_se;
+	struct sched_rt_entity *rt_se, *parent_se;
 	struct rq *rq;
 	int i;
 
-	tg->rt_rq = kzalloc(sizeof(rt_rq) * NR_CPUS, GFP_KERNEL);
+	tg->rt_rq = kzalloc(sizeof(rt_rq) * nr_cpu_ids, GFP_KERNEL);
 	if (!tg->rt_rq)
 		goto err;
-	tg->rt_se = kzalloc(sizeof(rt_se) * NR_CPUS, GFP_KERNEL);
+	tg->rt_se = kzalloc(sizeof(rt_se) * nr_cpu_ids, GFP_KERNEL);
 	if (!tg->rt_se)
 		goto err;
 
-	tg->rt_runtime = 0;
+	init_rt_bandwidth(&tg->rt_bandwidth,
+			ktime_to_ns(def_rt_bandwidth.rt_period), 0);
 
 	for_each_possible_cpu(i) {
 		rq = cpu_rq(i);
@@ -7549,7 +8577,8 @@ static int alloc_rt_sched_group(struct task_group *tg)
 		if (!rt_se)
 			goto err;
 
-		init_tg_rt_entry(rq, tg, rt_rq, rt_se, i, 0);
+		parent_se = parent ? parent->rt_se[i] : NULL;
+		init_tg_rt_entry(tg, rt_rq, rt_se, i, 0, parent_se);
 	}
 
 	return 1;
@@ -7573,7 +8602,8 @@ static inline void free_rt_sched_group(struct task_group *tg)
 {
 }
 
-static inline int alloc_rt_sched_group(struct task_group *tg)
+static inline
+int alloc_rt_sched_group(struct task_group *tg, struct task_group *parent)
 {
 	return 1;
 }
@@ -7587,6 +8617,7 @@ static inline void unregister_rt_sched_group(struct task_group *tg, int cpu)
 }
 #endif
 
+#ifdef CONFIG_GROUP_SCHED
 static void free_sched_group(struct task_group *tg)
 {
 	free_fair_sched_group(tg);
@@ -7595,7 +8626,7 @@ static void free_sched_group(struct task_group *tg)
 }
 
 /* allocate runqueue etc for a new task group */
-struct task_group *sched_create_group(void)
+struct task_group *sched_create_group(struct task_group *parent)
 {
 	struct task_group *tg;
 	unsigned long flags;
@@ -7605,10 +8636,10 @@ struct task_group *sched_create_group(void)
 	if (!tg)
 		return ERR_PTR(-ENOMEM);
 
-	if (!alloc_fair_sched_group(tg))
+	if (!alloc_fair_sched_group(tg, parent))
 		goto err;
 
-	if (!alloc_rt_sched_group(tg))
+	if (!alloc_rt_sched_group(tg, parent))
 		goto err;
 
 	spin_lock_irqsave(&task_group_lock, flags);
@@ -7617,6 +8648,12 @@ struct task_group *sched_create_group(void)
 		register_rt_sched_group(tg, i);
 	}
 	list_add_rcu(&tg->list, &task_groups);
+
+	WARN_ON(!parent); /* root should already exist */
+
+	tg->parent = parent;
+	list_add_rcu(&tg->siblings, &parent->children);
+	INIT_LIST_HEAD(&tg->children);
 	spin_unlock_irqrestore(&task_group_lock, flags);
 
 	return tg;
@@ -7645,6 +8682,7 @@ void sched_destroy_group(struct task_group *tg)
 		unregister_rt_sched_group(tg, i);
 	}
 	list_del_rcu(&tg->list);
+	list_del_rcu(&tg->siblings);
 	spin_unlock_irqrestore(&task_group_lock, flags);
 
 	/* wait for possible concurrent references to cfs_rqs complete */
@@ -7688,16 +8726,14 @@ void sched_move_task(struct task_struct *tsk)
 
 	task_rq_unlock(rq, &flags);
 }
+#endif
 
 #ifdef CONFIG_FAIR_GROUP_SCHED
-static void set_se_shares(struct sched_entity *se, unsigned long shares)
+static void __set_se_shares(struct sched_entity *se, unsigned long shares)
 {
 	struct cfs_rq *cfs_rq = se->cfs_rq;
-	struct rq *rq = cfs_rq->rq;
 	int on_rq;
 
-	spin_lock_irq(&rq->lock);
-
 	on_rq = se->on_rq;
 	if (on_rq)
 		dequeue_entity(cfs_rq, se, 0);
@@ -7707,8 +8743,17 @@ static void set_se_shares(struct sched_entity *se, unsigned long shares)
 
 	if (on_rq)
 		enqueue_entity(cfs_rq, se, 0);
+}
 
-	spin_unlock_irq(&rq->lock);
+static void set_se_shares(struct sched_entity *se, unsigned long shares)
+{
+	struct cfs_rq *cfs_rq = se->cfs_rq;
+	struct rq *rq = cfs_rq->rq;
+	unsigned long flags;
+
+	spin_lock_irqsave(&rq->lock, flags);
+	__set_se_shares(se, shares);
+	spin_unlock_irqrestore(&rq->lock, flags);
 }
 
 static DEFINE_MUTEX(shares_mutex);
@@ -7719,12 +8764,18 @@ int sched_group_set_shares(struct task_group *tg, unsigned long shares)
 	unsigned long flags;
 
 	/*
+	 * We can't change the weight of the root cgroup.
+	 */
+	if (!tg->se[0])
+		return -EINVAL;
+
+	/*
 	 * A weight of 0 or 1 can cause arithmetics problems.
 	 * (The default weight is 1024 - so there's no practical
 	 *  limitation from this.)
 	 */
-	if (shares < 2)
-		shares = 2;
+	if (shares < MIN_SHARES)
+		shares = MIN_SHARES;
 
 	mutex_lock(&shares_mutex);
 	if (tg->shares == shares)
@@ -7733,6 +8784,7 @@ int sched_group_set_shares(struct task_group *tg, unsigned long shares)
 	spin_lock_irqsave(&task_group_lock, flags);
 	for_each_possible_cpu(i)
 		unregister_fair_sched_group(tg, i);
+	list_del_rcu(&tg->siblings);
 	spin_unlock_irqrestore(&task_group_lock, flags);
 
 	/* wait for any ongoing reference to this group to finish */
@@ -7743,8 +8795,13 @@ int sched_group_set_shares(struct task_group *tg, unsigned long shares)
 	 * w/o tripping rebalance_share or load_balance_fair.
 	 */
 	tg->shares = shares;
-	for_each_possible_cpu(i)
-		set_se_shares(tg->se[i], shares);
+	for_each_possible_cpu(i) {
+		/*
+		 * force a rebalance
+		 */
+		cfs_rq_set_shares(tg->cfs_rq[i], 0);
+		set_se_shares(tg->se[i], shares/nr_cpu_ids);
+	}
 
 	/*
 	 * Enable load balance activity on this group, by inserting it back on
@@ -7753,6 +8810,7 @@ int sched_group_set_shares(struct task_group *tg, unsigned long shares)
 	spin_lock_irqsave(&task_group_lock, flags);
 	for_each_possible_cpu(i)
 		register_fair_sched_group(tg, i);
+	list_add_rcu(&tg->siblings, &tg->parent->children);
 	spin_unlock_irqrestore(&task_group_lock, flags);
 done:
 	mutex_unlock(&shares_mutex);
@@ -7779,26 +8837,58 @@ static unsigned long to_ratio(u64 period, u64 runtime)
 	return div64_64(runtime << 16, period);
 }
 
+#ifdef CONFIG_CGROUP_SCHED
+static int __rt_schedulable(struct task_group *tg, u64 period, u64 runtime)
+{
+	struct task_group *tgi, *parent = tg->parent;
+	unsigned long total = 0;
+
+	if (!parent) {
+		if (global_rt_period() < period)
+			return 0;
+
+		return to_ratio(period, runtime) <
+			to_ratio(global_rt_period(), global_rt_runtime());
+	}
+
+	if (ktime_to_ns(parent->rt_bandwidth.rt_period) < period)
+		return 0;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(tgi, &parent->children, siblings) {
+		if (tgi == tg)
+			continue;
+
+		total += to_ratio(ktime_to_ns(tgi->rt_bandwidth.rt_period),
+				tgi->rt_bandwidth.rt_runtime);
+	}
+	rcu_read_unlock();
+
+	return total + to_ratio(period, runtime) <
+		to_ratio(ktime_to_ns(parent->rt_bandwidth.rt_period),
+				parent->rt_bandwidth.rt_runtime);
+}
+#elif defined CONFIG_USER_SCHED
 static int __rt_schedulable(struct task_group *tg, u64 period, u64 runtime)
 {
 	struct task_group *tgi;
 	unsigned long total = 0;
 	unsigned long global_ratio =
-		to_ratio(sysctl_sched_rt_period,
-			 sysctl_sched_rt_runtime < 0 ?
-				RUNTIME_INF : sysctl_sched_rt_runtime);
+		to_ratio(global_rt_period(), global_rt_runtime());
 
 	rcu_read_lock();
 	list_for_each_entry_rcu(tgi, &task_groups, list) {
 		if (tgi == tg)
 			continue;
 
-		total += to_ratio(period, tgi->rt_runtime);
+		total += to_ratio(ktime_to_ns(tgi->rt_bandwidth.rt_period),
+				tgi->rt_bandwidth.rt_runtime);
 	}
 	rcu_read_unlock();
 
 	return total + to_ratio(period, runtime) < global_ratio;
 }
+#endif
 
 /* Must be called with tasklist_lock held */
 static inline int tg_has_rt_tasks(struct task_group *tg)
@@ -7811,19 +8901,14 @@ static inline int tg_has_rt_tasks(struct task_group *tg)
 	return 0;
 }
 
