netdev - Re: [PATCH v2 net-next] net: no longer support SOCK_REFCNT

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Date:   Wed, 15 Feb 2023 09:34:16 +0100
From:   Eric Dumazet <edumazet@...gle.com>
To:     Jason Xing <kerneljasonxing@...il.com>
Cc:     kuniyu@...zon.com, davem@...emloft.net, kuba@...nel.org,
        pabeni@...hat.com, dsahern@...nel.org,
        matthieu.baerts@...sares.net, willemdebruijn.kernel@...il.com,
        nhorman@...driver.com, marcelo.leitner@...il.com,
        lucien.xin@...il.com, kgraul@...ux.ibm.com, wenjia@...ux.ibm.com,
        jaka@...ux.ibm.com, bjorn@...nel.org, magnus.karlsson@...el.com,
        maciej.fijalkowski@...el.com, jonathan.lemon@...il.com,
        bpf@...r.kernel.org, linux-s390@...r.kernel.org,
        linux-sctp@...r.kernel.org, mptcp@...ts.linux.dev,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jason Xing <kernelxing@...cent.com>
Subject: Re: [PATCH v2 net-next] net: no longer support SOCK_REFCNT_DEBUG feature

On Tue, Feb 14, 2023 at 5:15 AM Jason Xing <kerneljasonxing@...il.com> wrote:
>
> From: Jason Xing <kernelxing@...cent.com>
>
> Commit e48c414ee61f ("[INET]: Generalise the TCP sock ID lookup routines")
> commented out the definition of SOCK_REFCNT_DEBUG in 2005 and later another
> commit 463c84b97f24 ("[NET]: Introduce inet_connection_sock") removed it.
> Since we could track all of them through bpf and kprobe related tools
> and the feature could print loads of information which might not be
> that helpful even under a little bit pressure, the whole feature which
> has been inactive for many years is no longer supported.
>
> Link: https://lore.kernel.org/lkml/20230211065153.54116-1-kerneljasonxing@gmail.com/
> Suggested-by: Kuniyuki Iwashima <kuniyu@...zon.com>
> Signed-off-by: Jason Xing <kernelxing@...cent.com>
>

Reviewed-by: Eric Dumazet <edumazet@...gle.com>