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 09FFD314A6B; Mon, 26 Jan 2026 10:30:48 +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=1769423449; cv=none; b=XRNAiGV+4MSKNmFdwuIBaPMI1s0SQKAyHUQBpjkR5tuj0VF4DnTg4h/UxYLd5JzK+3ACtuSeig/PVZjhnYabBot2ZygceZ8d1PlBRPx+zrF5NFIPG9dZBtmWz4XUr24xNNjHdbd9HZ4ZVpiwlGI49CFJPfOZWTBPwXtEjC2kdlI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769423449; c=relaxed/simple; bh=DZpUj0XgjraMHp5fVE1GchTKj9SFKXHE6u8Z2fyXQEo=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=CO5R1qpWQ0WRUJDkPG7EpXWdzPXV4jhoAZnOfqkAoMeK/uee/KGsVSHO56tzRC3YV5DQZy04DS96D6gsGO/IW+CgFhhqxOmypDyQjHGtfdGQMzEUaOfh6RkNzLb7xr/VBawiAEJoQjrNXjtV2n7sW75R9t6Qf+1JXFPkUe8Xmfc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=URyiRCs2; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="URyiRCs2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 976A9C116C6; Mon, 26 Jan 2026 10:30:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1769423448; bh=DZpUj0XgjraMHp5fVE1GchTKj9SFKXHE6u8Z2fyXQEo=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=URyiRCs2RPsy/aq/sYKt0laQYAv+B6u0OtE7JdatU7mFbmvbWuBEbZ/vc9kPbjgsk dOKGKDDU2CRUCnIAUER3s2Kn+STcecRHwPT9YldH9sn+owwoX/qb6H04o++xVNCWum wRboxf/NMW9f1eKkWx5c6/HwMuG/ZuuP+gWq0+84= Date: Mon, 26 Jan 2026 11:30:44 +0100 From: Greg Kroah-Hartman To: Jocelyn Falempe Cc: Jiri Slaby , Nicolas Pitre , Calixte Pernot , linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org Subject: Re: [PATCH] vt: Add enable module parameter Message-ID: <2026012659-credit-suing-72ce@gregkh> References: <20260126092234.713465-1-jfalempe@redhat.com> <2026012613-cotton-jellied-b67a@gregkh> <48be84fb-bee4-4a22-bde4-0d0c78282f80@redhat.com> <2026012648-vantage-mummified-2a43@gregkh> Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <2026012648-vantage-mummified-2a43@gregkh> On Mon, Jan 26, 2026 at 11:20:21AM +0100, Greg Kroah-Hartman wrote: > On Mon, Jan 26, 2026 at 10:43:35AM +0100, Jocelyn Falempe wrote: > > On 26/01/2026 10:33, Greg Kroah-Hartman wrote: > > > On Mon, Jan 26, 2026 at 10:21:50AM +0100, Jocelyn Falempe wrote: > > > > This allows to build the kernel with CONFIG_VT enabled, and choose > > > > on the kernel command line to enable it or not. > > > > > > This says what is happening, but not why? > > > > > > > Add vt.enable=1 to force enable, or vt.enable=0 to force disable. > > > > > > Why are we using a 1990's technology for a new feature? What is this > > > going to allow to have happen? Who needs/wants this? Who will use it? > > > For what? > > > > The goal is to ease the transition to disable CONFIG_VT. > > > > So if this is merged, you can boot without VT on any Linux distribution, > > without rebuilding the kernel. > > But that's a distro-specific thing, the distro should be enabling or > disabling the option as it needs, it should not be a user-configurable > boot-time selection option as userspace depends entirely on this either > being there or not. Why would you have a kernel with both options but > userspace without that? And to follow-up on this, if a distro wanted to support this, why not just provide 2 different kernel images? One with this enabled and one without? It's up to the distro to support such a thing, not the kernel community, right? thanks, greg k-h