netdev - Re: [PATCH 3/4] net-next: frags: add inetpeer frag

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Message-ID: <20220911115447.GA101734@debian>
Date:   Sun, 11 Sep 2022 13:54:52 +0200
From:   Richard Gobert <richardbgobert@...il.com>
To:     Eric Dumazet <edumazet@...gle.com>
Cc:     David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Jonathan Corbet <corbet@....net>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        David Ahern <dsahern@...nel.org>,
        Alexander Aring <alex.aring@...il.com>,
        Stefan Schmidt <stefan@...enfreihafen.org>,
        Pablo Neira Ayuso <pablo@...filter.org>,
        Jozsef Kadlecsik <kadlec@...filter.org>,
        Florian Westphal <fw@...len.de>,
        Martin KaFai Lau <kafai@...com>,
        netdev <netdev@...r.kernel.org>,
        "open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>, linux-wpan@...r.kernel.org,
        netfilter-devel@...r.kernel.org, coreteam@...filter.org
Subject: Re: [PATCH 3/4] net-next: frags: add inetpeer frag_mem tracking

On Thu, Sep 01, 2022 at 09:06:59AM -0700, Eric Dumazet wrote:
> It can be disabled if needed, by changing ipfrag_max_dist sysctl.

I understand your reluctance to add another dependency on inetpeer.

> Quite frankly IPv4 reassembly unit is a toy, I am always surprised
> some applications are still relying on IP fragments.

Do you think there's any room for improvement in IP fragments? I
believe that it is possible to make frags less fragile and prone
to overload in real-world scenarios.