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xprtrdma: Move the rpcrdma_sendctx::sc_wr field

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Clean up: This field is not needed in the Send completion handler,
so it can be moved to struct rpcrdma_req to reduce the size of
struct rpcrdma_sendctx, and to reduce the amount of memory that
is sloshed between the sending process and the Send completion
process.

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 2019-10-17 14:31:35 -04:00 committed by Anna Schumaker
parent b5cde6aa88
commit dc15c3d5f1
5 changed files with 11 additions and 12 deletions
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5
include/trace/events/rpcrdma.h
View File

@ -667,9 +667,8 @@ TRACE_EVENT(xprtrdma_post_send,
__entry->client_id = rqst->rq_task->tk_client ?
rqst->rq_task->tk_client->cl_clid : -1;
__entry->req = req;
__entry->num_sge = req->rl_sendctx->sc_wr.num_sge;
__entry->signaled = req->rl_sendctx->sc_wr.send_flags &
IB_SEND_SIGNALED;
__entry->num_sge = req->rl_wr.num_sge;
__entry->signaled = req->rl_wr.send_flags & IB_SEND_SIGNALED;
__entry->status = status;
),

2
net/sunrpc/xprtrdma/frwr_ops.c
View File

@ -396,7 +396,7 @@ int frwr_send(struct rpcrdma_ia *ia, struct rpcrdma_req *req)
struct ib_send_wr *post_wr;
struct rpcrdma_mr *mr;
post_wr = &req->rl_sendctx->sc_wr;
post_wr = &req->rl_wr;
list_for_each_entry(mr, &req->rl_registered, mr_list) {
struct rpcrdma_frwr *frwr;

9
net/sunrpc/xprtrdma/rpc_rdma.c
View File

@ -599,7 +599,7 @@ static bool rpcrdma_prepare_hdr_sge(struct rpcrdma_xprt *r_xprt,
ib_dma_sync_single_for_device(rdmab_device(rb), sge->addr, sge->length,
DMA_TO_DEVICE);
sc->sc_wr.num_sge++;
req->rl_wr.num_sge++;
return true;
out_regbuf:
@ -711,7 +711,7 @@ map_tail:
}
out:
sc->sc_wr.num_sge += sge_no;
req->rl_wr.num_sge += sge_no;
if (sc->sc_unmap_count)
kref_get(&req->rl_kref);
return true;
@ -752,10 +752,13 @@ rpcrdma_prepare_send_sges(struct rpcrdma_xprt *r_xprt,
req->rl_sendctx = rpcrdma_sendctx_get_locked(r_xprt);
if (!req->rl_sendctx)
goto err;
req->rl_sendctx->sc_wr.num_sge = 0;
req->rl_sendctx->sc_unmap_count = 0;
req->rl_sendctx->sc_req = req;
kref_init(&req->rl_kref);
req->rl_wr.wr_cqe = &req->rl_sendctx->sc_cqe;
req->rl_wr.sg_list = req->rl_sendctx->sc_sges;
req->rl_wr.num_sge = 0;
req->rl_wr.opcode = IB_WR_SEND;
ret = -EIO;
if (!rpcrdma_prepare_hdr_sge(r_xprt, req, hdrlen))

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

@ -811,9 +811,6 @@ static struct rpcrdma_sendctx *rpcrdma_sendctx_create(struct rpcrdma_ia *ia)
if (!sc)
return NULL;
sc->sc_wr.wr_cqe = &sc->sc_cqe;
sc->sc_wr.sg_list = sc->sc_sges;
sc->sc_wr.opcode = IB_WR_SEND;
sc->sc_cqe.done = rpcrdma_wc_send;
return sc;
}
@ -1469,7 +1466,7 @@ rpcrdma_ep_post(struct rpcrdma_ia *ia,
struct rpcrdma_ep *ep,
struct rpcrdma_req *req)
{
struct ib_send_wr *send_wr = &req->rl_sendctx->sc_wr;
struct ib_send_wr *send_wr = &req->rl_wr;
int rc;
if (!ep->rep_send_count || kref_read(&req->rl_kref) > 1) {

2
net/sunrpc/xprtrdma/xprt_rdma.h
View File

@ -219,7 +219,6 @@ enum {
*/
struct rpcrdma_req;
struct rpcrdma_sendctx {
struct ib_send_wr sc_wr;
struct ib_cqe sc_cqe;
struct rpcrdma_req *sc_req;
unsigned int sc_unmap_count;
@ -314,6 +313,7 @@ struct rpcrdma_req {
struct rpcrdma_rep *rl_reply;
struct xdr_stream rl_stream;
struct xdr_buf rl_hdrbuf;
struct ib_send_wr rl_wr;
struct rpcrdma_sendctx *rl_sendctx;
struct rpcrdma_regbuf *rl_rdmabuf; /* xprt header */
struct rpcrdma_regbuf *rl_sendbuf; /* rq_snd_buf */