Merge commit 'v2.6.31-rc6' into core/rcu

[safe/jmp/linux-2.6] / kernel / sched.c

diff --git a/kernel/sched.c b/kernel/sched.c
index 9ae80be..cda8b81 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -493,6 +493,7 @@ struct rt_rq {
 #endif
 #ifdef CONFIG_SMP
        unsigned long rt_nr_migratory;
+       unsigned long rt_nr_total;
        int overloaded;
        struct plist_head pushable_tasks;
 #endif
@@ -2571,15 +2572,37 @@ static void __sched_fork(struct task_struct *p)
        p->se.avg_wakeup                = sysctl_sched_wakeup_granularity;
 
 #ifdef CONFIG_SCHEDSTATS
-       p->se.wait_start                = 0;
-       p->se.sum_sleep_runtime         = 0;
-       p->se.sleep_start               = 0;
-       p->se.block_start               = 0;
-       p->se.sleep_max                 = 0;
-       p->se.block_max                 = 0;
-       p->se.exec_max                  = 0;
-       p->se.slice_max                 = 0;
-       p->se.wait_max                  = 0;
+       p->se.wait_start                        = 0;
+       p->se.wait_max                          = 0;
+       p->se.wait_count                        = 0;
+       p->se.wait_sum                          = 0;
+
+       p->se.sleep_start                       = 0;
+       p->se.sleep_max                         = 0;
+       p->se.sum_sleep_runtime                 = 0;
+
+       p->se.block_start                       = 0;
+       p->se.block_max                         = 0;
+       p->se.exec_max                          = 0;
+       p->se.slice_max                         = 0;
+
+       p->se.nr_migrations_cold                = 0;
+       p->se.nr_failed_migrations_affine       = 0;
+       p->se.nr_failed_migrations_running      = 0;
+       p->se.nr_failed_migrations_hot          = 0;
+       p->se.nr_forced_migrations              = 0;
+       p->se.nr_forced2_migrations             = 0;
+
+       p->se.nr_wakeups                        = 0;
+       p->se.nr_wakeups_sync                   = 0;
+       p->se.nr_wakeups_migrate                = 0;
+       p->se.nr_wakeups_local                  = 0;
+       p->se.nr_wakeups_remote                 = 0;
+       p->se.nr_wakeups_affine                 = 0;
+       p->se.nr_wakeups_affine_attempts        = 0;
+       p->se.nr_wakeups_passive                = 0;
+       p->se.nr_wakeups_idle                   = 0;
+
 #endif
 
        INIT_LIST_HEAD(&p->rt.run_list);
@@ -6541,6 +6564,11 @@ SYSCALL_DEFINE0(sched_yield)
        return 0;
 }
 
+static inline int should_resched(void)
+{
+       return need_resched() && !(preempt_count() & PREEMPT_ACTIVE);
+}
+
 static void __cond_resched(void)
 {
 #ifdef CONFIG_DEBUG_SPINLOCK_SLEEP
@@ -6560,8 +6588,7 @@ static void __cond_resched(void)
 
 int __sched _cond_resched(void)
 {
-       if (need_resched() && !(preempt_count() & PREEMPT_ACTIVE) &&
-                                       system_state == SYSTEM_RUNNING) {
+       if (should_resched()) {
                __cond_resched();
                return 1;
        }
@@ -6579,12 +6606,12 @@ EXPORT_SYMBOL(_cond_resched);
  */
 int cond_resched_lock(spinlock_t *lock)
 {
-       int resched = need_resched() && system_state == SYSTEM_RUNNING;
+       int resched = should_resched();
        int ret = 0;
 
        if (spin_needbreak(lock) || resched) {
                spin_unlock(lock);
-               if (resched && need_resched())
+               if (resched)
                        __cond_resched();
                else
                        cpu_relax();
@@ -6599,7 +6626,7 @@ int __sched cond_resched_softirq(void)
 {
        BUG_ON(!in_softirq());
 
-       if (need_resched() && system_state == SYSTEM_RUNNING) {
+       if (should_resched()) {
                local_bh_enable();
                __cond_resched();
                local_bh_disable();
@@ -7277,6 +7304,7 @@ static void migrate_dead_tasks(unsigned int dead_cpu)
 static void calc_global_load_remove(struct rq *rq)
 {
        atomic_long_sub(rq->calc_load_active, &calc_load_tasks);
+       rq->calc_load_active = 0;
 }
 #endif /* CONFIG_HOTPLUG_CPU */
 
@@ -7503,6 +7531,7 @@ migration_call(struct notifier_block *nfb, unsigned long action, void *hcpu)
                task_rq_unlock(rq, &flags);
                get_task_struct(p);
                cpu_rq(cpu)->migration_thread = p;
+               rq->calc_load_update = calc_load_update;
                break;
 
        case CPU_ONLINE:
@@ -7513,8 +7542,6 @@ migration_call(struct notifier_block *nfb, unsigned long action, void *hcpu)
                /* Update our root-domain */
                rq = cpu_rq(cpu);
                spin_lock_irqsave(&rq->lock, flags);
-               rq->calc_load_update = calc_load_update;
-               rq->calc_load_active = 0;
                if (rq->rd) {
                        BUG_ON(!cpumask_test_cpu(cpu, rq->rd->span));
 
@@ -9085,7 +9112,7 @@ static void init_rt_rq(struct rt_rq *rt_rq, struct rq *rq)
 #ifdef CONFIG_SMP
        rt_rq->rt_nr_migratory = 0;
        rt_rq->overloaded = 0;
-       plist_head_init(&rq->rt.pushable_tasks, &rq->lock);
+       plist_head_init(&rt_rq->pushable_tasks, &rq->lock);
 #endif
 
        rt_rq->rt_time = 0;