rcu: Fix grace-period-stall bug on large systems with CPU hotplug

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

diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index 3d4020a..a4d790c 100644 (file)
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -615,6 +615,8 @@ static void update_curr_rt(struct rq *rq)
        curr->se.exec_start = rq->clock;
        cpuacct_charge(curr, delta_exec);
 
+       sched_rt_avg_update(rq, delta_exec);
+
        if (!rt_bandwidth_enabled())
                return;
 
@@ -887,8 +889,6 @@ static void enqueue_task_rt(struct rq *rq, struct task_struct *p, int wakeup)
 
        if (!task_current(rq, p) && p->rt.nr_cpus_allowed > 1)
                enqueue_pushable_task(rq, p);
-
-       inc_cpu_load(rq, p->se.load.weight);
 }
 
 static void dequeue_task_rt(struct rq *rq, struct task_struct *p, int sleep)
@@ -899,8 +899,6 @@ static void dequeue_task_rt(struct rq *rq, struct task_struct *p, int sleep)
        dequeue_rt_entity(rt_se);
 
        dequeue_pushable_task(rq, p);
-
-       dec_cpu_load(rq, p->se.load.weight);
 }
 
 /*
@@ -940,10 +938,13 @@ static void yield_task_rt(struct rq *rq)
 #ifdef CONFIG_SMP
 static int find_lowest_rq(struct task_struct *task);
 
-static int select_task_rq_rt(struct task_struct *p, int sync)
+static int select_task_rq_rt(struct task_struct *p, int sd_flag, int flags)
 {
        struct rq *rq = task_rq(p);
 
+       if (sd_flag != SD_BALANCE_WAKE)
+               return smp_processor_id();
+
        /*
         * If the current task is an RT task, then
         * try to see if we can wake this RT task up on another
@@ -1001,7 +1002,7 @@ static void check_preempt_equal_prio(struct rq *rq, struct task_struct *p)
 /*
  * Preempt the current task with a newly woken task if needed:
  */
-static void check_preempt_curr_rt(struct rq *rq, struct task_struct *p, int sync)
+static void check_preempt_curr_rt(struct rq *rq, struct task_struct *p, int flags)
 {
        if (p->prio < rq->curr->prio) {
                resched_task(rq->curr);
@@ -1733,6 +1734,17 @@ static void set_curr_task_rt(struct rq *rq)
        dequeue_pushable_task(rq, p);
 }
 
+unsigned int get_rr_interval_rt(struct task_struct *task)
+{
+       /*
+        * Time slice is 0 for SCHED_FIFO tasks
+        */
+       if (task->policy == SCHED_RR)
+               return DEF_TIMESLICE;
+       else
+               return 0;
+}
+
 static const struct sched_class rt_sched_class = {
        .next                   = &fair_sched_class,
        .enqueue_task           = enqueue_task_rt,
@@ -1761,6 +1773,8 @@ static const struct sched_class rt_sched_class = {
        .set_curr_task          = set_curr_task_rt,
        .task_tick              = task_tick_rt,
 
+       .get_rr_interval        = get_rr_interval_rt,
+
        .prio_changed           = prio_changed_rt,
        .switched_to            = switched_to_rt,
 };