linux-kernel - Re: [PATCH net-next] net: bcmgenet: suppress warnings on failed Rx SKB allocations

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Date:   Fri, 24 Apr 2020 16:50:11 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     opendmb@...il.com
Cc:     f.fainelli@...il.com, bcm-kernel-feedback-list@...adcom.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next] net: bcmgenet: suppress warnings on failed Rx
 SKB allocations

From: Doug Berger <opendmb@...il.com>
Date: Thu, 23 Apr 2020 16:02:11 -0700

> 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@...il.com>

Applied.