Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
MIME-Version: 1.0
References: <20191206020153.228283-1-brendanhiggins@google.com>
 <20191206020153.228283-2-brendanhiggins@google.com> <f217945d-ab64-10cc-bb12-3a4d810ff25a@cambridgegreys.com>
 <CAFd5g45cSKATfw4GKPw6QdhQKDNi=0gcDRjQ7N0T1XrdtSTPrg@mail.gmail.com>
 <20191207012108.GA220741@google.com> <15f048d3-07ab-61c1-c6e0-0712e626dd33@cambridgegreys.com>
 <CAFd5g448yZ5nSVLnN0gvsv3jLnhWG+dzJgvH1jdV+s2eTq4wxg@mail.gmail.com>
 <1785498655.111829.1575936178298.JavaMail.zimbra@nod.at> <87f182c6-82a3-d696-72e4-ddaa781a655b@cambridgegreys.com>
In-Reply-To: <87f182c6-82a3-d696-72e4-ddaa781a655b@cambridgegreys.com>
From:   Brendan Higgins <brendanhiggins@google.com>
Date:   Tue, 10 Dec 2019 14:40:24 -0800
Message-ID: <CAFd5g46osmFBka0X60A+_mmetpreG+abnh_+GQmVrr+PPxrqxg@mail.gmail.com>
Subject: Re: [RFC v1 1/2] um: drivers: remove support for UML_NET_PCAP
To:     Anton Ivanov <anton.ivanov@cambridgegreys.com>
Cc:     Richard Weinberger <richard@nod.at>,
        davidgow <davidgow@google.com>, Jeff Dike <jdike@addtoit.com>,
        linux-um <linux-um@lists.infradead.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Johannes Berg <johannes.berg@intel.com>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Mon, Dec 9, 2019 at 11:14 PM Anton Ivanov
<anton.ivanov@cambridgegreys.com> wrote:
>
> On 10/12/2019 00:02, Richard Weinberger wrote:
> > ----- Urspr=C3=BCngliche Mail -----
> >> Von: "Brendan Higgins" <brendanhiggins@google.com>
> >>> IMHO we should at least mark them as "obsolete" and start preparing t=
o
> >>> remove them.
> >>
> >> Alright, I will send a patch out which marks the other network drivers
> >> as "obsolete".
> >>
> >> Clarification: Should I mark all UML network devices as "obsolete"
> >> except for NET_VECTOR? Daemon and MCAST looked to me (I am not a
> >> networking expert), like they might not be covered by vector.
> >
> > No. Why?
> >
> > Thanks,
> > //richard
> >
> > _______________________________________________
> > linux-um mailing list
> > linux-um@lists.infradead.org
> > http://lists.infradead.org/mailman/listinfo/linux-um
> >
> At least pcap and vde are maintenance issues. They do not even build toda=
y.
>
> Off the top of my head, daemon needs fixes to the switch - it has an
> O(n) performance hit for n=3D"number of ports" as well as a few other iss=
ues.
>
> Tap has a fully functional replacement
>
> Pcap has a fully functional replacement
>
> mcast for 2 instances is functionally equivalent to running l2tp or gre
> back-to-back.
>
> IMHO we can start marking some of them as obsolete.

It looked to me like this discussion is ongoing; however, it seemed
like the discussion might be boiling down to *which* drivers should be
marked obsolete, so I decided to go ahead and send a patch which marks
everything as deprecated. I figured it would make it easier to focus
the conversation on what, if anything, should be marked obsolete:

https://lore.kernel.org/lkml/20191210223403.244842-1-brendanhiggins@google.=
com/T/#u

Also, Anton, I flat out stole a bunch of your comments on this thread
to make my commit message. Just respond with the appropriate tags
(co-developed-by, etc) if you want to be credited for them. As it is,
I marked you as "suggested-by".

Cheers!