linux-kernel - Re: [PATCH net v2] net: dsa: tag_rtl4

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Message-ID: <20231102103123.hklqlsbb5kbq53mm@skbuf>
Date:   Thu, 2 Nov 2023 12:31:23 +0200
From:   Vladimir Oltean <olteanv@...il.com>
To:     Luiz Angelo Daros de Luca <luizluca@...il.com>
Cc:     Linus Walleij <linus.walleij@...aro.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>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net v2] net: dsa: tag_rtl4_a: Bump min packet size

Hi Luiz,

On Wed, Nov 01, 2023 at 09:35:30AM -0300, Luiz Angelo Daros de Luca wrote:
> Hi Linus,
> 
> Sorry but I noticed no issues:
> 
> From the router:
> 
> No. Time Source Destination Protocol Length Info
> 1 0.000000000 192.168.1.1 192.168.1.2 ICMP 1514 Echo (ping) request id=0x0789, seq=23/5888, ttl=64 (reply in 2)
> 2 0.000040094 192.168.1.2 192.168.1.1 ICMP 1514 Echo (ping) reply id=0x0789, seq=23/5888, ttl=64 (request in 1)
> 
> From the host:
> 
> No. Time Source Destination Protocol Length Info
> 1 0.000000000 192.168.1.2 192.168.1.1 ICMP 1514 Echo (ping) request id=0x0002, seq=8/2048, ttl=64 (reply in 2)
> 2 0.000391800 192.168.1.1 192.168.1.2 ICMP 1514 Echo (ping) reply id=0x0002, seq=8/2048, ttl=64 (request in 1)
> 
> If I go over that limit, it fragments the packet as expected.

Could you run the shell command that sweeps over the entire range, fromhere?
https://lore.kernel.org/netdev/20231030222035.oqos7v7sdq5u6mti@skbuf/