[rds-devel] [PATCH ofed-1.4.1] RDS/IW+IB: Set the RDS_LL_SEND_FULL bit when we're throttled.
Steve Wise
swise at opengridcomputing.com
Thu Mar 12 14:21:22 PDT 2009
The RDS_LL_SEND_FULL bit should be set when we stop transmitted due to
flow control. Otherwise the send worker will keep trying as opposed to
sleeping until we unthrottle. Saves CPU.
Signed-off-by: Steve Wise <swise at opengridcomputing.com>
---
net/rds/ib_send.c | 2 +-
net/rds/iw_send.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/rds/ib_send.c b/net/rds/ib_send.c
index 87f6616..c7ca50d 100644
--- a/net/rds/ib_send.c
+++ b/net/rds/ib_send.c
@@ -506,7 +506,7 @@ int rds_ib_xmit(struct rds_connection *conn, struct rds_message *rm,
flow_controlled++;
}
if (work_alloc == 0) {
- rds_ib_ring_unalloc(&ic->i_send_ring, work_alloc);
+ set_bit(RDS_LL_SEND_FULL, &conn->c_flags);
rds_ib_stats_inc(s_ib_tx_throttle);
ret = -ENOMEM;
goto out;
diff --git a/net/rds/iw_send.c b/net/rds/iw_send.c
index c5b4308..f477a5b 100644
--- a/net/rds/iw_send.c
+++ b/net/rds/iw_send.c
@@ -549,7 +549,7 @@ int rds_iw_xmit(struct rds_connection *conn, struct rds_message *rm,
flow_controlled++;
}
if (work_alloc == 0) {
- rds_iw_ring_unalloc(&ic->i_send_ring, work_alloc);
+ set_bit(RDS_LL_SEND_FULL, &conn->c_flags);
rds_iw_stats_inc(s_iw_tx_throttle);
ret = -ENOMEM;
goto out;
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