sched_rt: don't start timer when rt bandwidth disabled

[safe/jmp/linux-2.6] / kernel / sched_stats.h

diff --git a/kernel/sched_stats.h b/kernel/sched_stats.h
index f2773b5..a8f93dd 100644 (file)
--- a/kernel/sched_stats.h
+++ b/kernel/sched_stats.h
@@ -296,20 +296,21 @@ sched_info_switch(struct task_struct *prev, struct task_struct *next)
 static inline void account_group_user_time(struct task_struct *tsk,
                                           cputime_t cputime)
 {
-       struct signal_struct *sig;
+       struct thread_group_cputimer *cputimer;
 
        /* tsk == current, ensure it is safe to use ->signal */
        if (unlikely(tsk->exit_state))
                return;
 
-       sig = tsk->signal;
-       if (sig->cputime.totals) {
-               struct task_cputime *times;
+       cputimer = &tsk->signal->cputimer;
 
-               times = per_cpu_ptr(sig->cputime.totals, get_cpu());
-               times->utime = cputime_add(times->utime, cputime);
-               put_cpu_no_resched();
-       }
+       if (!cputimer->running)
+               return;
+
+       spin_lock(&cputimer->lock);
+       cputimer->cputime.utime =
+               cputime_add(cputimer->cputime.utime, cputime);
+       spin_unlock(&cputimer->lock);
 }
 
 /**
@@ -325,20 +326,21 @@ static inline void account_group_user_time(struct task_struct *tsk,
 static inline void account_group_system_time(struct task_struct *tsk,
                                             cputime_t cputime)
 {
-       struct signal_struct *sig;
+       struct thread_group_cputimer *cputimer;
 
        /* tsk == current, ensure it is safe to use ->signal */
        if (unlikely(tsk->exit_state))
                return;
 
-       sig = tsk->signal;
-       if (sig->cputime.totals) {
-               struct task_cputime *times;
+       cputimer = &tsk->signal->cputimer;
 
-               times = per_cpu_ptr(sig->cputime.totals, get_cpu());
-               times->stime = cputime_add(times->stime, cputime);
-               put_cpu_no_resched();
-       }
+       if (!cputimer->running)
+               return;
+
+       spin_lock(&cputimer->lock);
+       cputimer->cputime.stime =
+               cputime_add(cputimer->cputime.stime, cputime);
+       spin_unlock(&cputimer->lock);
 }
 
 /**
@@ -354,6 +356,7 @@ static inline void account_group_system_time(struct task_struct *tsk,
 static inline void account_group_exec_runtime(struct task_struct *tsk,
                                              unsigned long long ns)
 {
+       struct thread_group_cputimer *cputimer;
        struct signal_struct *sig;
 
        sig = tsk->signal;
@@ -362,11 +365,12 @@ static inline void account_group_exec_runtime(struct task_struct *tsk,
        if (unlikely(!sig))
                return;
 
-       if (sig->cputime.totals) {
-               struct task_cputime *times;
+       cputimer = &sig->cputimer;
 
-               times = per_cpu_ptr(sig->cputime.totals, get_cpu());
-               times->sum_exec_runtime += ns;
-               put_cpu_no_resched();
-       }
+       if (!cputimer->running)
+               return;
+
+       spin_lock(&cputimer->lock);
+       cputimer->cputime.sum_exec_runtime += ns;
+       spin_unlock(&cputimer->lock);
 }