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-rw-r--r--net/sunrpc/sched.c73
1 files changed, 57 insertions, 16 deletions
diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c
index 3341d896278..994cfea2bad 100644
--- a/net/sunrpc/sched.c
+++ b/net/sunrpc/sched.c
@@ -28,6 +28,9 @@
#define RPCDBG_FACILITY RPCDBG_SCHED
#endif
+#define CREATE_TRACE_POINTS
+#include <trace/events/sunrpc.h>
+
/*
* RPC slabs and memory pools
*/
@@ -205,9 +208,7 @@ static void __rpc_init_priority_wait_queue(struct rpc_wait_queue *queue, const c
queue->qlen = 0;
setup_timer(&queue->timer_list.timer, __rpc_queue_timer_fn, (unsigned long)queue);
INIT_LIST_HEAD(&queue->timer_list.list);
-#ifdef RPC_DEBUG
- queue->name = qname;
-#endif
+ rpc_assign_waitqueue_name(queue, qname);
}
void rpc_init_priority_wait_queue(struct rpc_wait_queue *queue, const char *qname)
@@ -251,6 +252,8 @@ static inline void rpc_task_set_debuginfo(struct rpc_task *task)
static void rpc_set_active(struct rpc_task *task)
{
+ trace_rpc_task_begin(task->tk_client, task, NULL);
+
rpc_task_set_debuginfo(task);
set_bit(RPC_TASK_ACTIVE, &task->tk_runstate);
}
@@ -267,6 +270,8 @@ static int rpc_complete_task(struct rpc_task *task)
unsigned long flags;
int ret;
+ trace_rpc_task_complete(task->tk_client, task, NULL);
+
spin_lock_irqsave(&wq->lock, flags);
clear_bit(RPC_TASK_ACTIVE, &task->tk_runstate);
ret = atomic_dec_and_test(&task->tk_count);
@@ -324,6 +329,8 @@ static void __rpc_sleep_on_priority(struct rpc_wait_queue *q,
dprintk("RPC: %5u sleep_on(queue \"%s\" time %lu)\n",
task->tk_pid, rpc_qname(q), jiffies);
+ trace_rpc_task_sleep(task->tk_client, task, q);
+
__rpc_add_wait_queue(q, task, queue_priority);
BUG_ON(task->tk_callback != NULL);
@@ -378,6 +385,8 @@ static void __rpc_do_wake_up_task(struct rpc_wait_queue *queue, struct rpc_task
return;
}
+ trace_rpc_task_wakeup(task->tk_client, task, queue);
+
__rpc_remove_wait_queue(queue, task);
rpc_make_runnable(task);
@@ -422,7 +431,7 @@ EXPORT_SYMBOL_GPL(rpc_wake_up_queued_task);
/*
* Wake up the next task on a priority queue.
*/
-static struct rpc_task * __rpc_wake_up_next_priority(struct rpc_wait_queue *queue)
+static struct rpc_task *__rpc_find_next_queued_priority(struct rpc_wait_queue *queue)
{
struct list_head *q;
struct rpc_task *task;
@@ -467,30 +476,54 @@ new_queue:
new_owner:
rpc_set_waitqueue_owner(queue, task->tk_owner);
out:
- rpc_wake_up_task_queue_locked(queue, task);
return task;
}
+static struct rpc_task *__rpc_find_next_queued(struct rpc_wait_queue *queue)
+{
+ if (RPC_IS_PRIORITY(queue))
+ return __rpc_find_next_queued_priority(queue);
+ if (!list_empty(&queue->tasks[0]))
+ return list_first_entry(&queue->tasks[0], struct rpc_task, u.tk_wait.list);
+ return NULL;
+}
+
/*
- * Wake up the next task on the wait queue.
+ * Wake up the first task on the wait queue.
*/
-struct rpc_task * rpc_wake_up_next(struct rpc_wait_queue *queue)
+struct rpc_task *rpc_wake_up_first(struct rpc_wait_queue *queue,
+ bool (*func)(struct rpc_task *, void *), void *data)
{
struct rpc_task *task = NULL;
- dprintk("RPC: wake_up_next(%p \"%s\")\n",
+ dprintk("RPC: wake_up_first(%p \"%s\")\n",
queue, rpc_qname(queue));
spin_lock_bh(&queue->lock);
- if (RPC_IS_PRIORITY(queue))
- task = __rpc_wake_up_next_priority(queue);
- else {
- task_for_first(task, &queue->tasks[0])
+ task = __rpc_find_next_queued(queue);
+ if (task != NULL) {
+ if (func(task, data))
rpc_wake_up_task_queue_locked(queue, task);
+ else
+ task = NULL;
}
spin_unlock_bh(&queue->lock);
return task;
}
+EXPORT_SYMBOL_GPL(rpc_wake_up_first);
+
+static bool rpc_wake_up_next_func(struct rpc_task *task, void *data)
+{
+ return true;
+}
+
+/*
+ * Wake up the next task on the wait queue.
+*/
+struct rpc_task *rpc_wake_up_next(struct rpc_wait_queue *queue)
+{
+ return rpc_wake_up_first(queue, rpc_wake_up_next_func, NULL);
+}
EXPORT_SYMBOL_GPL(rpc_wake_up_next);
/**
@@ -501,14 +534,18 @@ EXPORT_SYMBOL_GPL(rpc_wake_up_next);
*/
void rpc_wake_up(struct rpc_wait_queue *queue)
{
- struct rpc_task *task, *next;
struct list_head *head;
spin_lock_bh(&queue->lock);
head = &queue->tasks[queue->maxpriority];
for (;;) {
- list_for_each_entry_safe(task, next, head, u.tk_wait.list)
+ while (!list_empty(head)) {
+ struct rpc_task *task;
+ task = list_first_entry(head,
+ struct rpc_task,
+ u.tk_wait.list);
rpc_wake_up_task_queue_locked(queue, task);
+ }
if (head == &queue->tasks[0])
break;
head--;
@@ -526,13 +563,16 @@ EXPORT_SYMBOL_GPL(rpc_wake_up);
*/
void rpc_wake_up_status(struct rpc_wait_queue *queue, int status)
{
- struct rpc_task *task, *next;
struct list_head *head;
spin_lock_bh(&queue->lock);
head = &queue->tasks[queue->maxpriority];
for (;;) {
- list_for_each_entry_safe(task, next, head, u.tk_wait.list) {
+ while (!list_empty(head)) {
+ struct rpc_task *task;
+ task = list_first_entry(head,
+ struct rpc_task,
+ u.tk_wait.list);
task->tk_status = status;
rpc_wake_up_task_queue_locked(queue, task);
}
@@ -677,6 +717,7 @@ static void __rpc_execute(struct rpc_task *task)
if (do_action == NULL)
break;
}
+ trace_rpc_task_run_action(task->tk_client, task, task->tk_action);
do_action(task);
/*