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Date:   Fri, 15 Feb 2019 07:54:53 -0800
From:   Eric Dumazet <edumazet@...gle.com>
To:     Yafang Shao <laoar.shao@...il.com>
Cc:     David Miller <davem@...emloft.net>,
        Daniel Borkmann <daniel@...earbox.net>,
        netdev <netdev@...r.kernel.org>, shaoyafang@...iglobal.com
Subject: Re: [net-next 5/5] net: sock: remove the definition of SOCK_DEBUG()

On Fri, Feb 15, 2019 at 7:42 AM Yafang Shao <laoar.shao@...il.com> wrote:
>
> On Fri, Feb 15, 2019 at 10:58 PM Eric Dumazet <edumazet@...gle.com> wrote:
> >
> > On Fri, Feb 15, 2019 at 6:50 AM Yafang Shao <laoar.shao@...il.com> wrote:
> > >
> > > As SOCK_DEBUG() isn't used any more, we can get ride of it now.
> > >
> >
> > No, we are still using this infrastructure from time to time.
> >
> > I told you I agreed to remove the current (obsolete) TCP call sites,
> >  I never suggested to remove SOCK_DEBUG() completely.
>
> All right, however I'm not persuaded by you.
> Because SOCK_DEBUG() is not a smart way for debugging, which requires
> the user code to be modified.
> We have other more flexible methords.

That might be the case, but only if you get enough privileges and skills.
I fail to see why we should enforce anything here.
It costs nothing having this interface kept.

In any case, we do not deprecate features without a
Documentation/ABI/obsolete/*  file
and quarantine.

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