[PATCH v1 4/7] svcrdma: trace cc_release calls
From: Chuck Lever <cel@kernel.org>
Date: 2023-06-12 14:13:58
Subsystem:
kernel nfsd, sunrpc, and lockd servers, networking [general], nfs, sunrpc, and lockd clients, the rest, tracing · Maintainers:
Chuck Lever, Jeff Layton, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Trond Myklebust, Anna Schumaker, Linus Torvalds, Steven Rostedt, Masami Hiramatsu
From: Chuck Lever <redacted> This event brackets the svcrdma_post_* trace points. If this trace event is enabled but does not appear as expected, that indicates a chunk_ctxt leak. Signed-off-by: Chuck Lever <redacted> --- include/trace/events/rpcrdma.h | 8 ++++++++ net/sunrpc/xprtrdma/svc_rdma_rw.c | 2 ++ 2 files changed, 10 insertions(+)
diff --git a/include/trace/events/rpcrdma.h b/include/trace/events/rpcrdma.h
index 8f461e04e5f0..f8069ef2ee0f 100644
--- a/include/trace/events/rpcrdma.h
+++ b/include/trace/events/rpcrdma.h@@ -2112,6 +2112,14 @@ DEFINE_POST_CHUNK_EVENT(read); DEFINE_POST_CHUNK_EVENT(write); DEFINE_POST_CHUNK_EVENT(reply); +DEFINE_EVENT(svcrdma_post_chunk_class, svcrdma_cc_release, + TP_PROTO( + const struct rpc_rdma_cid *cid, + int sqecount + ), + TP_ARGS(cid, sqecount) +); + TRACE_EVENT(svcrdma_wc_read, TP_PROTO( const struct ib_wc *wc,
diff --git a/net/sunrpc/xprtrdma/svc_rdma_rw.c b/net/sunrpc/xprtrdma/svc_rdma_rw.c
index 59ea87b5f458..9836406cc41e 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_rw.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_rw.c@@ -191,6 +191,8 @@ static void svc_rdma_cc_release(struct svc_rdma_chunk_ctxt *cc, struct svc_rdma_rw_ctxt *ctxt; LLIST_HEAD(free); + trace_svcrdma_cc_release(&cc->cc_cid, cc->cc_sqecount); + first = last = NULL; while ((ctxt = svc_rdma_next_ctxt(&cc->cc_rwctxts)) != NULL) { list_del(&ctxt->rw_list);