-int sched_group_set_rt_runtime(struct task_group *tg, long rt_runtime_us)
+static int tg_set_bandwidth(struct task_group *tg,
+		u64 rt_period, u64 rt_runtime)
 {
-	u64 rt_runtime, rt_period;
-	int err = 0;
-
-	rt_period = (u64)sysctl_sched_rt_period * NSEC_PER_USEC;
-	rt_runtime = (u64)rt_runtime_us * NSEC_PER_USEC;
-	if (rt_runtime_us == -1)
-		rt_runtime = RUNTIME_INF;
+	int i, err = 0;
 
 	mutex_lock(&rt_constraints_mutex);
 	read_lock(&tasklist_lock);
-	if (rt_runtime_us == 0 && tg_has_rt_tasks(tg)) {
+	if (rt_runtime == 0 && tg_has_rt_tasks(tg)) {
 		err = -EBUSY;
 		goto unlock;
 	}
@@ -7831,7 +8916,19 @@ int sched_group_set_rt_runtime(struct task_group *tg, long rt_runtime_us)
 		err = -EINVAL;
 		goto unlock;
 	}
-	tg->rt_runtime = rt_runtime;
+
+	spin_lock_irq(&tg->rt_bandwidth.rt_runtime_lock);
+	tg->rt_bandwidth.rt_period = ns_to_ktime(rt_period);
+	tg->rt_bandwidth.rt_runtime = rt_runtime;
+
+	for_each_possible_cpu(i) {
+		struct rt_rq *rt_rq = tg->rt_rq[i];
+
+		spin_lock(&rt_rq->rt_runtime_lock);
+		rt_rq->rt_runtime = rt_runtime;
+		spin_unlock(&rt_rq->rt_runtime_lock);
+	}
+	spin_unlock_irq(&tg->rt_bandwidth.rt_runtime_lock);
  unlock:
 	read_unlock(&tasklist_lock);
 	mutex_unlock(&rt_constraints_mutex);
@@ -7839,19 +8936,109 @@ int sched_group_set_rt_runtime(struct task_group *tg, long rt_runtime_us)
 	return err;
 }
 
+int sched_group_set_rt_runtime(struct task_group *tg, long rt_runtime_us)
+{
+	u64 rt_runtime, rt_period;
+
+	rt_period = ktime_to_ns(tg->rt_bandwidth.rt_period);
+	rt_runtime = (u64)rt_runtime_us * NSEC_PER_USEC;
+	if (rt_runtime_us < 0)
+		rt_runtime = RUNTIME_INF;
+
+	return tg_set_bandwidth(tg, rt_period, rt_runtime);
+}
+
 long sched_group_rt_runtime(struct task_group *tg)
 {
 	u64 rt_runtime_us;
 
-	if (tg->rt_runtime == RUNTIME_INF)
+	if (tg->rt_bandwidth.rt_runtime == RUNTIME_INF)
 		return -1;
 
-	rt_runtime_us = tg->rt_runtime;
+	rt_runtime_us = tg->rt_bandwidth.rt_runtime;
 	do_div(rt_runtime_us, NSEC_PER_USEC);
 	return rt_runtime_us;
 }
+
+int sched_group_set_rt_period(struct task_group *tg, long rt_period_us)
+{
+	u64 rt_runtime, rt_period;
+
+	rt_period = (u64)rt_period_us * NSEC_PER_USEC;
+	rt_runtime = tg->rt_bandwidth.rt_runtime;
+
+	return tg_set_bandwidth(tg, rt_period, rt_runtime);
+}
+
+long sched_group_rt_period(struct task_group *tg)
+{
+	u64 rt_period_us;
+
+	rt_period_us = ktime_to_ns(tg->rt_bandwidth.rt_period);
+	do_div(rt_period_us, NSEC_PER_USEC);
+	return rt_period_us;
+}
+
+static int sched_rt_global_constraints(void)
+{
+	int ret = 0;
+
+	mutex_lock(&rt_constraints_mutex);
+	if (!__rt_schedulable(NULL, 1, 0))
+		ret = -EINVAL;
+	mutex_unlock(&rt_constraints_mutex);
+
+	return ret;
+}
+#else
+static int sched_rt_global_constraints(void)
+{
+	unsigned long flags;
+	int i;
+
+	spin_lock_irqsave(&def_rt_bandwidth.rt_runtime_lock, flags);
+	for_each_possible_cpu(i) {
+		struct rt_rq *rt_rq = &cpu_rq(i)->rt;
+
+		spin_lock(&rt_rq->rt_runtime_lock);
+		rt_rq->rt_runtime = global_rt_runtime();
+		spin_unlock(&rt_rq->rt_runtime_lock);
+	}
+	spin_unlock_irqrestore(&def_rt_bandwidth.rt_runtime_lock, flags);
+
+	return 0;
+}
 #endif
-#endif	/* CONFIG_GROUP_SCHED */
+
+int sched_rt_handler(struct ctl_table *table, int write,
+		struct file *filp, void __user *buffer, size_t *lenp,
+		loff_t *ppos)
+{
+	int ret;
+	int old_period, old_runtime;
+	static DEFINE_MUTEX(mutex);
+
+	mutex_lock(&mutex);
+	old_period = sysctl_sched_rt_period;
+	old_runtime = sysctl_sched_rt_runtime;
+
+	ret = proc_dointvec(table, write, filp, buffer, lenp, ppos);
+
+	if (!ret && write) {
+		ret = sched_rt_global_constraints();
+		if (ret) {
+			sysctl_sched_rt_period = old_period;
+			sysctl_sched_rt_runtime = old_runtime;
+		} else {
+			def_rt_bandwidth.rt_runtime = global_rt_runtime();
+			def_rt_bandwidth.rt_period =
+				ns_to_ktime(global_rt_period());
+		}
+	}
+	mutex_unlock(&mutex);
+
+	return ret;
+}
 
 #ifdef CONFIG_CGROUP_SCHED
 
@@ -7865,7 +9052,7 @@ static inline struct task_group *cgroup_tg(struct cgroup *cgrp)
 static struct cgroup_subsys_state *
 cpu_cgroup_create(struct cgroup_subsys *ss, struct cgroup *cgrp)
 {
-	struct task_group *tg;
+	struct task_group *tg, *parent;
 
 	if (!cgrp->parent) {
 		/* This is early initialization for the top cgroup */
@@ -7873,11 +9060,8 @@ cpu_cgroup_create(struct cgroup_subsys *ss, struct cgroup *cgrp)
 		return &init_task_group.css;
 	}
 
-	/* we support only 1-level deep hierarchical scheduler atm */
-	if (cgrp->parent->parent)
-		return ERR_PTR(-EINVAL);
-
-	tg = sched_create_group();
+	parent = cgroup_tg(cgrp->parent);
+	tg = sched_create_group(parent);
 	if (IS_ERR(tg))
 		return ERR_PTR(-ENOMEM);
 
@@ -7901,7 +9085,7 @@ cpu_cgroup_can_attach(struct cgroup_subsys *ss, struct cgroup *cgrp,
 {
 #ifdef CONFIG_RT_GROUP_SCHED
 	/* Don't accept realtime tasks when there is no way for them to run */
-	if (rt_task(tsk) && cgroup_tg(cgrp)->rt_runtime == 0)
+	if (rt_task(tsk) && cgroup_tg(cgrp)->rt_bandwidth.rt_runtime == 0)
 		return -EINVAL;
 #else
 	/* We don't support RT-tasks being in separate groups */
@@ -7935,7 +9119,7 @@ static u64 cpu_shares_read_uint(struct cgroup *cgrp, struct cftype *cft)
 #endif
 
 #ifdef CONFIG_RT_GROUP_SCHED
-static int cpu_rt_runtime_write(struct cgroup *cgrp, struct cftype *cft,
+static ssize_t cpu_rt_runtime_write(struct cgroup *cgrp, struct cftype *cft,
 				struct file *file,
 				const char __user *userbuf,
 				size_t nbytes, loff_t *unused_ppos)
@@ -7979,6 +9163,17 @@ static ssize_t cpu_rt_runtime_read(struct cgroup *cgrp, struct cftype *cft,
 
 	return simple_read_from_buffer(buf, nbytes, ppos, tmp, len);
 }
+
+static int cpu_rt_period_write_uint(struct cgroup *cgrp, struct cftype *cftype,
+		u64 rt_period_us)
+{
+	return sched_group_set_rt_period(cgroup_tg(cgrp), rt_period_us);
+}
+
+static u64 cpu_rt_period_read_uint(struct cgroup *cgrp, struct cftype *cft)
+{
+	return sched_group_rt_period(cgroup_tg(cgrp));
+}
 #endif
 
 static struct cftype cpu_files[] = {
@@ -7995,6 +9190,11 @@ static struct cftype cpu_files[] = {
 		.read = cpu_rt_runtime_read,
 		.write = cpu_rt_runtime_write,
 	},
+	{
+		.name = "rt_period_us",
+		.read_uint = cpu_rt_period_read_uint,
+		.write_uint = cpu_rt_period_write_uint,
+	},
 #endif
 };
 
@@ -8035,9 +9235,9 @@ struct cpuacct {
 struct cgroup_subsys cpuacct_subsys;
 
 /* return cpu accounting group corresponding to this container */
-static inline struct cpuacct *cgroup_ca(struct cgroup *cont)
+static inline struct cpuacct *cgroup_ca(struct cgroup *cgrp)
 {
-	return container_of(cgroup_subsys_state(cont, cpuacct_subsys_id),
+	return container_of(cgroup_subsys_state(cgrp, cpuacct_subsys_id),
 			    struct cpuacct, css);
 }
 
@@ -8050,7 +9250,7 @@ static inline struct cpuacct *task_ca(struct task_struct *tsk)
 
 /* create a new cpu accounting group */
 static struct cgroup_subsys_state *cpuacct_create(
-	struct cgroup_subsys *ss, struct cgroup *cont)
+	struct cgroup_subsys *ss, struct cgroup *cgrp)
 {
 	struct cpuacct *ca = kzalloc(sizeof(*ca), GFP_KERNEL);
 
