xprtrdma: Add xprtrdma_post_recvs_err() tracepoint
In the vast majority of cases, rc=0. Don't record that in the
post_recvs tracepoint. Instead, add a separate tracepoint that can
be left enabled all the time to capture the very rare immediate
errors returned by ib_post_recv().
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index 016f10a..1e9041c 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -1417,6 +1417,7 @@ void rpcrdma_post_recvs(struct rpcrdma_xprt *r_xprt, int needed, bool temp)
rc = ib_post_recv(ep->re_id->qp, wr,
(const struct ib_recv_wr **)&bad_wr);
if (rc) {
+ trace_xprtrdma_post_recvs_err(r_xprt, rc);
for (wr = bad_wr; wr;) {
struct rpcrdma_rep *rep;
@@ -1430,7 +1431,7 @@ void rpcrdma_post_recvs(struct rpcrdma_xprt *r_xprt, int needed, bool temp)
complete(&ep->re_done);
out:
- trace_xprtrdma_post_recvs(r_xprt, count, rc);
+ trace_xprtrdma_post_recvs(r_xprt, count);
ep->re_receive_count += count;
return;
}