Commit b5cde6aa authored by Chuck Lever's avatar Chuck Lever Committed by Anna Schumaker
Browse files

xprtrdma: Remove rpcrdma_sendctx::sc_device 



Micro-optimization: Save eight bytes in a frequently allocated
structure.

Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
Signed-off-by: default avatarAnna Schumaker <Anna.Schumaker@Netapp.com>
parent f995879e

net/sunrpc/xprtrdma/rpc_rdma.c

+2 −2
Original line number Diff line number Diff line
@@ -564,6 +564,7 @@ static void rpcrdma_sendctx_done(struct kref *kref) 
 */

void rpcrdma_sendctx_unmap(struct rpcrdma_sendctx *sc)

{

	struct rpcrdma_regbuf *rb = sc->sc_req->rl_sendbuf;

	struct ib_sge *sge;



	if (!sc->sc_unmap_count)
@@ -575,7 +576,7 @@ void rpcrdma_sendctx_unmap(struct rpcrdma_sendctx *sc) 
	 */

	for (sge = &sc->sc_sges[2]; sc->sc_unmap_count;

	     ++sge, --sc->sc_unmap_count)

		ib_dma_unmap_page(sc->sc_device, sge->addr, sge->length,

		ib_dma_unmap_page(rdmab_device(rb), sge->addr, sge->length,

				  DMA_TO_DEVICE);



	kref_put(&sc->sc_req->rl_kref, rpcrdma_sendctx_done);
@@ -625,7 +626,6 @@ static bool rpcrdma_prepare_msg_sges(struct rpcrdma_xprt *r_xprt, 
	 */

	if (!rpcrdma_regbuf_dma_map(r_xprt, rb))

		goto out_regbuf;

	sc->sc_device = rdmab_device(rb);

	sge_no = 1;

	sge[sge_no].addr = rdmab_addr(rb);

	sge[sge_no].length = xdr->head[0].iov_len;

net/sunrpc/xprtrdma/xprt_rdma.h

+0 −1
Original line number Diff line number Diff line
@@ -221,7 +221,6 @@ struct rpcrdma_req; 
struct rpcrdma_sendctx {

	struct ib_send_wr	sc_wr;

	struct ib_cqe		sc_cqe;

	struct ib_device	*sc_device;

	struct rpcrdma_req	*sc_req;

	unsigned int		sc_unmap_count;

	struct ib_sge		sc_sges[];

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