@@ -8068,18 +9268,18 @@ static struct cgroup_subsys_state *cpuacct_create(
 
 /* destroy an existing cpu accounting group */
 static void
-cpuacct_destroy(struct cgroup_subsys *ss, struct cgroup *cont)
+cpuacct_destroy(struct cgroup_subsys *ss, struct cgroup *cgrp)
 {
-	struct cpuacct *ca = cgroup_ca(cont);
+	struct cpuacct *ca = cgroup_ca(cgrp);
 
 	free_percpu(ca->cpuusage);
 	kfree(ca);
 }
 
 /* return total cpu usage (in nanoseconds) of a group */
-static u64 cpuusage_read(struct cgroup *cont, struct cftype *cft)
+static u64 cpuusage_read(struct cgroup *cgrp, struct cftype *cft)
 {
-	struct cpuacct *ca = cgroup_ca(cont);
+	struct cpuacct *ca = cgroup_ca(cgrp);
 	u64 totalcpuusage = 0;
 	int i;
 
@@ -8098,16 +9298,40 @@ static u64 cpuusage_read(struct cgroup *cont, struct cftype *cft)
 	return totalcpuusage;
 }
 
+static int cpuusage_write(struct cgroup *cgrp, struct cftype *cftype,
+								u64 reset)
+{
+	struct cpuacct *ca = cgroup_ca(cgrp);
+	int err = 0;
+	int i;
+
+	if (reset) {
+		err = -EINVAL;
+		goto out;
+	}
+
+	for_each_possible_cpu(i) {
+		u64 *cpuusage = percpu_ptr(ca->cpuusage, i);
+
+		spin_lock_irq(&cpu_rq(i)->lock);
+		*cpuusage = 0;
+		spin_unlock_irq(&cpu_rq(i)->lock);
+	}
+out:
+	return err;
+}
+
 static struct cftype files[] = {
 	{
 		.name = "usage",
 		.read_uint = cpuusage_read,
+		.write_uint = cpuusage_write,
 	},
 };
 
-static int cpuacct_populate(struct cgroup_subsys *ss, struct cgroup *cont)
+static int cpuacct_populate(struct cgroup_subsys *ss, struct cgroup *cgrp)
 {
-	return cgroup_add_files(cont, ss, files, ARRAY_SIZE(files));
+	return cgroup_add_files(cgrp, ss, files, ARRAY_SIZE(files));
 }
 
 /*
diff --git a/kernel/sched_debug.c b/kernel/sched_debug.c
index ef358ba..f3f4af4 100644
--- a/kernel/sched_debug.c
+++ b/kernel/sched_debug.c
@@ -67,14 +67,24 @@ print_task(struct seq_file *m, struct rq *rq, struct task_struct *p)
 		(long long)(p->nvcsw + p->nivcsw),
 		p->prio);
 #ifdef CONFIG_SCHEDSTATS
-	SEQ_printf(m, "%9Ld.%06ld %9Ld.%06ld %9Ld.%06ld\n",
+	SEQ_printf(m, "%9Ld.%06ld %9Ld.%06ld %9Ld.%06ld",
 		SPLIT_NS(p->se.vruntime),
 		SPLIT_NS(p->se.sum_exec_runtime),
 		SPLIT_NS(p->se.sum_sleep_runtime));
 #else
-	SEQ_printf(m, "%15Ld %15Ld %15Ld.%06ld %15Ld.%06ld %15Ld.%06ld\n",
+	SEQ_printf(m, "%15Ld %15Ld %15Ld.%06ld %15Ld.%06ld %15Ld.%06ld",
 		0LL, 0LL, 0LL, 0L, 0LL, 0L, 0LL, 0L);
 #endif
+
+#ifdef CONFIG_CGROUP_SCHED
+	{
+		char path[64];
+
+		cgroup_path(task_group(p)->css.cgroup, path, sizeof(path));
+		SEQ_printf(m, " %s", path);
+	}
+#endif
+	SEQ_printf(m, "\n");
 }
 
 static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu)
@@ -109,7 +119,21 @@ void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
 	struct sched_entity *last;
 	unsigned long flags;
 
-	SEQ_printf(m, "\ncfs_rq\n");
+#if !defined(CONFIG_CGROUP_SCHED) || !defined(CONFIG_USER_SCHED)
+	SEQ_printf(m, "\ncfs_rq[%d]:\n", cpu);
+#else
+	char path[128] = "";
+	struct cgroup *cgroup = NULL;
+	struct task_group *tg = cfs_rq->tg;
+
+	if (tg)
+		cgroup = tg->css.cgroup;
+
+	if (cgroup)
+		cgroup_path(cgroup, path, sizeof(path));
+
+	SEQ_printf(m, "\ncfs_rq[%d]:%s\n", cpu, path);
+#endif
 
 	SEQ_printf(m, "  .%-30s: %Ld.%06ld\n", "exec_clock",
 			SPLIT_NS(cfs_rq->exec_clock));
@@ -143,6 +167,11 @@ void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
 #endif
 	SEQ_printf(m, "  .%-30s: %ld\n", "nr_spread_over",
 			cfs_rq->nr_spread_over);
+#ifdef CONFIG_FAIR_GROUP_SCHED
+#ifdef CONFIG_SMP
+	SEQ_printf(m, "  .%-30s: %lu\n", "shares", cfs_rq->shares);
+#endif
+#endif
 }
 
 static void print_cpu(struct seq_file *m, int cpu)
@@ -214,7 +243,6 @@ static int sched_debug_show(struct seq_file *m, void *v)
 	PN(sysctl_sched_latency);
 	PN(sysctl_sched_min_granularity);
 	PN(sysctl_sched_wakeup_granularity);
-	PN(sysctl_sched_batch_wakeup_granularity);
 	PN(sysctl_sched_child_runs_first);
 	P(sysctl_sched_features);
 #undef PN
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 0080968..89fa32b 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -62,24 +62,14 @@ const_debug unsigned int sysctl_sched_child_runs_first = 1;
 unsigned int __read_mostly sysctl_sched_compat_yield;
 
 /*
- * SCHED_BATCH wake-up granularity.
- * (default: 10 msec * (1 + ilog(ncpus)), units: nanoseconds)
- *
- * This option delays the preemption effects of decoupled workloads
- * and reduces their over-scheduling. Synchronous workloads will still
- * have immediate wakeup/sleep latencies.
- */
-unsigned int sysctl_sched_batch_wakeup_granularity = 10000000UL;
-
-/*
  * SCHED_OTHER wake-up granularity.
- * (default: 5 msec * (1 + ilog(ncpus)), units: nanoseconds)
+ * (default: 10 msec * (1 + ilog(ncpus)), units: nanoseconds)
  *
  * This option delays the preemption effects of decoupled workloads
  * and reduces their over-scheduling. Synchronous workloads will still
  * have immediate wakeup/sleep latencies.
  */
-unsigned int sysctl_sched_wakeup_granularity = 5000000UL;
+unsigned int sysctl_sched_wakeup_granularity = 10000000UL;
 
 const_debug unsigned int sysctl_sched_migration_cost = 500000UL;
 
@@ -87,6 +77,11 @@ const_debug unsigned int sysctl_sched_migration_cost = 500000UL;
  * CFS operations on generic schedulable entities:
  */
 
+static inline struct task_struct *task_of(struct sched_entity *se)
+{
+	return container_of(se, struct task_struct, se);
+}
+
 #ifdef CONFIG_FAIR_GROUP_SCHED
 
 /* cpu runqueue to which this cfs_rq is attached */
@@ -98,6 +93,54 @@ static inline struct rq *rq_of(struct cfs_rq *cfs_rq)
 /* An entity is a task if it doesn't "own" a runqueue */
 #define entity_is_task(se)	(!se->my_q)
 
+/* Walk up scheduling entities hierarchy */
+#define for_each_sched_entity(se) \
+		for (; se; se = se->parent)
+
+static inline struct cfs_rq *task_cfs_rq(struct task_struct *p)
+{
+	return p->se.cfs_rq;
+}
+
+/* runqueue on which this entity is (to be) queued */
+static inline struct cfs_rq *cfs_rq_of(struct sched_entity *se)
+{
+	return se->cfs_rq;
+}
+
+/* runqueue "owned" by this group */
+static inline struct cfs_rq *group_cfs_rq(struct sched_entity *grp)
+{
+	return grp->my_q;
+}
+
+/* Given a group's cfs_rq on one cpu, return its corresponding cfs_rq on
+ * another cpu ('this_cpu')
+ */
+static inline struct cfs_rq *cpu_cfs_rq(struct cfs_rq *cfs_rq, int this_cpu)
+{
+	return cfs_rq->tg->cfs_rq[this_cpu];
+}
+
+/* Iterate thr' all leaf cfs_rq's on a runqueue */
+#define for_each_leaf_cfs_rq(rq, cfs_rq) \
+	list_for_each_entry_rcu(cfs_rq, &rq->leaf_cfs_rq_list, leaf_cfs_rq_list)
+
+/* Do the two (enqueued) entities belong to the same group ? */
+static inline int
+is_same_group(struct sched_entity *se, struct sched_entity *pse)
+{
+	if (se->cfs_rq == pse->cfs_rq)
+		return 1;
+
+	return 0;
+}
+
+static inline struct sched_entity *parent_entity(struct sched_entity *se)
+{
+	return se->parent;
+}
+
 #else	/* CONFIG_FAIR_GROUP_SCHED */
 
 static inline struct rq *rq_of(struct cfs_rq *cfs_rq)
@@ -107,13 +150,49 @@ static inline struct rq *rq_of(struct cfs_rq *cfs_rq)
 
 #define entity_is_task(se)	1
 
-#endif	/* CONFIG_FAIR_GROUP_SCHED */
+#define for_each_sched_entity(se) \
+		for (; se; se = NULL)
 
