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Commit d39e0602 authored Apr 09, 2009 by Steve Wise Committed by David S. Miller Apr 09, 2009

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>

parent 11bc9421

net/rds/ib_send.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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;

net/rds/iw_send.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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;