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| author | Paul E. McKenney <paul.mckenney@linaro.org> | 2011-03-29 17:48:28 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2011-05-05 23:16:56 -0700 |
| commit | d71df90eadfc35aa549ff9a850842673febca71f (patch) | |
| tree | dd275a3f4848784bc6625574341c11befc1b3823 /kernel/rcutree.h | |
| parent | 0ac3d136b2e3cdf1161178223bc5da14a06241d0 (diff) | |
| download | linux-d71df90eadfc35aa549ff9a850842673febca71f.tar.bz2 | |
rcu: add tracing for RCU's kthread run states.
Add tracing to help debugging situations when RCU's kthreads are not
running but are supposed to be.
Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'kernel/rcutree.h')
| -rw-r--r-- | kernel/rcutree.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/kernel/rcutree.h b/kernel/rcutree.h index d49046c79c59..67341dbebd95 100644 --- 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; /* |