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xprtrdma: Move send_wr to struct rpcrdma_req

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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 <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Chuck Lever 2016-09-15 10:56:43 -04:00 committed by Anna Schumaker
parent b157380af1
commit 90aab60296
4 changed files with 24 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
net/sunrpc/xprtrdma/backchannel.c
View File

@ -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:

5
net/sunrpc/xprtrdma/rpc_rdma.c
View File

@ -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:

36
net/sunrpc/xprtrdma/verbs.c
View File

@ -849,6 +849,10 @@ 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;
}
@ -1128,7 +1132,7 @@ 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);
@ -1259,38 +1263,32 @@ 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;

4
net/sunrpc/xprtrdma/xprt_rdma.h
View File

@ -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 */