-static inline struct task_struct *task_of(struct sched_entity *se)
+static inline struct cfs_rq *task_cfs_rq(struct task_struct *p)
 {
-	return container_of(se, struct task_struct, se);
+	return &task_rq(p)->cfs;
+}
+
+static inline struct cfs_rq *cfs_rq_of(struct sched_entity *se)
+{
+	struct task_struct *p = task_of(se);
+	struct rq *rq = task_rq(p);
+
+	return &rq->cfs;
+}
+
+/* runqueue "owned" by this group */
+static inline struct cfs_rq *group_cfs_rq(struct sched_entity *grp)
+{
+	return NULL;
+}
+
+static inline struct cfs_rq *cpu_cfs_rq(struct cfs_rq *cfs_rq, int this_cpu)
+{
+	return &cpu_rq(this_cpu)->cfs;
+}
+
+#define for_each_leaf_cfs_rq(rq, cfs_rq) \
+		for (cfs_rq = &rq->cfs; cfs_rq; cfs_rq = NULL)
+
+static inline int
+is_same_group(struct sched_entity *se, struct sched_entity *pse)
+{
+	return 1;
+}
+
+static inline struct sched_entity *parent_entity(struct sched_entity *se)
+{
+	return NULL;
 }
 
+#endif	/* CONFIG_FAIR_GROUP_SCHED */
+
 
 /**************************************************************
  * Scheduling class tree data structure manipulation methods:
@@ -255,6 +334,34 @@ int sched_nr_latency_handler(struct ctl_table *table, int write,
 #endif
 
 /*
+ * delta *= w / rw
+ */
+static inline unsigned long
+calc_delta_weight(unsigned long delta, struct sched_entity *se)
+{
+	for_each_sched_entity(se) {
+		delta = calc_delta_mine(delta,
+				se->load.weight, &cfs_rq_of(se)->load);
+	}
+
+	return delta;
+}
+
+/*
+ * delta *= rw / w
+ */
+static inline unsigned long
+calc_delta_fair(unsigned long delta, struct sched_entity *se)
+{
+	for_each_sched_entity(se) {
+		delta = calc_delta_mine(delta,
+				cfs_rq_of(se)->load.weight, &se->load);
+	}
+
+	return delta;
+}
+
+/*
  * The idea is to set a period in which each task runs once.
  *
  * When there are too many tasks (sysctl_sched_nr_latency) we have to stretch
@@ -283,29 +390,54 @@ static u64 __sched_period(unsigned long nr_running)
  */
 static u64 sched_slice(struct cfs_rq *cfs_rq, struct sched_entity *se)
 {
-	return calc_delta_mine(__sched_period(cfs_rq->nr_running),
-			       se->load.weight, &cfs_rq->load);
+	return calc_delta_weight(__sched_period(cfs_rq->nr_running), se);
 }
 
 /*
- * We calculate the vruntime slice.
+ * We calculate the vruntime slice of a to be inserted task
  *
- * vs = s/w = p/rw
+ * vs = s*rw/w = p
  */
-static u64 __sched_vslice(unsigned long rq_weight, unsigned long nr_running)
+static u64 sched_vslice_add(struct cfs_rq *cfs_rq, struct sched_entity *se)
 {
-	u64 vslice = __sched_period(nr_running);
+	unsigned long nr_running = cfs_rq->nr_running;
 
-	vslice *= NICE_0_LOAD;
-	do_div(vslice, rq_weight);
+	if (!se->on_rq)
+		nr_running++;
 
-	return vslice;
+	return __sched_period(nr_running);
 }
 
-static u64 sched_vslice_add(struct cfs_rq *cfs_rq, struct sched_entity *se)
+/*
+ * The goal of calc_delta_asym() is to be asymmetrically around NICE_0_LOAD, in
+ * that it favours >=0 over <0.
+ *
+ *   -20         |
+ *               |
+ *     0 --------+-------
+ *             .'
+ *    19     .'
+ *
+ */
+static unsigned long
+calc_delta_asym(unsigned long delta, struct sched_entity *se)
 {
-	return __sched_vslice(cfs_rq->load.weight + se->load.weight,
-			cfs_rq->nr_running + 1);
+	struct load_weight lw = {
+		.weight = NICE_0_LOAD,
+		.inv_weight = 1UL << (WMULT_SHIFT-NICE_0_SHIFT)
+	};
+
+	for_each_sched_entity(se) {
+		struct load_weight *se_lw = &se->load;
+
+		if (se->load.weight < NICE_0_LOAD)
+			se_lw = &lw;
+
+		delta = calc_delta_mine(delta,
+				cfs_rq_of(se)->load.weight, se_lw);
+	}
+
+	return delta;
 }
 
 /*
@@ -322,11 +454,7 @@ __update_curr(struct cfs_rq *cfs_rq, struct sched_entity *curr,
 
 	curr->sum_exec_runtime += delta_exec;
 	schedstat_add(cfs_rq, exec_clock, delta_exec);
-	delta_exec_weighted = delta_exec;
-	if (unlikely(curr->load.weight != NICE_0_LOAD)) {
-		delta_exec_weighted = calc_delta_fair(delta_exec_weighted,
-							&curr->load);
-	}
+	delta_exec_weighted = calc_delta_fair(delta_exec, curr);
 	curr->vruntime += delta_exec_weighted;
 }
 
@@ -413,20 +541,43 @@ update_stats_curr_start(struct cfs_rq *cfs_rq, struct sched_entity *se)
  * Scheduling class queueing methods:
  */
 
+#if defined CONFIG_SMP && defined CONFIG_FAIR_GROUP_SCHED
+static void
+add_cfs_task_weight(struct cfs_rq *cfs_rq, unsigned long weight)
+{
+	cfs_rq->task_weight += weight;
+}
+#else
+static inline void
+add_cfs_task_weight(struct cfs_rq *cfs_rq, unsigned long weight)
+{
+}
+#endif
+
 static void
 account_entity_enqueue(struct cfs_rq *cfs_rq, struct sched_entity *se)
 {
 	update_load_add(&cfs_rq->load, se->load.weight);
+	if (!parent_entity(se))
+		inc_cpu_load(rq_of(cfs_rq), se->load.weight);
+	if (entity_is_task(se))
+		add_cfs_task_weight(cfs_rq, se->load.weight);
 	cfs_rq->nr_running++;
 	se->on_rq = 1;
+	list_add(&se->group_node, &cfs_rq->tasks);
 }
 
 static void
 account_entity_dequeue(struct cfs_rq *cfs_rq, struct sched_entity *se)
 {
 	update_load_sub(&cfs_rq->load, se->load.weight);
+	if (!parent_entity(se))
+		dec_cpu_load(rq_of(cfs_rq), se->load.weight);
+	if (entity_is_task(se))
+		add_cfs_task_weight(cfs_rq, -se->load.weight);
 	cfs_rq->nr_running--;
 	se->on_rq = 0;
+	list_del_init(&se->group_node);
 }
 
 static void enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se)
@@ -510,8 +661,12 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial)
 
 	if (!initial) {
 		/* sleeps upto a single latency don't count. */
-		if (sched_feat(NEW_FAIR_SLEEPERS))
-			vruntime -= sysctl_sched_latency;
+		if (sched_feat(NEW_FAIR_SLEEPERS)) {
+			if (sched_feat(NORMALIZED_SLEEPER))
+				vruntime -= calc_delta_weight(sysctl_sched_latency, se);
+			else
+				vruntime -= sysctl_sched_latency;
+		}
 
 		/* ensure we never gain time by being placed backwards. */
 		vruntime = max_vruntime(se->vruntime, vruntime);
@@ -627,20 +782,16 @@ set_next_entity(struct cfs_rq *cfs_rq, struct sched_entity *se)
 	se->prev_sum_exec_runtime = se->sum_exec_runtime;
 }
 
+static int
+wakeup_preempt_entity(struct sched_entity *curr, struct sched_entity *se);
+
 static struct sched_entity *
 pick_next(struct cfs_rq *cfs_rq, struct sched_entity *se)
 {
-	s64 diff, gran;
-
 	if (!cfs_rq->next)
 		return se;
 
-	diff = cfs_rq->next->vruntime - se->vruntime;
-	if (diff < 0)
-		return se;
-
-	gran = calc_delta_fair(sysctl_sched_wakeup_granularity, &cfs_rq->load);
-	if (diff > gran)
+	if (wakeup_preempt_entity(cfs_rq->next, se) != 0)
 		return se;
 
 	return cfs_rq->next;
@@ -708,101 +859,6 @@ entity_tick(struct cfs_rq *cfs_rq, struct sched_entity *curr, int queued)
  * CFS operations on tasks:
  */
 
-#ifdef CONFIG_FAIR_GROUP_SCHED
-
-/* Walk up scheduling entities hierarchy */
-#define for_each_sched_entity(se) \
-		for (; se; se = se->parent)
-
-static inline struct cfs_rq *task_cfs_rq(struct task_struct *p)
-{
-	return p->se.cfs_rq;
-}
-
-/* runqueue on which this entity is (to be) queued */
-static inline struct cfs_rq *cfs_rq_of(struct sched_entity *se)
-{
-	return se->cfs_rq;
-}
-
-/* runqueue "owned" by this group */
-static inline struct cfs_rq *group_cfs_rq(struct sched_entity *grp)
-{
-	return grp->my_q;
-}
-
-/* Given a group's cfs_rq on one cpu, return its corresponding cfs_rq on
- * another cpu ('this_cpu')
- */
-static inline struct cfs_rq *cpu_cfs_rq(struct cfs_rq *cfs_rq, int this_cpu)
-{
-	return cfs_rq->tg->cfs_rq[this_cpu];
-}
-
-/* Iterate thr' all leaf cfs_rq's on a runqueue */
-#define for_each_leaf_cfs_rq(rq, cfs_rq) \
-	list_for_each_entry_rcu(cfs_rq, &rq->leaf_cfs_rq_list, leaf_cfs_rq_list)
-
-/* Do the two (enqueued) entities belong to the same group ? */
-static inline int
-is_same_group(struct sched_entity *se, struct sched_entity *pse)
-{
-	if (se->cfs_rq == pse->cfs_rq)
-		return 1;
-
-	return 0;
-}
-
-static inline struct sched_entity *parent_entity(struct sched_entity *se)
-{
-	return se->parent;
-}
-
-#else	/* CONFIG_FAIR_GROUP_SCHED */
-
-#define for_each_sched_entity(se) \
-		for (; se; se = NULL)
-
-static inline struct cfs_rq *task_cfs_rq(struct task_struct *p)
-{
-	return &task_rq(p)->cfs;
-}
-
-static inline struct cfs_rq *cfs_rq_of(struct sched_entity *se)
-{
-	struct task_struct *p = task_of(se);
-	struct rq *rq = task_rq(p);
-
-	return &rq->cfs;
-}
-
-/* runqueue "owned" by this group */
-static inline struct cfs_rq *group_cfs_rq(struct sched_entity *grp)
-{
-	return NULL;
-}
-
-static inline struct cfs_rq *cpu_cfs_rq(struct cfs_rq *cfs_rq, int this_cpu)
-{
-	return &cpu_rq(this_cpu)->cfs;
-}
-
-#define for_each_leaf_cfs_rq(rq, cfs_rq) \
-		for (cfs_rq = &rq->cfs; cfs_rq; cfs_rq = NULL)
-
-static inline int
-is_same_group(struct sched_entity *se, struct sched_entity *pse)
-{
-	return 1;
-}
-
-static inline struct sched_entity *parent_entity(struct sched_entity *se)
-{
-	return NULL;
-}
-
-#endif	/* CONFIG_FAIR_GROUP_SCHED */
-
 #ifdef CONFIG_SCHED_HRTICK
 static void hrtick_start_fair(struct rq *rq, struct task_struct *p)
 {
@@ -916,7 +972,7 @@ static void yield_task_fair(struct rq *rq)
 	/*
 	 * Already in the rightmost position?
 	 */
-	if (unlikely(rightmost->vruntime < se->vruntime))
+	if (unlikely(!rightmost || rightmost->vruntime < se->vruntime))
 		return;
 
