[v1,05/22] SUNRPC: Replace dprintk() call site in xprt_prepare_transmit
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Message ID 20200708200926.22129.1042.stgit@manet.1015granger.net
State New
Headers show
Series
  • SUNRPC: Replace dprintk calls with tracepoints
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Commit Message

Chuck Lever July 8, 2020, 8:09 p.m. UTC
Generate a trace event when an RPC request is queued without being
sent immediately.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 include/trace/events/sunrpc.h |    1 +
 net/sunrpc/xprt.c             |    4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

Patch
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diff --git a/include/trace/events/sunrpc.h b/include/trace/events/sunrpc.h
index 7ff40870d122..b5d1ed7f996a 100644
--- a/include/trace/events/sunrpc.h
+++ b/include/trace/events/sunrpc.h
@@ -1093,6 +1093,7 @@  DECLARE_EVENT_CLASS(xprt_writelock_event,
 
 DEFINE_WRITELOCK_EVENT(reserve_xprt);
 DEFINE_WRITELOCK_EVENT(release_xprt);
+DEFINE_WRITELOCK_EVENT(transmit_queued);
 
 DECLARE_EVENT_CLASS(xprt_cong_event,
 	TP_PROTO(
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index cb5cf74105aa..1ce89778119c 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -1399,9 +1399,9 @@  bool xprt_prepare_transmit(struct rpc_task *task)
 	struct rpc_rqst	*req = task->tk_rqstp;
 	struct rpc_xprt	*xprt = req->rq_xprt;
 
-	dprintk("RPC: %5u xprt_prepare_transmit\n", task->tk_pid);
-
 	if (!xprt_lock_write(xprt, task)) {
+		trace_xprt_transmit_queued(xprt, task);
+
 		/* Race breaker: someone may have transmitted us */
 		if (!test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate))
 			rpc_wake_up_queued_task_set_status(&xprt->sending,