RDS: Add flag for silent ops. Do atomic op before RDMA
Add a flag to the API so users can indicate they want
silent operations. This is needed because silent ops
cannot be used with USE_ONCE MRs, so we can't just
assume silent.
Also, change send_xmit to do atomic op before rdma op if
both are present, and centralize the hairy logic to determine if
we want to attempt silent, or not.
Signed-off-by: Andy Grover <andy.grover@oracle.com>
diff --git a/net/rds/rds.h b/net/rds/rds.h
index 46d190d..23b9210 100644
--- a/net/rds/rds.h
+++ b/net/rds/rds.h
@@ -319,6 +319,7 @@
unsigned int op_notify:1;
unsigned int op_recverr:1;
unsigned int op_mapped:1;
+ unsigned int op_silent:1;
unsigned int op_active:1;
struct scatterlist *op_sg;
struct rds_notifier *op_notifier;
@@ -333,6 +334,7 @@
unsigned int op_notify:1;
unsigned int op_recverr:1;
unsigned int op_mapped:1;
+ unsigned int op_silent:1;
unsigned int op_active:1;
unsigned int op_bytes;
unsigned int op_nents;