From: Chuck Lever <chuck.lever@xxxxxxxxxx>
Two svcrdma-related transport locks can become quite contended.
Collate their use and make them easy to find in /proc/lock_stat for
better observability.
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
net/sunrpc/xprtrdma/svc_rdma_transport.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c
index c046916df007..3826da1c15f3 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_transport.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c
@@ -125,6 +125,9 @@ static void qp_event_handler(struct ib_event *event, void *context)
static struct svcxprt_rdma *svc_rdma_create_xprt(struct svc_serv *serv,
struct net *net, int node)
{
+ static struct lock_class_key svcrdma_rwctx_lock;
+ static struct lock_class_key svcrdma_sctx_lock;
+ static struct lock_class_key svcrdma_dto_lock;
struct svcxprt_rdma *cma_xprt;
cma_xprt = kzalloc_node(sizeof(*cma_xprt), GFP_KERNEL, node);
@@ -141,8 +144,11 @@ static struct svcxprt_rdma *svc_rdma_create_xprt(struct svc_serv *serv,
spin_lock_init(&cma_xprt->sc_lock);
spin_lock_init(&cma_xprt->sc_rq_dto_lock);
+ lockdep_set_class(&cma_xprt->sc_rq_dto_lock, &svcrdma_dto_lock);
spin_lock_init(&cma_xprt->sc_send_lock);
+ lockdep_set_class(&cma_xprt->sc_send_lock, &svcrdma_sctx_lock);
spin_lock_init(&cma_xprt->sc_rw_ctxt_lock);
+ lockdep_set_class(&cma_xprt->sc_rw_ctxt_lock, &svcrdma_rwctx_lock);
/*
* Note that this implies that the underlying transport support
