Add a tracepoint to track when the processing of incoming RPC data gets
deferred due to out-of-space issues on the outgoing transport.
Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
---
include/trace/events/sunrpc.h | 10 +++++++++-
net/sunrpc/svc_xprt.c | 8 ++++++--
2 files changed, 15 insertions(+), 3 deletions(-)
diff --git a/include/trace/events/sunrpc.h b/include/trace/events/sunrpc.h
index a01a076ea060..f06701b3235c 100644
--- a/include/trace/events/sunrpc.h
+++ b/include/trace/events/sunrpc.h
@@ -556,7 +556,7 @@ TRACE_EVENT(svc_xprt_do_enqueue,
__entry->pid, show_svc_xprt_flags(__entry->flags))
);
-TRACE_EVENT(svc_xprt_dequeue,
+DECLARE_EVENT_CLASS(svc_xprt_event,
TP_PROTO(struct svc_xprt *xprt),
TP_ARGS(xprt),
@@ -585,6 +585,14 @@ TRACE_EVENT(svc_xprt_dequeue,
show_svc_xprt_flags(__entry->flags))
);
+DEFINE_EVENT(svc_xprt_event, svc_xprt_dequeue,
+ TP_PROTO(struct svc_xprt *xprt),
+ TP_ARGS(xprt));
+
+DEFINE_EVENT(svc_xprt_event, svc_xprt_no_write_space,
+ TP_PROTO(struct svc_xprt *xprt),
+ TP_ARGS(xprt));
+
TRACE_EVENT(svc_wake_up,
TP_PROTO(int pid),
diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index f5572e31d518..58372076a41a 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -331,8 +331,12 @@ static bool svc_xprt_has_something_to_do(struct svc_xprt *xprt)
{
if (xprt->xpt_flags & ((1<<XPT_CONN)|(1<<XPT_CLOSE)))
return true;
- if (xprt->xpt_flags & ((1<<XPT_DATA)|(1<<XPT_DEFERRED)))
- return xprt->xpt_ops->xpo_has_wspace(xprt);
+ if (xprt->xpt_flags & ((1<<XPT_DATA)|(1<<XPT_DEFERRED))) {
+ if (xprt->xpt_ops->xpo_has_wspace(xprt))
+ return true;
+ trace_svc_xprt_no_write_space(xprt);
+ return false;
+ }
return false;
}
--
2.7.4
--
To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
