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Date:   Mon, 27 Jun 2022 11:46:44 -0700
From:   Jakub Kicinski <kuba@kernel.org>
To:     Vladimir Oltean <vladimir.oltean@nxp.com>
Cc:     netdev@vger.kernel.org, "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Paolo Abeni <pabeni@redhat.com>,
        Xiaoliang Yang <xiaoliang.yang_1@nxp.com>,
        Claudiu Manoil <claudiu.manoil@nxp.com>,
        Alexandre Belloni <alexandre.belloni@bootlin.com>,
        UNGLinuxDriver@microchip.com, Andrew Lunn <andrew@lunn.ch>,
        Vivien Didelot <vivien.didelot@gmail.com>,
        Florian Fainelli <f.fainelli@gmail.com>,
        Michael Walle <michael@walle.cc>,
        Vinicius Costa Gomes <vinicius.gomes@intel.com>,
        Maxim Kochetkov <fido_max@inbox.ru>,
        Colin Foster <colin.foster@in-advantage.com>,
        Richie Pearn <richard.pearn@nxp.com>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH net-next 4/4] net: dsa: felix: drop oversized frames
 with tc-taprio instead of hanging the port
Message-ID: <20220627114644.6c2c163b@kernel.org>
In-Reply-To: <20220626120505.2369600-5-vladimir.oltean@nxp.com>
References: <20220626120505.2369600-1-vladimir.oltean@nxp.com>
        <20220626120505.2369600-5-vladimir.oltean@nxp.com>
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On Sun, 26 Jun 2022 15:05:05 +0300 Vladimir Oltean wrote:
> When a frame is dropped due to a queue system oversize condition, the
> counter that increments is the generic "drop_tail" in ethtool -S, even
> if this isn't a tail drop as the rest (i.e. the controlling watermarks
> don't count these frames, as can be seen in "devlink sb occupancy show
> pci/0000:00:00.5 sb 0"). So the hardware counter is unspecific
> regarding the drop reason.

I had mixed feelings about the stats, as I usually do, but I don't
recall if I sent that email. Are you at least counting the drop_tail
into one of the standard tx error / drop stats so admins will notice?