From: Sabrina Dubroca <sd@queasysnail•net>
To: Arnd Bergmann <arnd@arndb•de>
Cc: "Kolbjørn Barmen" <linux-m68k@kolla•no>,
"Krzysztof Kozlowski" <krzk@kernel•org>,
"Fernando Fernandez Mancera" <fmancera@suse•de>,
Netdev <netdev@vger•kernel.org>,
linux-kernel@vger•kernel.org,
"Geert Uytterhoeven" <geert@linux-m68k•org>,
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Subject: Re: [PATCH 01/10 net-next] ipv6: convert CONFIG_IPV6 to built-in only and clean up Kconfigs
Date: Tue, 10 Mar 2026 21:35:16 +0100 [thread overview]
Message-ID: <abCAhAh5VnrnY0_i@krikkit> (raw)
In-Reply-To: <5c4b6043-a484-479d-83bc-a86ecdb8f810@app.fastmail.com>
2026-03-10, 20:58:15 +0100, Arnd Bergmann wrote:
> On Tue, Mar 10, 2026, at 20:40, Kolbjørn Barmen wrote:
> > On Mon, 9 Mar 2026, Krzysztof Kozlowski wrote:
> >> On 09/03/2026 03:19, Fernando Fernandez Mancera wrote:
> >>
> >> It must stay module for me. Alternatively, drop it, but then some users
> >> will be really affected.
> >
> > I agree. If anything I would prefer to see IPv4 be made optional (and
> > modular) as well, and not as something IPv6 depends on, it's (AFAIK)
> > impossible today to build an IPv6-only Linux kernel.
>
[...]
> For optional IPv4 support, I would expect that it's possible
> to make it a loadable module, with a significant amount of
> work and little benefit. Loading an ipv6 module without also
> loading ipv4 sounds completely unrealistic though, given
> the way the code is structured today.
I played with building IPv6-only kernels some years ago. It was
possible (at least for the reduced config I was using as a start), but
yes, a fair amount of investigation and churn, to find all the IPv4
common code and turn it into "generic" common code.
IPv4 as a module would get us in the same mess with have with IPv6,
let's not do that.
But even IPV4=n, I abandonned the idea because of the work/churn vs
benefit ratio.
--
Sabrina
next prev parent reply other threads:[~2026-03-10 20:35 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-09 2:19 [PATCH 00/10 net-next] Convert CONFIG_IPV6 to built-in and remove stubs Fernando Fernandez Mancera
2026-03-09 2:19 ` [PATCH 01/10 net-next] ipv6: convert CONFIG_IPV6 to built-in only and clean up Kconfigs Fernando Fernandez Mancera
2026-03-09 10:24 ` Krzysztof Kozlowski
2026-03-10 19:40 ` Kolbjørn Barmen
2026-03-10 19:58 ` Arnd Bergmann
2026-03-10 20:35 ` Sabrina Dubroca [this message]
2026-03-10 21:18 ` Bjørn Mork
2026-03-10 22:18 ` Arnd Bergmann
2026-03-11 8:21 ` Geert Uytterhoeven
2026-03-09 2:19 ` [PATCH 02/10 net-next] ipv6: replace IS_BUILTIN(CONFIG_IPV6) with IS_ENABLED(CONFIG_IPV6) Fernando Fernandez Mancera
2026-04-01 12:52 ` David Woodhouse
2026-03-09 2:19 ` [PATCH 03/10 net-next] ipv6: remove dynamic ICMPv6 sender registration infrastructure Fernando Fernandez Mancera
2026-03-09 2:19 ` [PATCH 04/10 net-next] ipv6: prepare headers for ipv6_stub removal Fernando Fernandez Mancera
2026-03-09 2:19 ` [PATCH 05/10 net-next] drivers: net: drop ipv6_stub usage and use direct function calls Fernando Fernandez Mancera
2026-03-09 2:19 ` [PATCH 06/10 net-next] ipv4: " Fernando Fernandez Mancera
2026-03-09 2:19 ` [PATCH 07/10 net-next] net: convert remaining ipv6_stub users to " Fernando Fernandez Mancera
2026-03-09 2:19 ` [PATCH 08/10 net-next] bpf: remove ipv6_bpf_stub completely and use " Fernando Fernandez Mancera
2026-03-09 2:19 ` [PATCH 09/10 net-next] ipv6: remove ipv6_stub infrastructure completely Fernando Fernandez Mancera
2026-03-09 2:19 ` [PATCH 10/10 net-next] netfilter: remove nf_ipv6_ops and use direct function calls Fernando Fernandez Mancera
2026-03-09 10:22 ` [PATCH 00/10 net-next] Convert CONFIG_IPV6 to built-in and remove stubs Krzysztof Kozlowski
2026-03-09 10:26 ` Krzysztof Kozlowski
2026-03-09 23:18 ` Jakub Kicinski
2026-03-10 20:02 ` Krzysztof Kozlowski
2026-03-10 21:42 ` Jakub Kicinski
2026-03-10 22:15 ` Fernando Fernandez Mancera
2026-03-09 11:33 ` David Woodhouse
2026-03-09 11:38 ` Fernando Fernandez Mancera
2026-03-09 12:43 ` Krzysztof Kozlowski
2026-03-09 12:58 ` Daniel Borkmann
2026-03-09 13:02 ` Krzysztof Kozlowski
2026-03-09 13:14 ` Fernando Fernandez Mancera
2026-03-16 10:24 ` Lorenzo Stoakes (Oracle)
2026-03-16 10:33 ` Krzysztof Kozlowski
2026-03-16 10:50 ` Lorenzo Stoakes (Oracle)
2026-03-16 10:58 ` Krzysztof Kozlowski
2026-03-16 11:10 ` Vlastimil Babka
2026-03-16 11:17 ` Krzysztof Kozlowski
2026-03-09 13:07 ` Fernando Fernandez Mancera
2026-03-09 14:47 ` Jakub Kicinski
2026-03-09 15:10 ` Fernando Fernandez Mancera
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