Implement real-time aux threads. G-EDF only.

1 files changed, 20 insertions, 4 deletions

diff --git a/kernel/sched.c b/kernel/sched.c
index 9e8d8698323b..0e4b3d40cd29 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -2703,8 +2703,10 @@ try_to_wake_up(struct task_struct *p, unsigned int state, int wake_flags)
         unsigned long flags;
         int cpu, success = 0;
 
-        if (is_realtime(p))
+        if (is_realtime(p)) {
+                //WARN_ON(1);
                 TRACE_TASK(p, "try_to_wake_up() state:%d\n", p->state);
+        }
 
         smp_wmb();
         raw_spin_lock_irqsave(&p->pi_lock, flags);
@@ -3169,6 +3171,12 @@ asmlinkage void schedule_tail(struct task_struct *prev)
 {
         struct rq *rq = this_rq();
 
+        sched_trace_task_switch_to(current);
+
+        if (sched_state_validate_switch()) {
+                WARN_ON(1);
+        }
+
         finish_task_switch(rq, prev);
 
         /*
@@ -4416,8 +4424,16 @@ litmus_need_resched_nonpreemptible:
 
         post_schedule(rq);
 
-        if (sched_state_validate_switch())
+        if (sched_state_validate_switch()) {
+                TRACE_CUR("cpu %d: have to redo scheduling decision!\n", cpu);
                 goto litmus_need_resched_nonpreemptible;
+        }
+        else if (current->policy == SCHED_LITMUS) {
+                TRACE_CUR("cpu %d: valid switch to rt task %s/%d.\n", cpu, current->comm, current->pid);
+        }
+        else {
+//              TRACE_CUR("cpu %d: switch: %s/%d\n", cpu, current->comm, current->pid);
+        }
 
         preempt_enable_no_resched();
 
@@ -4430,8 +4446,8 @@ litmus_need_resched_nonpreemptible:
 
 #ifdef CONFIG_LITMUS_PAI_SOFTIRQD
         litmus->run_tasklets(prev);
-#endif  
-        
+#endif
+
         srp_ceiling_block();
 }
 EXPORT_SYMBOL(schedule);