Return-Path: Received: from mail-it0-f67.google.com ([209.85.214.67]:36315 "EHLO mail-it0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752877AbcHWRy3 (ORCPT ); Tue, 23 Aug 2016 13:54:29 -0400 Subject: [PATCH v2 13/22] xprtrdma: Move send_wr to struct rpcrdma_req From: Chuck Lever To: linux-rdma@vger.kernel.org, linux-nfs@vger.kernel.org Date: Tue, 23 Aug 2016 13:53:50 -0400 Message-ID: <20160823175350.13038.83307.stgit@manet.1015granger.net> In-Reply-To: <20160823174402.13038.84561.stgit@manet.1015granger.net> References: <20160823174402.13038.84561.stgit@manet.1015granger.net> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Sender: linux-nfs-owner@vger.kernel.org List-ID: Clean up: Most of the fields in each send_wr do not vary. There is no need to initialize them before each ib_post_send(). This removes a large-ish data structure from the stack. Signed-off-by: Chuck Lever --- net/sunrpc/xprtrdma/backchannel.c | 3 ++- net/sunrpc/xprtrdma/rpc_rdma.c | 5 +++-- net/sunrpc/xprtrdma/verbs.c | 36 +++++++++++++++++------------------- net/sunrpc/xprtrdma/xprt_rdma.h | 4 ++-- 4 files changed, 24 insertions(+), 24 deletions(-) diff --git a/net/sunrpc/xprtrdma/backchannel.c b/net/sunrpc/xprtrdma/backchannel.c index 887ef44..61a58f5 100644 --- a/net/sunrpc/xprtrdma/backchannel.c +++ b/net/sunrpc/xprtrdma/backchannel.c @@ -241,7 +241,8 @@ int rpcrdma_bc_marshal_reply(struct rpc_rqst *rqst) req->rl_send_iov[1].length = rpclen; req->rl_send_iov[1].lkey = rdmab_lkey(req->rl_sendbuf); - req->rl_niovs = 2; + req->rl_send_wr.num_sge = 2; + return 0; out_map: diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c index 6187cee..c2906e3 100644 --- a/net/sunrpc/xprtrdma/rpc_rdma.c +++ b/net/sunrpc/xprtrdma/rpc_rdma.c @@ -687,7 +687,7 @@ rpcrdma_marshal_req(struct rpc_rqst *rqst) req->rl_send_iov[0].length = hdrlen; req->rl_send_iov[0].lkey = rdmab_lkey(req->rl_rdmabuf); - req->rl_niovs = 1; + req->rl_send_wr.num_sge = 1; if (rtype == rpcrdma_areadch) return 0; @@ -697,7 +697,8 @@ rpcrdma_marshal_req(struct rpc_rqst *rqst) req->rl_send_iov[1].length = rpclen; req->rl_send_iov[1].lkey = rdmab_lkey(req->rl_sendbuf); - req->rl_niovs = 2; + req->rl_send_wr.num_sge = 2; + return 0; out_overflow: diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c index 81cae65..d5e88ee 100644 --- a/net/sunrpc/xprtrdma/verbs.c +++ b/net/sunrpc/xprtrdma/verbs.c @@ -848,6 +848,10 @@ rpcrdma_create_req(struct rpcrdma_xprt *r_xprt) req->rl_cqe.done = rpcrdma_wc_send; req->rl_buffer = &r_xprt->rx_buf; INIT_LIST_HEAD(&req->rl_registered); + req->rl_send_wr.next = NULL; + req->rl_send_wr.wr_cqe = &req->rl_cqe; + req->rl_send_wr.sg_list = req->rl_send_iov; + req->rl_send_wr.opcode = IB_WR_SEND; return req; } @@ -1112,7 +1116,7 @@ rpcrdma_buffer_put(struct rpcrdma_req *req) struct rpcrdma_buffer *buffers = req->rl_buffer; struct rpcrdma_rep *rep = req->rl_reply; - req->rl_niovs = 0; + req->rl_send_wr.num_sge = 0; req->rl_reply = NULL; spin_lock(&buffers->rb_lock); @@ -1240,38 +1244,32 @@ rpcrdma_ep_post(struct rpcrdma_ia *ia, struct rpcrdma_req *req) { struct ib_device *device = ia->ri_device; - struct ib_send_wr send_wr, *send_wr_fail; - struct rpcrdma_rep *rep = req->rl_reply; - struct ib_sge *iov = req->rl_send_iov; + struct ib_send_wr *send_wr = &req->rl_send_wr; + struct ib_send_wr *send_wr_fail; + struct ib_sge *sge = req->rl_send_iov; int i, rc; - if (rep) { - rc = rpcrdma_ep_post_recv(ia, rep); + if (req->rl_reply) { + rc = rpcrdma_ep_post_recv(ia, req->rl_reply); if (rc) return rc; req->rl_reply = NULL; } - send_wr.next = NULL; - send_wr.wr_cqe = &req->rl_cqe; - send_wr.sg_list = iov; - send_wr.num_sge = req->rl_niovs; - send_wr.opcode = IB_WR_SEND; - - for (i = 0; i < send_wr.num_sge; i++) - ib_dma_sync_single_for_device(device, iov[i].addr, - iov[i].length, DMA_TO_DEVICE); + for (i = 0; i < send_wr->num_sge; i++) + ib_dma_sync_single_for_device(device, sge[i].addr, + sge[i].length, DMA_TO_DEVICE); dprintk("RPC: %s: posting %d s/g entries\n", - __func__, send_wr.num_sge); + __func__, send_wr->num_sge); if (DECR_CQCOUNT(ep) > 0) - send_wr.send_flags = 0; + send_wr->send_flags = 0; else { /* Provider must take a send completion every now and then */ INIT_CQCOUNT(ep); - send_wr.send_flags = IB_SEND_SIGNALED; + send_wr->send_flags = IB_SEND_SIGNALED; } - rc = ib_post_send(ia->ri_id->qp, &send_wr, &send_wr_fail); + rc = ib_post_send(ia->ri_id->qp, send_wr, &send_wr_fail); if (rc) goto out_postsend_err; return 0; diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h index 44efff7..a6a0336 100644 --- a/net/sunrpc/xprtrdma/xprt_rdma.h +++ b/net/sunrpc/xprtrdma/xprt_rdma.h @@ -284,10 +284,10 @@ struct rpcrdma_mr_seg { /* chunk descriptors */ struct rpcrdma_buffer; struct rpcrdma_req { struct list_head rl_free; - unsigned int rl_niovs; unsigned int rl_connect_cookie; struct rpcrdma_buffer *rl_buffer; - struct rpcrdma_rep *rl_reply;/* holder for reply buffer */ + struct rpcrdma_rep *rl_reply; + struct ib_send_wr rl_send_wr; struct ib_sge rl_send_iov[RPCRDMA_MAX_IOVS]; struct rpcrdma_regbuf *rl_rdmabuf; /* xprt header */ struct rpcrdma_regbuf *rl_sendbuf; /* rq_snd_buf */