RDS: make m_rdma_op a member of rds_message
This eliminates a separate memory alloc, although
it is now necessary to add an "r_active" flag, since
it is no longer to use the m_rdma_op pointer as an
indicator of if an rdma op is present.
rdma SGs allocated from rm sg pool.
rds_rm_size also gets bigger. It's a little inefficient to
run through CMSGs twice, but it makes later steps a lot smoother.
Signed-off-by: Andy Grover <andy.grover@oracle.com>
diff --git a/net/rds/ib_send.c b/net/rds/ib_send.c
index 575fce4..f0edfdb 100644
--- a/net/rds/ib_send.c
+++ b/net/rds/ib_send.c
@@ -85,8 +85,8 @@
rm->data.m_sg, rm->data.m_nents,
DMA_TO_DEVICE);
- if (rm->rdma.m_rdma_op) {
- rds_ib_send_unmap_rdma(ic, rm->rdma.m_rdma_op);
+ if (rm->rdma.m_rdma_op.r_active) {
+ rds_ib_send_unmap_rdma(ic, &rm->rdma.m_rdma_op);
/* If the user asked for a completion notification on this
* message, we can implement three different semantics:
@@ -110,10 +110,10 @@
*/
rds_ib_send_rdma_complete(rm, wc_status);
- if (rm->rdma.m_rdma_op->r_write)
- rds_stats_add(s_send_rdma_bytes, rm->rdma.m_rdma_op->r_bytes);
+ if (rm->rdma.m_rdma_op.r_write)
+ rds_stats_add(s_send_rdma_bytes, rm->rdma.m_rdma_op.r_bytes);
else
- rds_stats_add(s_recv_rdma_bytes, rm->rdma.m_rdma_op->r_bytes);
+ rds_stats_add(s_recv_rdma_bytes, rm->rdma.m_rdma_op.r_bytes);
}
/* If anyone waited for this message to get flushed out, wake
@@ -243,8 +243,8 @@
rm = rds_send_get_message(conn, send->s_op);
if (rm) {
- if (rm->rdma.m_rdma_op)
- rds_ib_send_unmap_rdma(ic, rm->rdma.m_rdma_op);
+ if (rm->rdma.m_rdma_op.r_active)
+ rds_ib_send_unmap_rdma(ic, &rm->rdma.m_rdma_op);
rds_ib_send_rdma_complete(rm, wc.status);
rds_message_put(rm);
}
@@ -560,10 +560,10 @@
/* If it has a RDMA op, tell the peer we did it. This is
* used by the peer to release use-once RDMA MRs. */
- if (rm->rdma.m_rdma_op) {
+ if (rm->rdma.m_rdma_op.r_active) {
struct rds_ext_header_rdma ext_hdr;
- ext_hdr.h_rdma_rkey = cpu_to_be32(rm->rdma.m_rdma_op->r_key);
+ ext_hdr.h_rdma_rkey = cpu_to_be32(rm->rdma.m_rdma_op.r_key);
rds_message_add_extension(&rm->m_inc.i_hdr,
RDS_EXTHDR_RDMA, &ext_hdr, sizeof(ext_hdr));
}
@@ -601,7 +601,7 @@
* or when requested by the user. Right now, we let
* the application choose.
*/
- if (rm->rdma.m_rdma_op && rm->rdma.m_rdma_op->r_fence)
+ if (rm->rdma.m_rdma_op.r_active && rm->rdma.m_rdma_op.r_fence)
send_flags = IB_SEND_FENCE;
/*