 	/*
@@ -955,7 +1011,9 @@ static int wake_idle(int cpu, struct task_struct *p)
 		return cpu;
 
 	for_each_domain(cpu, sd) {
-		if (sd->flags & SD_WAKE_IDLE) {
+		if ((sd->flags & SD_WAKE_IDLE)
+		    || ((sd->flags & SD_WAKE_IDLE_FAR)
+			&& !task_hot(p, task_rq(p)->clock, sd))) {
 			cpus_and(tmp, sd->span, p->cpus_allowed);
 			for_each_cpu_mask(i, tmp) {
 				if (idle_cpu(i)) {
@@ -1099,6 +1157,58 @@ out:
 }
 #endif /* CONFIG_SMP */
 
+static unsigned long wakeup_gran(struct sched_entity *se)
+{
+	unsigned long gran = sysctl_sched_wakeup_granularity;
+
+	/*
+	 * More easily preempt - nice tasks, while not making it harder for
+	 * + nice tasks.
+	 */
+	gran = calc_delta_asym(sysctl_sched_wakeup_granularity, se);
+
+	return gran;
+}
+
+/*
+ * Should 'se' preempt 'curr'.
+ *
+ *             |s1
+ *        |s2
+ *   |s3
+ *         g
+ *      |<--->|c
+ *
+ *  w(c, s1) = -1
+ *  w(c, s2) =  0
+ *  w(c, s3) =  1
+ *
+ */
+static int
+wakeup_preempt_entity(struct sched_entity *curr, struct sched_entity *se)
+{
+	s64 gran, vdiff = curr->vruntime - se->vruntime;
+
+	if (vdiff < 0)
+		return -1;
+
+	gran = wakeup_gran(curr);
+	if (vdiff > gran)
+		return 1;
+
+	return 0;
+}
+
+/* return depth at which a sched entity is present in the hierarchy */
+static inline int depth_se(struct sched_entity *se)
+{
+	int depth = 0;
+
+	for_each_sched_entity(se)
+		depth++;
+
+	return depth;
+}
 
 /*
  * Preempt the current task with a newly woken task if needed:
@@ -1108,7 +1218,7 @@ static void check_preempt_wakeup(struct rq *rq, struct task_struct *p)
 	struct task_struct *curr = rq->curr;
 	struct cfs_rq *cfs_rq = task_cfs_rq(curr);
 	struct sched_entity *se = &curr->se, *pse = &p->se;
-	unsigned long gran;
+	int se_depth, pse_depth;
 
 	if (unlikely(rt_prio(p->prio))) {
 		update_rq_clock(rq);
@@ -1133,20 +1243,33 @@ static void check_preempt_wakeup(struct rq *rq, struct task_struct *p)
 	if (!sched_feat(WAKEUP_PREEMPT))
 		return;
 
-	while (!is_same_group(se, pse)) {
+	/*
+	 * preemption test can be made between sibling entities who are in the
+	 * same cfs_rq i.e who have a common parent. Walk up the hierarchy of
+	 * both tasks until we find their ancestors who are siblings of common
+	 * parent.
+	 */
+
+	/* First walk up until both entities are at same depth */
+	se_depth = depth_se(se);
+	pse_depth = depth_se(pse);
+
+	while (se_depth > pse_depth) {
+		se_depth--;
 		se = parent_entity(se);
+	}
+
+	while (pse_depth > se_depth) {
+		pse_depth--;
 		pse = parent_entity(pse);
 	}
 
-	gran = sysctl_sched_wakeup_granularity;
-	/*
-	 * More easily preempt - nice tasks, while not making
-	 * it harder for + nice tasks.
-	 */
-	if (unlikely(se->load.weight > NICE_0_LOAD))
-		gran = calc_delta_fair(gran, &se->load);
+	while (!is_same_group(se, pse)) {
+		se = parent_entity(se);
+		pse = parent_entity(pse);
+	}
 
-	if (pse->vruntime + gran < se->vruntime)
+	if (wakeup_preempt_entity(se, pse) == 1)
 		resched_task(curr);
 }
 
@@ -1197,15 +1320,27 @@ static void put_prev_task_fair(struct rq *rq, struct task_struct *prev)
  * the current task:
  */
 static struct task_struct *
-__load_balance_iterator(struct cfs_rq *cfs_rq, struct rb_node *curr)
+__load_balance_iterator(struct cfs_rq *cfs_rq, struct list_head *next)
 {
-	struct task_struct *p;
+	struct task_struct *p = NULL;
+	struct sched_entity *se;
+
+	if (next == &cfs_rq->tasks)
+		return NULL;
+
+	/* Skip over entities that are not tasks */
+	do {
+		se = list_entry(next, struct sched_entity, group_node);
+		next = next->next;
+	} while (next != &cfs_rq->tasks && !entity_is_task(se));
 
-	if (!curr)
+	if (next == &cfs_rq->tasks)
 		return NULL;
 
-	p = rb_entry(curr, struct task_struct, se.run_node);
-	cfs_rq->rb_load_balance_curr = rb_next(curr);
+	cfs_rq->balance_iterator = next;
+
+	if (entity_is_task(se))
+		p = task_of(se);
 
 	return p;
 }
@@ -1214,85 +1349,100 @@ static struct task_struct *load_balance_start_fair(void *arg)
 {
 	struct cfs_rq *cfs_rq = arg;
 
-	return __load_balance_iterator(cfs_rq, first_fair(cfs_rq));
+	return __load_balance_iterator(cfs_rq, cfs_rq->tasks.next);
 }
 
 static struct task_struct *load_balance_next_fair(void *arg)
 {
 	struct cfs_rq *cfs_rq = arg;
 
-	return __load_balance_iterator(cfs_rq, cfs_rq->rb_load_balance_curr);
+	return __load_balance_iterator(cfs_rq, cfs_rq->balance_iterator);
 }
 
-#ifdef CONFIG_FAIR_GROUP_SCHED
-static int cfs_rq_best_prio(struct cfs_rq *cfs_rq)
+static unsigned long
+__load_balance_fair(struct rq *this_rq, int this_cpu, struct rq *busiest,
+		unsigned long max_load_move, struct sched_domain *sd,
+		enum cpu_idle_type idle, int *all_pinned, int *this_best_prio,
+		struct cfs_rq *cfs_rq)
 {
-	struct sched_entity *curr;
-	struct task_struct *p;
-
-	if (!cfs_rq->nr_running || !first_fair(cfs_rq))
-		return MAX_PRIO;
-
-	curr = cfs_rq->curr;
-	if (!curr)
-		curr = __pick_next_entity(cfs_rq);
+	struct rq_iterator cfs_rq_iterator;
 
-	p = task_of(curr);
+	cfs_rq_iterator.start = load_balance_start_fair;
+	cfs_rq_iterator.next = load_balance_next_fair;
+	cfs_rq_iterator.arg = cfs_rq;
 
-	return p->prio;
+	return balance_tasks(this_rq, this_cpu, busiest,
+			max_load_move, sd, idle, all_pinned,
+			this_best_prio, &cfs_rq_iterator);
 }
-#endif
 
+#ifdef CONFIG_FAIR_GROUP_SCHED
 static unsigned long
 load_balance_fair(struct rq *this_rq, int this_cpu, struct rq *busiest,
 		  unsigned long max_load_move,
 		  struct sched_domain *sd, enum cpu_idle_type idle,
 		  int *all_pinned, int *this_best_prio)
 {
-	struct cfs_rq *busy_cfs_rq;
 	long rem_load_move = max_load_move;
-	struct rq_iterator cfs_rq_iterator;
-
-	cfs_rq_iterator.start = load_balance_start_fair;
-	cfs_rq_iterator.next = load_balance_next_fair;
+	int busiest_cpu = cpu_of(busiest);
+	struct task_group *tg;
 
-	for_each_leaf_cfs_rq(busiest, busy_cfs_rq) {
-#ifdef CONFIG_FAIR_GROUP_SCHED
-		struct cfs_rq *this_cfs_rq;
+	rcu_read_lock();
+	list_for_each_entry(tg, &task_groups, list) {
 		long imbalance;
-		unsigned long maxload;
+		unsigned long this_weight, busiest_weight;
+		long rem_load, max_load, moved_load;
+
+		/*
+		 * empty group
+		 */
+		if (!aggregate(tg, sd)->task_weight)
+			continue;
+
+		rem_load = rem_load_move * aggregate(tg, sd)->rq_weight;
+		rem_load /= aggregate(tg, sd)->load + 1;
+
+		this_weight = tg->cfs_rq[this_cpu]->task_weight;
+		busiest_weight = tg->cfs_rq[busiest_cpu]->task_weight;
+
+		imbalance = (busiest_weight - this_weight) / 2;
 
