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Commit 82ea2d76 authored by Trond Myklebust's avatar Trond Myklebust Committed by J. Bruce Fields
Browse files

SUNRPC: Add a tracepoint for server socket out-of-space conditions 



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: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
parent d28c442f

include/trace/events/sunrpc.h

+9 −1
Original line number Diff line number Diff line
@@ -553,7 +553,7 @@ 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),
@@ -582,6 +582,14 @@ 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),

net/sunrpc/svc_xprt.c

+6 −2
Original line number Diff line number Diff line
@@ -333,8 +333,12 @@ 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;

}