svcrdma: Remove the req_map cache

req_maps are no longer used by the send path and can thus be removed.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 0 insertions, 84 deletions

diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c
index 1597ca8ba3c0..a9d9cb1ba4c6 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_transport.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c
@@ -272,85 +272,6 @@ static void svc_rdma_destroy_ctxts(struct svcxprt_rdma *xprt)
 	}
 }
 
-static struct svc_rdma_req_map *alloc_req_map(gfp_t flags)
-{
-	struct svc_rdma_req_map *map;
-
-	map = kmalloc(sizeof(*map), flags);
-	if (map)
-		INIT_LIST_HEAD(&map->free);
-	return map;
-}
-
-static bool svc_rdma_prealloc_maps(struct svcxprt_rdma *xprt)
-{
-	unsigned int i;
-
-	/* One for each receive buffer on this connection. */
-	i = xprt->sc_max_requests;
-
-	while (i--) {
-		struct svc_rdma_req_map *map;
-
-		map = alloc_req_map(GFP_KERNEL);
-		if (!map) {
-			dprintk("svcrdma: No memory for request map\n");
-			return false;
-		}
-		list_add(&map->free, &xprt->sc_maps);
-	}
-	return true;
-}
-
-struct svc_rdma_req_map *svc_rdma_get_req_map(struct svcxprt_rdma *xprt)
-{
-	struct svc_rdma_req_map *map = NULL;
-
-	spin_lock(&xprt->sc_map_lock);
-	if (list_empty(&xprt->sc_maps))
-		goto out_empty;
-
-	map = list_first_entry(&xprt->sc_maps,
-			       struct svc_rdma_req_map, free);
-	list_del_init(&map->free);
-	spin_unlock(&xprt->sc_map_lock);
-
-out:
-	map->count = 0;
-	return map;
-
-out_empty:
-	spin_unlock(&xprt->sc_map_lock);
-
-	/* Pre-allocation amount was incorrect */
-	map = alloc_req_map(GFP_NOIO);
-	if (map)
-		goto out;
-
-	WARN_ONCE(1, "svcrdma: empty request map list?\n");
-	return NULL;
-}
-
-void svc_rdma_put_req_map(struct svcxprt_rdma *xprt,
-			  struct svc_rdma_req_map *map)
-{
-	spin_lock(&xprt->sc_map_lock);
-	list_add(&map->free, &xprt->sc_maps);
-	spin_unlock(&xprt->sc_map_lock);
-}
-
-static void svc_rdma_destroy_maps(struct svcxprt_rdma *xprt)
-{
-	while (!list_empty(&xprt->sc_maps)) {
-		struct svc_rdma_req_map *map;
-
-		map = list_first_entry(&xprt->sc_maps,
-				       struct svc_rdma_req_map, free);
-		list_del(&map->free);
-		kfree(map);
-	}
-}
-
 /* QP event handler */
 static void qp_event_handler(struct ib_event *event, void *context)
 {
@@ -544,7 +465,6 @@ static struct svcxprt_rdma *rdma_create_xprt(struct svc_serv *serv,
 	INIT_LIST_HEAD(&cma_xprt->sc_frmr_q);
 	INIT_LIST_HEAD(&cma_xprt->sc_ctxts);
 	INIT_LIST_HEAD(&cma_xprt->sc_rw_ctxts);
-	INIT_LIST_HEAD(&cma_xprt->sc_maps);
 	init_waitqueue_head(&cma_xprt->sc_send_wait);
 
 	spin_lock_init(&cma_xprt->sc_lock);
@@ -552,7 +472,6 @@ static struct svcxprt_rdma *rdma_create_xprt(struct svc_serv *serv,
 	spin_lock_init(&cma_xprt->sc_frmr_q_lock);
 	spin_lock_init(&cma_xprt->sc_ctxt_lock);
 	spin_lock_init(&cma_xprt->sc_rw_ctxt_lock);
-	spin_lock_init(&cma_xprt->sc_map_lock);
 
 	/*
 	 * Note that this implies that the underlying transport support
@@ -1004,8 +923,6 @@ static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt)
 
 	if (!svc_rdma_prealloc_ctxts(newxprt))
 		goto errout;
-	if (!svc_rdma_prealloc_maps(newxprt))
-		goto errout;
 
 	/*
 	 * Limit ORD based on client limit, local device limit, and
@@ -1237,7 +1154,6 @@ static void __svc_rdma_free(struct work_struct *work)
 	rdma_dealloc_frmr_q(rdma);
 	svc_rdma_destroy_rw_ctxts(rdma);
 	svc_rdma_destroy_ctxts(rdma);
-	svc_rdma_destroy_maps(rdma);
 
 	/* Destroy the QP if present (not a listener) */
 	if (rdma->sc_qp && !IS_ERR(rdma->sc_qp))