netdev - Re: [RFC PATCH 01/13] net: dsa: add plumbing for custom netdev statistics

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Message-ID: <20201018121640.jwzj6ivpis4gh4ki@skbuf>
Date:   Sun, 18 Oct 2020 12:16:41 +0000
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     Heiner Kallweit <hkallweit1@...il.com>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "andrew@...n.ch" <andrew@...n.ch>,
        "f.fainelli@...il.com" <f.fainelli@...il.com>,
        "vivien.didelot@...il.com" <vivien.didelot@...il.com>,
        "kuba@...nel.org" <kuba@...nel.org>,
        Christian Eggers <ceggers@...i.de>,
        Kurt Kanzenbach <kurt@...utronix.de>
Subject: Re: [RFC PATCH 01/13] net: dsa: add plumbing for custom netdev
 statistics

On Sun, Oct 18, 2020 at 02:02:46PM +0200, Heiner Kallweit wrote:
> Wouldn't a simple unsigned long (like in struct net_device_stats) be
> sufficient here? This would make handling the counter much simpler.
> And as far as I understand we talk about a packet counter that is
> touched in certain scenarios only.

I don't understand, in what sense 'sufficient'? This counter is exported
to ethtool which works with u64 values, how would an unsigned long,
which is u32 on 32-bit systems, help?