-		this_cfs_rq = cpu_cfs_rq(busy_cfs_rq, this_cpu);
+		if (imbalance < 0)
+			imbalance = busiest_weight;
 
-		imbalance = busy_cfs_rq->load.weight - this_cfs_rq->load.weight;
-		/* Don't pull if this_cfs_rq has more load than busy_cfs_rq */
-		if (imbalance <= 0)
+		max_load = max(rem_load, imbalance);
+		moved_load = __load_balance_fair(this_rq, this_cpu, busiest,
+				max_load, sd, idle, all_pinned, this_best_prio,
+				tg->cfs_rq[busiest_cpu]);
+
+		if (!moved_load)
 			continue;
 
-		/* Don't pull more than imbalance/2 */
-		imbalance /= 2;
-		maxload = min(rem_load_move, imbalance);
+		move_group_shares(tg, sd, busiest_cpu, this_cpu);
 
-		*this_best_prio = cfs_rq_best_prio(this_cfs_rq);
-#else
-# define maxload rem_load_move
-#endif
-		/*
-		 * pass busy_cfs_rq argument into
-		 * load_balance_[start|next]_fair iterators
-		 */
-		cfs_rq_iterator.arg = busy_cfs_rq;
-		rem_load_move -= balance_tasks(this_rq, this_cpu, busiest,
-					       maxload, sd, idle, all_pinned,
-					       this_best_prio,
-					       &cfs_rq_iterator);
+		moved_load *= aggregate(tg, sd)->load;
+		moved_load /= aggregate(tg, sd)->rq_weight + 1;
 
-		if (rem_load_move <= 0)
+		rem_load_move -= moved_load;
+		if (rem_load_move < 0)
 			break;
 	}
+	rcu_read_unlock();
 
 	return max_load_move - rem_load_move;
 }
+#else
+static unsigned long
+load_balance_fair(struct rq *this_rq, int this_cpu, struct rq *busiest,
+		  unsigned long max_load_move,
+		  struct sched_domain *sd, enum cpu_idle_type idle,
+		  int *all_pinned, int *this_best_prio)
+{
+	return __load_balance_fair(this_rq, this_cpu, busiest,
+			max_load_move, sd, idle, all_pinned,
+			this_best_prio, &busiest->cfs);
+}
+#endif
 
 static int
 move_one_task_fair(struct rq *this_rq, int this_cpu, struct rq *busiest,
@@ -1461,16 +1611,40 @@ static const struct sched_class fair_sched_class = {
 };
 
 #ifdef CONFIG_SCHED_DEBUG
+static void
+print_cfs_rq_tasks(struct seq_file *m, struct cfs_rq *cfs_rq, int depth)
+{
+	struct sched_entity *se;
+
+	if (!cfs_rq)
+		return;
+
+	list_for_each_entry_rcu(se, &cfs_rq->tasks, group_node) {
+		int i;
+
+		for (i = depth; i; i--)
+			seq_puts(m, "  ");
+
+		seq_printf(m, "%lu %s %lu\n",
+				se->load.weight,
+				entity_is_task(se) ? "T" : "G",
+				calc_delta_weight(SCHED_LOAD_SCALE, se)
+				);
+		if (!entity_is_task(se))
+			print_cfs_rq_tasks(m, group_cfs_rq(se), depth + 1);
+	}
+}
+
 static void print_cfs_stats(struct seq_file *m, int cpu)
 {
 	struct cfs_rq *cfs_rq;
 
-#ifdef CONFIG_FAIR_GROUP_SCHED
-	print_cfs_rq(m, cpu, &cpu_rq(cpu)->cfs);
-#endif
 	rcu_read_lock();
 	for_each_leaf_cfs_rq(cpu_rq(cpu), cfs_rq)
 		print_cfs_rq(m, cpu, cfs_rq);
+
+	seq_printf(m, "\nWeight tree:\n");
+	print_cfs_rq_tasks(m, &cpu_rq(cpu)->cfs, 1);
 	rcu_read_unlock();
 }
 #endif
diff --git a/kernel/sched_features.h b/kernel/sched_features.h
new file mode 100644
index 0000000..1c7283c
--- /dev/null
+++ b/kernel/sched_features.h
@@ -0,0 +1,10 @@
+SCHED_FEAT(NEW_FAIR_SLEEPERS, 1)
+SCHED_FEAT(WAKEUP_PREEMPT, 1)
+SCHED_FEAT(START_DEBIT, 1)
+SCHED_FEAT(AFFINE_WAKEUPS, 1)
+SCHED_FEAT(CACHE_HOT_BUDDY, 1)
+SCHED_FEAT(SYNC_WAKEUPS, 1)
+SCHED_FEAT(HRTICK, 1)
+SCHED_FEAT(DOUBLE_TICK, 0)
+SCHED_FEAT(NORMALIZED_SLEEPER, 1)
+SCHED_FEAT(DEADLINE, 1)
diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index 0a6d2e5..c2730a5 100644
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -62,7 +62,12 @@ static inline u64 sched_rt_runtime(struct rt_rq *rt_rq)
 	if (!rt_rq->tg)
 		return RUNTIME_INF;
 
-	return rt_rq->tg->rt_runtime;
+	return rt_rq->rt_runtime;
+}
+
+static inline u64 sched_rt_period(struct rt_rq *rt_rq)
+{
+	return ktime_to_ns(rt_rq->tg->rt_bandwidth.rt_period);
 }
 
 #define for_each_leaf_rt_rq(rt_rq, rq) \
@@ -127,14 +132,39 @@ static int rt_se_boosted(struct sched_rt_entity *rt_se)
 	return p->prio != p->normal_prio;
 }
 
+#ifdef CONFIG_SMP
+static inline cpumask_t sched_rt_period_mask(void)
+{
+	return cpu_rq(smp_processor_id())->rd->span;
+}
+#else
+static inline cpumask_t sched_rt_period_mask(void)
+{
+	return cpu_online_map;
+}
+#endif
+
+static inline
+struct rt_rq *sched_rt_period_rt_rq(struct rt_bandwidth *rt_b, int cpu)
+{
+	return container_of(rt_b, struct task_group, rt_bandwidth)->rt_rq[cpu];
+}
+
+static inline struct rt_bandwidth *sched_rt_bandwidth(struct rt_rq *rt_rq)
+{
+	return &rt_rq->tg->rt_bandwidth;
+}
+
 #else
 
 static inline u64 sched_rt_runtime(struct rt_rq *rt_rq)
 {
-	if (sysctl_sched_rt_runtime == -1)
-		return RUNTIME_INF;
+	return rt_rq->rt_runtime;
+}
 
-	return (u64)sysctl_sched_rt_runtime * NSEC_PER_USEC;
+static inline u64 sched_rt_period(struct rt_rq *rt_rq)
+{
+	return ktime_to_ns(def_rt_bandwidth.rt_period);
 }
 
 #define for_each_leaf_rt_rq(rt_rq, rq) \
@@ -173,6 +203,102 @@ static inline int rt_rq_throttled(struct rt_rq *rt_rq)
 {
 	return rt_rq->rt_throttled;
 }
+
+static inline cpumask_t sched_rt_period_mask(void)
+{
+	return cpu_online_map;
+}
+
+static inline
+struct rt_rq *sched_rt_period_rt_rq(struct rt_bandwidth *rt_b, int cpu)
+{
+	return &cpu_rq(cpu)->rt;
+}
+
+static inline struct rt_bandwidth *sched_rt_bandwidth(struct rt_rq *rt_rq)
+{
+	return &def_rt_bandwidth;
+}
+
+#endif
+
+static int do_sched_rt_period_timer(struct rt_bandwidth *rt_b, int overrun)
+{
+	int i, idle = 1;
+	cpumask_t span;
+
+	if (rt_b->rt_runtime == RUNTIME_INF)
+		return 1;
+
+	span = sched_rt_period_mask();
+	for_each_cpu_mask(i, span) {
+		int enqueue = 0;
+		struct rt_rq *rt_rq = sched_rt_period_rt_rq(rt_b, i);
+		struct rq *rq = rq_of_rt_rq(rt_rq);
+
+		spin_lock(&rq->lock);
+		if (rt_rq->rt_time) {
+			u64 runtime;
+
+			spin_lock(&rt_rq->rt_runtime_lock);
+			runtime = rt_rq->rt_runtime;
+			rt_rq->rt_time -= min(rt_rq->rt_time, overrun*runtime);
+			if (rt_rq->rt_throttled && rt_rq->rt_time < runtime) {
+				rt_rq->rt_throttled = 0;
+				enqueue = 1;
+			}
+			if (rt_rq->rt_time || rt_rq->rt_nr_running)
+				idle = 0;
+			spin_unlock(&rt_rq->rt_runtime_lock);
+		}
+
+		if (enqueue)
+			sched_rt_rq_enqueue(rt_rq);
+		spin_unlock(&rq->lock);
+	}
+
+	return idle;
+}
+
+#ifdef CONFIG_SMP
+static int balance_runtime(struct rt_rq *rt_rq)
+{
+	struct rt_bandwidth *rt_b = sched_rt_bandwidth(rt_rq);
+	struct root_domain *rd = cpu_rq(smp_processor_id())->rd;
+	int i, weight, more = 0;
+	u64 rt_period;
+
+	weight = cpus_weight(rd->span);
+
+	spin_lock(&rt_b->rt_runtime_lock);
+	rt_period = ktime_to_ns(rt_b->rt_period);
+	for_each_cpu_mask(i, rd->span) {
+		struct rt_rq *iter = sched_rt_period_rt_rq(rt_b, i);
+		s64 diff;
+
+		if (iter == rt_rq)
+			continue;
+
+		spin_lock(&iter->rt_runtime_lock);
+		diff = iter->rt_runtime - iter->rt_time;
+		if (diff > 0) {
+			do_div(diff, weight);
+			if (rt_rq->rt_runtime + diff > rt_period)
+				diff = rt_period - rt_rq->rt_runtime;
+			iter->rt_runtime -= diff;
+			rt_rq->rt_runtime += diff;
+			more = 1;
+			if (rt_rq->rt_runtime == rt_period) {
+				spin_unlock(&iter->rt_runtime_lock);
+				break;
+			}
+		}
+		spin_unlock(&iter->rt_runtime_lock);
+	}
+	spin_unlock(&rt_b->rt_runtime_lock);
+
+	return more;
+}
 #endif
 
 static inline int rt_se_prio(struct sched_rt_entity *rt_se)
@@ -197,12 +323,24 @@ static int sched_rt_runtime_exceeded(struct rt_rq *rt_rq)
 	if (rt_rq->rt_throttled)
 		return rt_rq_throttled(rt_rq);
 
