From: Doug Berger <opendmb@gmail.com>
To: Florian Fainelli <f.fainelli@gmail.com>,
"David S. Miller" <davem@davemloft.net>
Cc: bcm-kernel-feedback-list@broadcom.com, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, Doug Berger <opendmb@gmail.com>
Subject: [PATCH net-next] net: bcmgenet: suppress warnings on failed Rx SKB allocations
Date: Thu, 23 Apr 2020 16:02:11 -0700 [thread overview]
Message-ID: <1587682931-38636-1-git-send-email-opendmb@gmail.com> (raw)
The driver is designed to drop Rx packets and reclaim the buffers
when an allocation fails, and the network interface needs to safely
handle this packet loss. Therefore, an allocation failure of Rx
SKBs is relatively benign.
However, the output of the warning message occurs with a high
scheduling priority that can cause excessive jitter/latency for
other high priority processing.
This commit suppresses the warning messages to prevent scheduling
problems while retaining the failure count in the statistics of
the network interface.
Signed-off-by: Doug Berger <opendmb@gmail.com>
---
drivers/net/ethernet/broadcom/genet/bcmgenet.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
index 20aba79becce..bfeff5585f4b 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
@@ -1617,7 +1617,8 @@ static struct sk_buff *bcmgenet_rx_refill(struct bcmgenet_priv *priv,
dma_addr_t mapping;
/* Allocate a new Rx skb */
- skb = netdev_alloc_skb(priv->dev, priv->rx_buf_len + SKB_ALIGNMENT);
+ skb = __netdev_alloc_skb(priv->dev, priv->rx_buf_len + SKB_ALIGNMENT,
+ GFP_ATOMIC | __GFP_NOWARN);
if (!skb) {
priv->mib.alloc_rx_buff_failed++;
netif_err(priv, rx_err, priv->dev,
--
2.7.4
next reply other threads:[~2020-04-23 23:02 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-23 23:02 Doug Berger [this message]
2020-04-23 23:10 ` [PATCH net-next] net: bcmgenet: suppress warnings on failed Rx SKB allocations Florian Fainelli
2020-04-24 23:49 ` David Miller
2020-04-24 23:50 ` David Miller
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