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| author | Christoph Hellwig <hch@lst.de> | 2015-10-08 09:16:33 +0100 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2015-10-08 11:09:10 +0100 |
| commit | e622f2f4ad2142d2a613a57fb85f8cf737935ef5 (patch) | |
| tree | 19fa458bcaacf3f8b2f5e40676f748afc3df1e84 /net/sunrpc/xprtrdma/frwr_ops.c | |
| parent | b8cab5dab15ff5c2acc3faefdde28919b0341c11 (diff) | |
| download | linux-e622f2f4ad2142d2a613a57fb85f8cf737935ef5.tar.gz linux-e622f2f4ad2142d2a613a57fb85f8cf737935ef5.tar.bz2 linux-e622f2f4ad2142d2a613a57fb85f8cf737935ef5.zip | |
IB: split struct ib_send_wr
This patch split up struct ib_send_wr so that all non-trivial verbs
use their own structure which embedds struct ib_send_wr. This dramaticly
shrinks the size of a WR for most common operations:
sizeof(struct ib_send_wr) (old): 96
sizeof(struct ib_send_wr): 48
sizeof(struct ib_rdma_wr): 64
sizeof(struct ib_atomic_wr): 96
sizeof(struct ib_ud_wr): 88
sizeof(struct ib_fast_reg_wr): 88
sizeof(struct ib_bind_mw_wr): 96
sizeof(struct ib_sig_handover_wr): 80
And with Sagi's pending MR rework the fast registration WR will also be
down to a reasonable size:
sizeof(struct ib_fastreg_wr): 64
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com> [srp, srpt]
Reviewed-by: Chuck Lever <chuck.lever@oracle.com> [sunrpc]
Tested-by: Haggai Eran <haggaie@mellanox.com>
Tested-by: Sagi Grimberg <sagig@mellanox.com>
Tested-by: Steve Wise <swise@opengridcomputing.com>
Diffstat (limited to 'net/sunrpc/xprtrdma/frwr_ops.c')
| -rw-r--r-- | net/sunrpc/xprtrdma/frwr_ops.c | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/net/sunrpc/xprtrdma/frwr_ops.c b/net/sunrpc/xprtrdma/frwr_ops.c index 5318951b3b53..0d2f46f600b6 100644 --- a/net/sunrpc/xprtrdma/frwr_ops.c +++ b/net/sunrpc/xprtrdma/frwr_ops.c @@ -312,7 +312,8 @@ frwr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg, struct rpcrdma_mw *mw; struct rpcrdma_frmr *frmr; struct ib_mr *mr; - struct ib_send_wr fastreg_wr, *bad_wr; + struct ib_fast_reg_wr fastreg_wr; + struct ib_send_wr *bad_wr; u8 key; int len, pageoff; int i, rc; @@ -358,23 +359,23 @@ frwr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg, __func__, mw, i, len); memset(&fastreg_wr, 0, sizeof(fastreg_wr)); - fastreg_wr.wr_id = (unsigned long)(void *)mw; - fastreg_wr.opcode = IB_WR_FAST_REG_MR; - fastreg_wr.wr.fast_reg.iova_start = seg1->mr_dma + pageoff; - fastreg_wr.wr.fast_reg.page_list = frmr->fr_pgl; - fastreg_wr.wr.fast_reg.page_shift = PAGE_SHIFT; - fastreg_wr.wr.fast_reg.page_list_len = page_no; - fastreg_wr.wr.fast_reg.length = len; - fastreg_wr.wr.fast_reg.access_flags = writing ? + fastreg_wr.wr.wr_id = (unsigned long)(void *)mw; + fastreg_wr.wr.opcode = IB_WR_FAST_REG_MR; + fastreg_wr.iova_start = seg1->mr_dma + pageoff; + fastreg_wr.page_list = frmr->fr_pgl; + fastreg_wr.page_shift = PAGE_SHIFT; + fastreg_wr.page_list_len = page_no; + fastreg_wr.length = len; + fastreg_wr.access_flags = writing ? IB_ACCESS_REMOTE_WRITE | IB_ACCESS_LOCAL_WRITE : IB_ACCESS_REMOTE_READ; mr = frmr->fr_mr; key = (u8)(mr->rkey & 0x000000FF); ib_update_fast_reg_key(mr, ++key); - fastreg_wr.wr.fast_reg.rkey = mr->rkey; + fastreg_wr.rkey = mr->rkey; DECR_CQCOUNT(&r_xprt->rx_ep); - rc = ib_post_send(ia->ri_id->qp, &fastreg_wr, &bad_wr); + rc = ib_post_send(ia->ri_id->qp, &fastreg_wr.wr, &bad_wr); if (rc) goto out_senderr; |