+	if (sched_rt_runtime(rt_rq) >= sched_rt_period(rt_rq))
+		return 0;
+
+#ifdef CONFIG_SMP
 	if (rt_rq->rt_time > runtime) {
-		struct rq *rq = rq_of_rt_rq(rt_rq);
+		int more;
 
-		rq->rt_throttled = 1;
-		rt_rq->rt_throttled = 1;
+		spin_unlock(&rt_rq->rt_runtime_lock);
+		more = balance_runtime(rt_rq);
+		spin_lock(&rt_rq->rt_runtime_lock);
 
+		if (more)
+			runtime = sched_rt_runtime(rt_rq);
+	}
+#endif
+
+	if (rt_rq->rt_time > runtime) {
+		rt_rq->rt_throttled = 1;
 		if (rt_rq_throttled(rt_rq)) {
 			sched_rt_rq_dequeue(rt_rq);
 			return 1;
@@ -212,29 +350,6 @@ static int sched_rt_runtime_exceeded(struct rt_rq *rt_rq)
 	return 0;
 }
 
-static void update_sched_rt_period(struct rq *rq)
-{
-	struct rt_rq *rt_rq;
-	u64 period;
-
-	while (rq->clock > rq->rt_period_expire) {
-		period = (u64)sysctl_sched_rt_period * NSEC_PER_USEC;
-		rq->rt_period_expire += period;
-
-		for_each_leaf_rt_rq(rt_rq, rq) {
-			u64 runtime = sched_rt_runtime(rt_rq);
-
-			rt_rq->rt_time -= min(rt_rq->rt_time, runtime);
-			if (rt_rq->rt_throttled && rt_rq->rt_time < runtime) {
-				rt_rq->rt_throttled = 0;
-				sched_rt_rq_enqueue(rt_rq);
-			}
-		}
-
-		rq->rt_throttled = 0;
-	}
-}
-
 /*
  * Update the current task's runtime statistics. Skip current tasks that
  * are not in our scheduling class.
@@ -259,9 +374,15 @@ static void update_curr_rt(struct rq *rq)
 	curr->se.exec_start = rq->clock;
 	cpuacct_charge(curr, delta_exec);
 
-	rt_rq->rt_time += delta_exec;
-	if (sched_rt_runtime_exceeded(rt_rq))
-		resched_task(curr);
+	for_each_sched_rt_entity(rt_se) {
+		rt_rq = rt_rq_of_se(rt_se);
+
+		spin_lock(&rt_rq->rt_runtime_lock);
+		rt_rq->rt_time += delta_exec;
+		if (sched_rt_runtime_exceeded(rt_rq))
+			resched_task(curr);
+		spin_unlock(&rt_rq->rt_runtime_lock);
+	}
 }
 
 static inline
@@ -284,6 +405,11 @@ void inc_rt_tasks(struct sched_rt_entity *rt_se, struct rt_rq *rt_rq)
 #ifdef CONFIG_RT_GROUP_SCHED
 	if (rt_se_boosted(rt_se))
 		rt_rq->rt_nr_boosted++;
+
+	if (rt_rq->tg)
+		start_rt_bandwidth(&rt_rq->tg->rt_bandwidth);
+#else
+	start_rt_bandwidth(&def_rt_bandwidth);
 #endif
 }
 
@@ -353,27 +479,21 @@ static void dequeue_rt_entity(struct sched_rt_entity *rt_se)
 /*
  * Because the prio of an upper entry depends on the lower
  * entries, we must remove entries top - down.
- *
- * XXX: O(1/2 h^2) because we can only walk up, not down the chain.
- *      doesn't matter much for now, as h=2 for GROUP_SCHED.
  */
 static void dequeue_rt_stack(struct task_struct *p)
 {
-	struct sched_rt_entity *rt_se, *top_se;
+	struct sched_rt_entity *rt_se, *back = NULL;
 
-	/*
-	 * dequeue all, top - down.
-	 */
-	do {
-		rt_se = &p->rt;
-		top_se = NULL;
-		for_each_sched_rt_entity(rt_se) {
-			if (on_rt_rq(rt_se))
-				top_se = rt_se;
-		}
-		if (top_se)
-			dequeue_rt_entity(top_se);
-	} while (top_se);
+	rt_se = &p->rt;
+	for_each_sched_rt_entity(rt_se) {
+		rt_se->back = back;
+		back = rt_se;
+	}
+
+	for (rt_se = back; rt_se; rt_se = rt_se->back) {
+		if (on_rt_rq(rt_se))
+			dequeue_rt_entity(rt_se);
+	}
 }
 
 /*
@@ -393,6 +513,8 @@ static void enqueue_task_rt(struct rq *rq, struct task_struct *p, int wakeup)
 	 */
 	for_each_sched_rt_entity(rt_se)
 		enqueue_rt_entity(rt_se);
+
+	inc_cpu_load(rq, p->se.load.weight);
 }
 
 static void dequeue_task_rt(struct rq *rq, struct task_struct *p, int sleep)
@@ -412,6 +534,8 @@ static void dequeue_task_rt(struct rq *rq, struct task_struct *p, int sleep)
 		if (rt_rq && rt_rq->rt_nr_running)
 			enqueue_rt_entity(rt_se);
 	}
+
+	dec_cpu_load(rq, p->se.load.weight);
 }
 
 /*
@@ -1001,7 +1125,8 @@ move_one_task_rt(struct rq *this_rq, int this_cpu, struct rq *busiest,
 	return 0;
 }
 
-static void set_cpus_allowed_rt(struct task_struct *p, cpumask_t *new_mask)
+static void set_cpus_allowed_rt(struct task_struct *p,
+				const cpumask_t *new_mask)
 {
 	int weight = cpus_weight(*new_mask);
 
diff --git a/kernel/sched_stats.h b/kernel/sched_stats.h
index 5b32433e..5bae2e0 100644
--- a/kernel/sched_stats.h
+++ b/kernel/sched_stats.h
@@ -9,6 +9,11 @@
 static int show_schedstat(struct seq_file *seq, void *v)
 {
 	int cpu;
+	int mask_len = NR_CPUS/32 * 9;
+	char *mask_str = kmalloc(mask_len, GFP_KERNEL);
+
+	if (mask_str == NULL)
+		return -ENOMEM;
 
 	seq_printf(seq, "version %d\n", SCHEDSTAT_VERSION);
 	seq_printf(seq, "timestamp %lu\n", jiffies);
@@ -36,9 +41,8 @@ static int show_schedstat(struct seq_file *seq, void *v)
 		preempt_disable();
 		for_each_domain(cpu, sd) {
 			enum cpu_idle_type itype;
-			char mask_str[NR_CPUS];
 
-			cpumask_scnprintf(mask_str, NR_CPUS, sd->span);
+			cpumask_scnprintf(mask_str, mask_len, sd->span);
 			seq_printf(seq, "domain%d %s", dcount++, mask_str);
 			for (itype = CPU_IDLE; itype < CPU_MAX_IDLE_TYPES;
 					itype++) {
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 31e9f2a..3c44956 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -356,7 +356,8 @@ void open_softirq(int nr, void (*action)(struct softirq_action*), void *data)
 /* Tasklets */
 struct tasklet_head
 {
-	struct tasklet_struct *list;
+	struct tasklet_struct *head;
+	struct tasklet_struct **tail;
 };
 
 /* Some compilers disobey section attribute on statics when not
@@ -369,8 +370,9 @@ void __tasklet_schedule(struct tasklet_struct *t)
 	unsigned long flags;
 
 	local_irq_save(flags);
-	t->next = __get_cpu_var(tasklet_vec).list;
-	__get_cpu_var(tasklet_vec).list = t;
+	t->next = NULL;
+	*__get_cpu_var(tasklet_vec).tail = t;
+	__get_cpu_var(tasklet_vec).tail = &(t->next);
 	raise_softirq_irqoff(TASKLET_SOFTIRQ);
 	local_irq_restore(flags);
 }
@@ -382,8 +384,9 @@ void __tasklet_hi_schedule(struct tasklet_struct *t)
 	unsigned long flags;
 
 	local_irq_save(flags);
-	t->next = __get_cpu_var(tasklet_hi_vec).list;
-	__get_cpu_var(tasklet_hi_vec).list = t;
+	t->next = NULL;
+	*__get_cpu_var(tasklet_hi_vec).tail = t;
+	__get_cpu_var(tasklet_hi_vec).tail = &(t->next);
 	raise_softirq_irqoff(HI_SOFTIRQ);
 	local_irq_restore(flags);
 }
@@ -395,8 +398,9 @@ static void tasklet_action(struct softirq_action *a)
 	struct tasklet_struct *list;
 
 	local_irq_disable();
-	list = __get_cpu_var(tasklet_vec).list;
-	__get_cpu_var(tasklet_vec).list = NULL;
+	list = __get_cpu_var(tasklet_vec).head;
+	__get_cpu_var(tasklet_vec).head = NULL;
+	__get_cpu_var(tasklet_vec).tail = &__get_cpu_var(tasklet_vec).head;
 	local_irq_enable();
 
