netdev - Re: [PATCH v2 net-next 3/4] net: dsa: mv88e6xxx: replace ATU violation prints with trace points

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Date:   Fri, 9 Dec 2022 11:38:41 -0800
From:   Saeed Mahameed <saeed@...nel.org>
To:     Vladimir Oltean <vladimir.oltean@....com>
Cc:     netdev@...r.kernel.org, Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        "Hans J. Schultz" <netdev@...io-technology.com>
Subject: Re: [PATCH v2 net-next 3/4] net: dsa: mv88e6xxx: replace ATU
 violation prints with trace points

On 09 Dec 19:28, Vladimir Oltean wrote:
>In applications where the switch ports must perform 802.1X based
>authentication and are therefore locked, ATU violation interrupts are
>quite to be expected as part of normal operation. The problem is that
>they currently spam the kernel log, even if rate limited.
>
>Create a series of trace points, all derived from the same event class,
>which log these violations to the kernel's trace buffer, which is both
>much faster and much easier to ignore than printing to a serial console.
>
>New usage model:
>
>$ trace-cmd list | grep mv88e6xxx
>mv88e6xxx
>mv88e6xxx:mv88e6xxx_atu_full_violation
>mv88e6xxx:mv88e6xxx_atu_miss_violation
>mv88e6xxx:mv88e6xxx_atu_member_violation
>$ trace-cmd record -e mv88e6xxx sleep 10
>
>Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>

My knowledge on dsa is very limited but for the tracepoints logic:
Reviewed-by: Saeed Mahameed <saeed@...nel.org>