From: Jakub Kicinski <kuba@kernel.org>
To: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Fernando Fernandez Mancera <fmancera@suse.de>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
davem@davemloft.net, edumazet@google.com, pabeni@redhat.com,
horms@kernel.org, dsahern@kernel.org
Subject: Re: [PATCH 00/10 net-next] Convert CONFIG_IPV6 to built-in and remove stubs
Date: Mon, 9 Mar 2026 16:18:26 -0700 [thread overview]
Message-ID: <20260309161826.46074d55@kernel.org> (raw)
In-Reply-To: <f4598201-2115-43e3-9da8-22583ae67db2@kernel.org>
On Mon, 9 Mar 2026 11:26:08 +0100 Krzysztof Kozlowski wrote:
> Heh, I just checked, that's 6 MB module on arm64 which apparently you
> want to put into the kernel!
Pretty sure you get 6MB because you have DEBUG_INFO enabled?
IMO "I have full debug info but I care about kernel size" is
internally inconsistent.
Here is the top line of bloatometer without debug info:
add/remove: 1769/7 grow/shrink: 86/0 up/down: 374521/-228 (374293)
The vmlinux increases by 200kB with IPv6 built in.
Not a very dramatic increase.
Please note that opening any dual-stack socket will cause the IPv6
module to get loaded. And opening a dual-stack socket will fail if
IPv6 is blacklisted. So I find it quite hard to believe that other
that deeply embedded systems with custom configs there are systems
out there which don't end up with IPv6 loaded. Whether they have
a single IPv6 address configured or not.
And if we stop supporting =m we can actually turn a bunch of indirect
calls into static inlines so in practice the memory use on real system
will be lower!
Please be reasonable, this is objectively the right move.
next prev parent reply other threads:[~2026-03-09 23:18 UTC|newest]
Thread overview: 39+ 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
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
2026-03-09 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 [this message]
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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