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RDS/IW+IB: Set the RDS_LL_SEND_FULL bit when we're throttled. 

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@opengridcomputing.com>
Signed-off-by: Andy Grover <andy.grover@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Steve Wise 2009-04-09 14:09:38 +00:00 committed by David S. Miller
parent 11bc9421da
commit d39e0602bb
2 changed files with 2 additions and 2 deletions
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2
net/rds/ib_send.c
View File

@ -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;

2
net/rds/iw_send.c
View File

@ -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;