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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: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Trond Myklebust 2016-06-24 10:55:45 -04:00 committed by J. Bruce Fields
parent d28c442f5b
commit 82ea2d7615
2 changed files with 15 additions and 3 deletions
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10
include/trace/events/sunrpc.h
View File

@ -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),

8
net/sunrpc/svc_xprt.c
View File

@ -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;
}