From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 490943375AA; Tue, 10 Mar 2026 21:42:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773178947; cv=none; b=HRsbMgg+7k22248EJOctEjSDrf+DoiF9HXEuTtYkx443Y1zaJdpbmUQ1KCx+OrecXglIc5aEDBIYEHLzLI6qZQa8+wc5WOLGr/q1+WGrQC6+oZhxhLKD7DFVqtMUCXqvDOfJ8qSdTJ8z9L1NdjmO1ad9cROUTePpxwNBjpft7zE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773178947; c=relaxed/simple; bh=sMDkgyCiwcQcFG/IS+8zt4O6+QmcSTnnqcmooA0MlUI=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=mV6hWDIrhMdRj4E3HGn5PGE03CQF3ozLOYsRJHHix7d7By2LcMzW1h8NZl1FjDKGPGGTbeTC/sT6R1T/wvuRO+j5wZ/Sob92+zUVesQYewpsVcQqy5f1grkjMFykom75H2/9bsc+DxrH4YHdHn+uPg2+nxeME382gRO/pOw9xHo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Qre9doRU; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Qre9doRU" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 99DDBC19423; Tue, 10 Mar 2026 21:42:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773178947; bh=sMDkgyCiwcQcFG/IS+8zt4O6+QmcSTnnqcmooA0MlUI=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=Qre9doRUAZfl7IsLZYgWmK4ZOEWZ+9p+o1AYKArTbYPc+q9WtjOz9PDJzsQiu1BPf l90M+ZQ3ygsgqs9mHHggWBCasEX1pteRCASZr0qgWlM8f8webc2eOtyHKvO0pn2CTG KZffiKNhJVmhqZhwvRGS6JwpoJep4F2/DsvNi3pA6LHXJ5oS0B5QHnqM2+mpV74GdU mwnjHkh171UMhHwFuDmvndU87de03hNKRVU0w8Mizubn2+gKTnbQhsYSYy6+La6+Fs jwhYkoiLbe1/FfBNqGqSpqAH4MJS58/z1iF+lR6yRsZ4RMtS/OLp03/V+sxIpPYari ymqe0eVEpGGCA== Date: Tue, 10 Mar 2026 14:42:25 -0700 From: Jakub Kicinski To: Krzysztof Kozlowski Cc: Fernando Fernandez Mancera , 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 Message-ID: <20260310144225.46501657@kernel.org> In-Reply-To: <411bcf03-5993-478d-9809-3e04567ff09a@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> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit 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 :(