Merge git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-s…

…ched

* git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched:
  sched debug: dont print kernel address in /proc/sched_debug
  sched: fix typo in the FAIR_GROUP_SCHED branch
  sched: improve rq-clock overflow logic

kernel/sched.c

@@ -263,6 +263,7 @@ struct rq {
 
 	unsigned int clock_warps, clock_overflows;
 	unsigned int clock_unstable_events;
+	u64 tick_timestamp;
 
 	atomic_t nr_iowait;
 
@@ -341,8 +342,11 @@ static void __update_rq_clock(struct rq *rq)
 		/*
 		 * Catch too large forward jumps too:
 		 */
-		if (unlikely(delta > 2*TICK_NSEC)) {
-			clock++;
+		if (unlikely(clock + delta > rq->tick_timestamp + TICK_NSEC)) {
+			if (clock < rq->tick_timestamp + TICK_NSEC)
+				clock = rq->tick_timestamp + TICK_NSEC;
+			else
+				clock++;
 			rq->clock_overflows++;
 		} else {
 			if (unlikely(delta > rq->clock_max_delta))
@@ -3308,9 +3312,16 @@ void scheduler_tick(void)
 	int cpu = smp_processor_id();
 	struct rq *rq = cpu_rq(cpu);
 	struct task_struct *curr = rq->curr;
+	u64 next_tick = rq->tick_timestamp + TICK_NSEC;
 
 	spin_lock(&rq->lock);
 	__update_rq_clock(rq);
+	/*
+	 * Let rq->clock advance by at least TICK_NSEC:
+	 */
+	if (unlikely(rq->clock < next_tick))
+		rq->clock = next_tick;
+	rq->tick_timestamp = rq->clock;
 	update_cpu_load(rq);
 	if (curr != rq->idle) /* FIXME: needed? */
 		curr->sched_class->task_tick(rq, curr);

kernel/sched_debug.c

@@ -108,7 +108,7 @@ print_cfs_rq_runtime_sum(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
 
 void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
 {
-	SEQ_printf(m, "\ncfs_rq %p\n", cfs_rq);
+	SEQ_printf(m, "\ncfs_rq\n");
 
 #define P(x) \
 	SEQ_printf(m, "  .%-30s: %Ld\n", #x, (long long)(cfs_rq->x))

kernel/sched_fair.c

@@ -959,13 +959,12 @@ load_balance_fair(struct rq *this_rq, int this_cpu, struct rq *busiest,
 	for_each_leaf_cfs_rq(busiest, busy_cfs_rq) {
 #ifdef CONFIG_FAIR_GROUP_SCHED
 		struct cfs_rq *this_cfs_rq;
-		long imbalances;
+		long imbalance;
 		unsigned long maxload;
 
 		this_cfs_rq = cpu_cfs_rq(busy_cfs_rq, this_cpu);
 
-		imbalance = busy_cfs_rq->load.weight -
-						 this_cfs_rq->load.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)
 			continue;
@@ -976,7 +975,7 @@ load_balance_fair(struct rq *this_rq, int this_cpu, struct rq *busiest,
 
 		*this_best_prio = cfs_rq_best_prio(this_cfs_rq);
 #else
-#define maxload rem_load_move
+# define maxload rem_load_move
 #endif
 		/* pass busy_cfs_rq argument into
 		 * load_balance_[start|next]_fair iterators