rcu: Add more information to the wrong-idle-task complaint
[linux-2.6.git] / kernel / rcutiny.c
index 9b9bdf6..6d70ff7 100644 (file)
@@ -65,10 +65,14 @@ static void rcu_idle_enter_common(long long oldval)
        }
        RCU_TRACE(trace_rcu_dyntick("Start", oldval, rcu_dynticks_nesting));
        if (!idle_cpu(smp_processor_id())) {
-               WARN_ON_ONCE(1);        /* must be idle task! */
+               struct task_struct *idle = idle_task(smp_processor_id());
+
                RCU_TRACE(trace_rcu_dyntick("Error on entry: not idle task",
                                            oldval, rcu_dynticks_nesting));
                ftrace_dump(DUMP_ALL);
+               WARN_ONCE(1, "Current pid: %d comm: %s / Idle pid: %d comm: %s",
+                         current->pid, current->comm,
+                         idle->pid, idle->comm); /* must be idle task! */
        }
        rcu_sched_qs(0); /* implies rcu_bh_qsctr_inc(0) */
 }
@@ -115,10 +119,14 @@ static void rcu_idle_exit_common(long long oldval)
        }
        RCU_TRACE(trace_rcu_dyntick("End", oldval, rcu_dynticks_nesting));
        if (!idle_cpu(smp_processor_id())) {
-               WARN_ON_ONCE(1);        /* must be idle task! */
+               struct task_struct *idle = idle_task(smp_processor_id());
+
                RCU_TRACE(trace_rcu_dyntick("Error on exit: not idle task",
                          oldval, rcu_dynticks_nesting));
                ftrace_dump(DUMP_ALL);
+               WARN_ONCE(1, "Current pid: %d comm: %s / Idle pid: %d comm: %s",
+                         current->pid, current->comm,
+                         idle->pid, idle->comm); /* must be idle task! */
        }
 }