 	while (list) {
@@ -416,8 +420,9 @@ static void tasklet_action(struct softirq_action *a)
 		}
 
 		local_irq_disable();
-		t->next = __get_cpu_var(tasklet_vec).list;
-		__get_cpu_var(tasklet_vec).list = t;
+		t->next = NULL;
+		*__get_cpu_var(tasklet_vec).tail = t;
+		__get_cpu_var(tasklet_vec).tail = &(t->next);
 		__raise_softirq_irqoff(TASKLET_SOFTIRQ);
 		local_irq_enable();
 	}
@@ -428,8 +433,9 @@ static void tasklet_hi_action(struct softirq_action *a)
 	struct tasklet_struct *list;
 
 	local_irq_disable();
-	list = __get_cpu_var(tasklet_hi_vec).list;
-	__get_cpu_var(tasklet_hi_vec).list = NULL;
+	list = __get_cpu_var(tasklet_hi_vec).head;
+	__get_cpu_var(tasklet_hi_vec).head = NULL;
+	__get_cpu_var(tasklet_hi_vec).tail = &__get_cpu_var(tasklet_hi_vec).head;
 	local_irq_enable();
 
 	while (list) {
@@ -449,8 +455,9 @@ static void tasklet_hi_action(struct softirq_action *a)
 		}
 
 		local_irq_disable();
-		t->next = __get_cpu_var(tasklet_hi_vec).list;
-		__get_cpu_var(tasklet_hi_vec).list = t;
+		t->next = NULL;
+		*__get_cpu_var(tasklet_hi_vec).tail = t;
+		__get_cpu_var(tasklet_hi_vec).tail = &(t->next);
 		__raise_softirq_irqoff(HI_SOFTIRQ);
 		local_irq_enable();
 	}
@@ -487,6 +494,15 @@ EXPORT_SYMBOL(tasklet_kill);
 
 void __init softirq_init(void)
 {
+	int cpu;
+
+	for_each_possible_cpu(cpu) {
+		per_cpu(tasklet_vec, cpu).tail =
+			&per_cpu(tasklet_vec, cpu).head;
+		per_cpu(tasklet_hi_vec, cpu).tail =
+			&per_cpu(tasklet_hi_vec, cpu).head;
+	}
+
 	open_softirq(TASKLET_SOFTIRQ, tasklet_action, NULL);
 	open_softirq(HI_SOFTIRQ, tasklet_hi_action, NULL);
 }
@@ -555,9 +571,12 @@ void tasklet_kill_immediate(struct tasklet_struct *t, unsigned int cpu)
 		return;
 
 	/* CPU is dead, so no lock needed. */
-	for (i = &per_cpu(tasklet_vec, cpu).list; *i; i = &(*i)->next) {
+	for (i = &per_cpu(tasklet_vec, cpu).head; *i; i = &(*i)->next) {
 		if (*i == t) {
 			*i = t->next;
+			/* If this was the tail element, move the tail ptr */
+			if (*i == NULL)
+				per_cpu(tasklet_vec, cpu).tail = i;
 			return;
 		}
 	}
@@ -566,20 +585,20 @@ void tasklet_kill_immediate(struct tasklet_struct *t, unsigned int cpu)
 
 static void takeover_tasklets(unsigned int cpu)
 {
-	struct tasklet_struct **i;
-
 	/* CPU is dead, so no lock needed. */
 	local_irq_disable();
 
 	/* Find end, append list for that CPU. */
-	for (i = &__get_cpu_var(tasklet_vec).list; *i; i = &(*i)->next);
-	*i = per_cpu(tasklet_vec, cpu).list;
-	per_cpu(tasklet_vec, cpu).list = NULL;
+	*__get_cpu_var(tasklet_vec).tail = per_cpu(tasklet_vec, cpu).head;
+	__get_cpu_var(tasklet_vec).tail = per_cpu(tasklet_vec, cpu).tail;
+	per_cpu(tasklet_vec, cpu).head = NULL;
+	per_cpu(tasklet_vec, cpu).tail = &per_cpu(tasklet_vec, cpu).head;
 	raise_softirq_irqoff(TASKLET_SOFTIRQ);
 
-	for (i = &__get_cpu_var(tasklet_hi_vec).list; *i; i = &(*i)->next);
-	*i = per_cpu(tasklet_hi_vec, cpu).list;
-	per_cpu(tasklet_hi_vec, cpu).list = NULL;
+	*__get_cpu_var(tasklet_hi_vec).tail = per_cpu(tasklet_hi_vec, cpu).head;
+	__get_cpu_var(tasklet_hi_vec).tail = per_cpu(tasklet_hi_vec, cpu).tail;
+	per_cpu(tasklet_hi_vec, cpu).head = NULL;
+	per_cpu(tasklet_hi_vec, cpu).tail = &per_cpu(tasklet_hi_vec, cpu).head;
 	raise_softirq_irqoff(HI_SOFTIRQ);
 
 	local_irq_enable();
diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c
index 6f4e0e1..e1b2a5b 100644
--- a/kernel/stop_machine.c
+++ b/kernel/stop_machine.c
@@ -35,7 +35,7 @@ static int stopmachine(void *cpu)
 	int irqs_disabled = 0;
 	int prepared = 0;
 
-	set_cpus_allowed(current, cpumask_of_cpu((int)(long)cpu));
+	set_cpus_allowed_ptr(current, &cpumask_of_cpu((int)(long)cpu));
 
 	/* Ack: we are alive */
 	smp_mb(); /* Theoretically the ack = 0 might not be on this CPU yet. */
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index b2a2d68..fd33648 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -270,17 +270,6 @@ static struct ctl_table kern_table[] = {
 	},
 	{
 		.ctl_name	= CTL_UNNUMBERED,
-		.procname	= "sched_batch_wakeup_granularity_ns",
-		.data		= &sysctl_sched_batch_wakeup_granularity,
-		.maxlen		= sizeof(unsigned int),
-		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_minmax,
-		.strategy	= &sysctl_intvec,
-		.extra1		= &min_wakeup_granularity_ns,
-		.extra2		= &max_wakeup_granularity_ns,
-	},
-	{
-		.ctl_name	= CTL_UNNUMBERED,
 		.procname	= "sched_child_runs_first",
 		.data		= &sysctl_sched_child_runs_first,
 		.maxlen		= sizeof(unsigned int),
@@ -318,7 +307,7 @@ static struct ctl_table kern_table[] = {
 		.data		= &sysctl_sched_rt_period,
 		.maxlen		= sizeof(unsigned int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= &sched_rt_handler,
 	},
 	{
 		.ctl_name	= CTL_UNNUMBERED,
@@ -326,7 +315,7 @@ static struct ctl_table kern_table[] = {
 		.data		= &sysctl_sched_rt_runtime,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= &proc_dointvec,
+		.proc_handler	= &sched_rt_handler,
 	},
 	{
 		.ctl_name	= CTL_UNNUMBERED,
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 69dba0c..d358d4e 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -191,7 +191,6 @@ u64 get_cpu_idle_time_us(int cpu, u64 *last_update_time)
 void tick_nohz_stop_sched_tick(void)
 {
 	unsigned long seq, last_jiffies, next_jiffies, delta_jiffies, flags;
-	unsigned long rt_jiffies;
 	struct tick_sched *ts;
 	ktime_t last_update, expires, now;
 	struct clock_event_device *dev = __get_cpu_var(tick_cpu_device).evtdev;
@@ -243,10 +242,6 @@ void tick_nohz_stop_sched_tick(void)
 	next_jiffies = get_next_timer_interrupt(last_jiffies);
 	delta_jiffies = next_jiffies - last_jiffies;
 
-	rt_jiffies = rt_needs_cpu(cpu);
-	if (rt_jiffies && rt_jiffies < delta_jiffies)
-		delta_jiffies = rt_jiffies;
-
 	if (rcu_needs_cpu(cpu))
 		delta_jiffies = 1;
 	/*
diff --git a/kernel/user.c b/kernel/user.c
index 7132022..debce60 100644
--- a/kernel/user.c
+++ b/kernel/user.c
@@ -101,7 +101,7 @@ static int sched_create_user(struct user_struct *up)
 {
 	int rc = 0;
 
-	up->tg = sched_create_group();
+	up->tg = sched_create_group(&root_task_group);
 	if (IS_ERR(up->tg))
 		rc = -ENOMEM;
 
@@ -193,6 +193,33 @@ static ssize_t cpu_rt_runtime_store(struct kobject *kobj,
 
 static struct kobj_attribute cpu_rt_runtime_attr =
 	__ATTR(cpu_rt_runtime, 0644, cpu_rt_runtime_show, cpu_rt_runtime_store);
+
+static ssize_t cpu_rt_period_show(struct kobject *kobj,
+				   struct kobj_attribute *attr,
+				   char *buf)
+{
+	struct user_struct *up = container_of(kobj, struct user_struct, kobj);
+
+	return sprintf(buf, "%lu\n", sched_group_rt_period(up->tg));
+}
+
+static ssize_t cpu_rt_period_store(struct kobject *kobj,
+				    struct kobj_attribute *attr,
+				    const char *buf, size_t size)
+{
+	struct user_struct *up = container_of(kobj, struct user_struct, kobj);
+	unsigned long rt_period;
+	int rc;
+
+	sscanf(buf, "%lu", &rt_period);
+
+	rc = sched_group_set_rt_period(up->tg, rt_period);
+
+	return (rc ? rc : size);
+}
+
+static struct kobj_attribute cpu_rt_period_attr =
+	__ATTR(cpu_rt_period, 0644, cpu_rt_period_show, cpu_rt_period_store);
 #endif
 
 /* default attributes per uid directory */
@@ -202,6 +229,7 @@ static struct attribute *uids_attributes[] = {
 #endif
 #ifdef CONFIG_RT_GROUP_SCHED
 	&cpu_rt_runtime_attr.attr,
+	&cpu_rt_period_attr.attr,
 #endif
 	NULL
 };