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SUNRPC: Replace dprintk() call site in xprt_prepare_transmit

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Generate a trace event when an RPC request is queued without being
sent immediately.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Chuck Lever 2020-07-08 16:09:26 -04:00 committed by Anna Schumaker
parent 09d2ba0cb1
commit 9ce07ae5eb
2 changed files with 3 additions and 2 deletions
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1
include/trace/events/sunrpc.h
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@ -1093,6 +1093,7 @@ DECLARE_EVENT_CLASS(xprt_writelock_event,
DEFINE_WRITELOCK_EVENT(reserve_xprt); DEFINE_WRITELOCK_EVENT(reserve_xprt);
DEFINE_WRITELOCK_EVENT(release_xprt); DEFINE_WRITELOCK_EVENT(release_xprt);
DEFINE_WRITELOCK_EVENT(transmit_queued);
DECLARE_EVENT_CLASS(xprt_cong_event, DECLARE_EVENT_CLASS(xprt_cong_event,
TP_PROTO( TP_PROTO(

4
net/sunrpc/xprt.c
View File

@ -1408,9 +1408,9 @@ bool xprt_prepare_transmit(struct rpc_task *task)
struct rpc_rqst *req = task->tk_rqstp; struct rpc_rqst *req = task->tk_rqstp;
struct rpc_xprt *xprt = req->rq_xprt; struct rpc_xprt *xprt = req->rq_xprt;
dprintk("RPC: %5u xprt_prepare_transmit\n", task->tk_pid);
if (!xprt_lock_write(xprt, task)) { if (!xprt_lock_write(xprt, task)) {
trace_xprt_transmit_queued(xprt, task);
/* Race breaker: someone may have transmitted us */ /* Race breaker: someone may have transmitted us */
if (!test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate)) if (!test_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate))
rpc_wake_up_queued_task_set_status(&xprt->sending, rpc_wake_up_queued_task_set_status(&xprt->sending,