SUNRPC: Add tracepoints for dropped and deferred requests
Dropping and/or deferring requests has an impact on performance. Let's
make sure we can trace those events.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index 4d2189a..e7082a4 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -875,6 +875,7 @@
*/
void svc_drop(struct svc_rqst *rqstp)
{
+ trace_svc_drop(rqstp);
dprintk("svc: xprt %p dropped request\n", rqstp->rq_xprt);
svc_xprt_release(rqstp);
}
@@ -1152,6 +1153,7 @@
spin_unlock(&xprt->xpt_lock);
dprintk("revisit canceled\n");
svc_xprt_put(xprt);
+ trace_svc_drop_deferred(dr);
kfree(dr);
return;
}
@@ -1209,6 +1211,7 @@
set_bit(RQ_DROPME, &rqstp->rq_flags);
dr->handle.revisit = svc_revisit;
+ trace_svc_defer(rqstp);
return &dr->handle;
}
@@ -1249,6 +1252,7 @@
struct svc_deferred_req,
handle.recent);
list_del_init(&dr->handle.recent);
+ trace_svc_revisit_deferred(dr);
} else
clear_bit(XPT_DEFERRED, &xprt->xpt_flags);
spin_unlock(&xprt->xpt_lock);