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[net-next,08/15] net/mlx5e: Do not busy-wait for UMR completion in Striding RQ

Message ID 20180331000252.30480-9-saeedm@mellanox.com
State Accepted, archived
Delegated to: David Miller
Headers show
Series [net-next,01/15] net/mlx5e: Use eq ptr from cq | expand

Commit Message

Saeed Mahameed March 31, 2018, 12:02 a.m. UTC 
From: Tariq Toukan <tariqt@mellanox.com>

Do not busy-wait a pending UMR completion. Under high HW load,
busy-waiting a delayed completion would fully utilize the CPU core
and mistakenly indicate a SW bottleneck.

Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_rx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
index 8aa94d3cff59..8eb9e7e89b09 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
@@ -527,7 +527,7 @@  bool mlx5e_post_rx_mpwqes(struct mlx5e_rq *rq)
 	if (!rq->mpwqe.umr_in_progress)
 		mlx5e_alloc_rx_mpwqe(rq, wq->head);
 
-	return true;
+	return false;
 }
 
 static void mlx5e_lro_update_tcp_hdr(struct mlx5_cqe64 *cqe, struct tcphdr *tcp)