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b=dW4P4KEN98xvqUB/yYGNf4jjnqvr9O8IUweDcDCb7zRDkv8TYo0jyNCuxk5s0xFjyBwS7Y LUjlDyQiBm0BUIDQ== Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id 4F4853F6A7; Tue, 10 Mar 2026 22:15:19 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id MYAzEPeXsGkyeQAAD6G6ig (envelope-from ); Tue, 10 Mar 2026 22:15:19 +0000 Message-ID: Date: Tue, 10 Mar 2026 23:15:12 +0100 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 00/10 net-next] Convert CONFIG_IPV6 to built-in and remove stubs To: Jakub Kicinski , Krzysztof Kozlowski Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, davem@davemloft.net, edumazet@google.com, pabeni@redhat.com, horms@kernel.org, dsahern@kernel.org References: <20260309022013.5199-1-fmancera@suse.de> <48ccec3f-dbc8-45c8-afda-e4f7e8f150d6@kernel.org> <20260309161826.46074d55@kernel.org> <411bcf03-5993-478d-9809-3e04567ff09a@kernel.org> <20260310144225.46501657@kernel.org> Content-Language: en-US From: Fernando Fernandez Mancera In-Reply-To: <20260310144225.46501657@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Action: no action X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Spamd-Result: default: False [-4.51 / 50.00]; BAYES_HAM(-3.00)[99.99%]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FUZZY_RATELIMITED(0.00)[rspamd.com]; ARC_NA(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_TRACE(0.00)[0:+]; FROM_HAS_DN(0.00)[]; RCVD_TLS_ALL(0.00)[]; DKIM_TRACE(0.00)[suse.de:+]; RCVD_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; TO_DN_SOME(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCPT_COUNT_SEVEN(0.00)[9]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,imap1.dmz-prg2.suse.org:rdns] X-Rspamd-Queue-Id: D5FE65BDEE X-Spam-Flag: NO X-Spam-Score: -4.51 X-Spam-Level: On 3/10/26 10:42 PM, Jakub Kicinski wrote: > On Tue, 10 Mar 2026 21:02:40 +0100 Krzysztof Kozlowski wrote: >>> 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. >> >> Yes, Ubuntu for that reasons does not have it even as module. >> >> This should be used as *the* argument for these changes. > > Completely fair, the submission is severely lacking in motivation > and impact analysis :( > Yes it is. Sorry. I did handle that partially on v2 but will included as much arguments as possible in v3 and greater. Thanks, Fernando.