diff options
| 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 /drivers/infiniband/ulp/iser/iscsi_iser.h | |
| parent | b8cab5dab15ff5c2acc3faefdde28919b0341c11 (diff) | |
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 'drivers/infiniband/ulp/iser/iscsi_iser.h')
| -rw-r--r-- | drivers/infiniband/ulp/iser/iscsi_iser.h | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.h b/drivers/infiniband/ulp/iser/iscsi_iser.h index a5edd6ede692..2fab519dbd86 100644 --- a/drivers/infiniband/ulp/iser/iscsi_iser.h +++ b/drivers/infiniband/ulp/iser/iscsi_iser.h @@ -300,7 +300,11 @@ struct iser_tx_desc { int num_sge; bool mapped; u8 wr_idx; - struct ib_send_wr wrs[ISER_MAX_WRS]; + union iser_wr { + struct ib_send_wr send; + struct ib_fast_reg_wr fast_reg; + struct ib_sig_handover_wr sig; + } wrs[ISER_MAX_WRS]; struct iser_mem_reg data_reg; struct iser_mem_reg prot_reg; struct ib_sig_attrs sig_attrs; @@ -712,11 +716,11 @@ iser_reg_desc_put_fmr(struct ib_conn *ib_conn, static inline struct ib_send_wr * iser_tx_next_wr(struct iser_tx_desc *tx_desc) { - struct ib_send_wr *cur_wr = &tx_desc->wrs[tx_desc->wr_idx]; + struct ib_send_wr *cur_wr = &tx_desc->wrs[tx_desc->wr_idx].send; struct ib_send_wr *last_wr; if (tx_desc->wr_idx) { - last_wr = &tx_desc->wrs[tx_desc->wr_idx - 1]; + last_wr = &tx_desc->wrs[tx_desc->wr_idx - 1].send; last_wr->next = cur_wr; } tx_desc->wr_idx++; |