net/smc: reduce amount of status updates to peer
In smc_cdc_msg_recv_action() the received cdc message is evaluated.
To reduce the number of messaged triggered by this evaluation the logic
is streamlined. For the write_blocked condition we do not need to send
a response immediately. The remaining conditions can be put together
into one if clause.
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/smc/smc_cdc.c b/net/smc/smc_cdc.c
index 780b36c..28bbdb0 100644
--- a/net/smc/smc_cdc.c
+++ b/net/smc/smc_cdc.c
@@ -273,24 +273,18 @@ static void smc_cdc_msg_recv_action(struct smc_sock *smc,
smp_mb__after_atomic();
smc->sk.sk_data_ready(&smc->sk);
} else {
- if (conn->local_rx_ctrl.prod_flags.write_blocked ||
- conn->local_rx_ctrl.prod_flags.cons_curs_upd_req ||
- conn->local_rx_ctrl.prod_flags.urg_data_pending) {
- if (conn->local_rx_ctrl.prod_flags.urg_data_pending)
- conn->urg_state = SMC_URG_NOTYET;
- /* force immediate tx of current consumer cursor, but
- * under send_lock to guarantee arrival in seqno-order
- */
- if (smc->sk.sk_state != SMC_INIT)
- smc_tx_sndbuf_nonempty(conn);
- }
+ if (conn->local_rx_ctrl.prod_flags.write_blocked)
+ smc->sk.sk_data_ready(&smc->sk);
+ if (conn->local_rx_ctrl.prod_flags.urg_data_pending)
+ conn->urg_state = SMC_URG_NOTYET;
}
- /* piggy backed tx info */
/* trigger sndbuf consumer: RDMA write into peer RMBE and CDC */
- if (diff_cons && smc_tx_prepared_sends(conn)) {
+ if ((diff_cons && smc_tx_prepared_sends(conn)) ||
+ conn->local_rx_ctrl.prod_flags.cons_curs_upd_req ||
+ conn->local_rx_ctrl.prod_flags.urg_data_pending)
smc_tx_sndbuf_nonempty(conn);
- }
+
if (diff_cons && conn->urg_tx_pend &&
atomic_read(&conn->peer_rmbe_space) == conn->peer_rmbe_size) {
/* urg data confirmed by peer, indicate we're ready for more */
