Commit 907e34a7 authored by Chuck Lever's avatar Chuck Lever
Browse files

svcrdma: Add lockdep class keys for transport locks 



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: default avatarChuck Lever <chuck.lever@oracle.com>
parent bfb81535

net/sunrpc/xprtrdma/svc_rdma_transport.c

+6 −0
Original line number Diff line number Diff line
@@ -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