rcu: add tracing for RCU's kthread run states.

[pandora-kernel.git] / kernel / rcutree.h

diff --git a/kernel/rcutree.h b/kernel/rcutree.h
index d49046c..67341db 100644 (file)
--- a/kernel/rcutree.h
+++ b/kernel/rcutree.h
@@ -89,6 +89,13 @@ struct rcu_dynticks {
        atomic_t dynticks;      /* Even value for dynticks-idle, else odd. */
 };
 
+/* RCU's kthread states for tracing. */
+#define RCU_KTHREAD_STOPPED  0
+#define RCU_KTHREAD_RUNNING  1
+#define RCU_KTHREAD_WAITING  2
+#define RCU_KTHREAD_YIELDING 3
+#define RCU_KTHREAD_MAX      3
+
 /*
  * Definition for node within the RCU grace-period-detection hierarchy.
  */
@@ -152,6 +159,8 @@ struct rcu_node {
        wait_queue_head_t boost_wq;
                                /* Wait queue on which to park the boost */
                                /*  kthread. */
+       unsigned int boost_kthread_status;
+                               /* State of boost_kthread_task for tracing. */
        unsigned long n_tasks_boosted;
                                /* Total number of tasks boosted. */
        unsigned long n_exp_boosts;
@@ -179,6 +188,8 @@ struct rcu_node {
        wait_queue_head_t node_wq;
                                /* Wait queue on which to park the per-node */
                                /*  kthread. */
+       unsigned int node_kthread_status;
+                               /* State of node_kthread_task for tracing. */
 } ____cacheline_internodealigned_in_smp;
 
 /*