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| author | Chuck Lever <chuck.lever@oracle.com> | 2021-03-31 20:22:27 +0300 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@hammerspace.com> | 2021-04-14 16:36:29 +0300 |
| commit | e936a5970ef596ff48fca72aa8200955753c543f (patch) | |
| tree | 16183ba8032dcaacd4c9af5b54b8f79d4a9ccd53 /net/sunrpc/xprt.c | |
| parent | 7638e0bfaed1b653d3ca663e560e9ffb44bb1030 (diff) | |
| download | linux-e936a5970ef596ff48fca72aa8200955753c543f.tar.xz | |
SUNRPC: Add tracepoint that fires when an RPC is retransmitted
A separate tracepoint can be left enabled all the time to capture
rare but important retransmission events. So for example:
kworker/u26:3-568 [009] 156.967933: xprt_retransmit: task:44093@5 xid=0xa25dbc79 nfsv3 WRITE ntrans=2
Or, for example, enable all nfs and nfs4 tracepoints, and set up a
trigger to disable tracing when xprt_retransmit fires to capture
everything that leads up to it.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'net/sunrpc/xprt.c')
| -rw-r--r-- | net/sunrpc/xprt.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c index 80c94ead4aa0..67039ee443eb 100644 --- a/net/sunrpc/xprt.c +++ b/net/sunrpc/xprt.c @@ -1542,8 +1542,10 @@ xprt_request_transmit(struct rpc_rqst *req, struct rpc_task *snd_task) return status; } - if (is_retrans) + if (is_retrans) { task->tk_client->cl_stats->rpcretrans++; + trace_xprt_retransmit(req); + } xprt_inject_disconnect(xprt); |