From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752107AbbASQe7 (ORCPT ); Mon, 19 Jan 2015 11:34:59 -0500 Received: from mail-qa0-f44.google.com ([209.85.216.44]:34345 "EHLO mail-qa0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751448AbbASQe6 (ORCPT ); Mon, 19 Jan 2015 11:34:58 -0500 Message-ID: <54BD322F.1020401@hurleysoftware.com> Date: Mon, 19 Jan 2015 11:34:55 -0500 From: Peter Hurley User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 MIME-Version: 1.0 To: "Theodore Ts'o" CC: Howard Chu , Greg Kroah-Hartman , One Thousand Gnomes , Jiri Slaby , linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org Subject: Re: [PATCH] n_tty: Remove LINEMODE support References: <1421616632-4077-1-git-send-email-peter@hurleysoftware.com> <54BC2F0A.8040404@symas.com> <54BC3236.1030004@hurleysoftware.com> <54BC3730.706@symas.com> <54BC3C89.3070006@hurleysoftware.com> <20150119045501.GB29596@thunk.org> In-Reply-To: <20150119045501.GB29596@thunk.org> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Ted, On 01/18/2015 11:55 PM, Theodore Ts'o wrote: > Line mode goes back to BSD 4.x days, and it's useful over high latency > links --- i.e., the sort of thing that you get with stone age cellular > data networks (i.e., the sort of thing that we still have the US), > amateur packet radio links, etc. So it's certianly a nice to have, if > someone is willing to support it and the maintenance burden on the > rest of the tty stack isn't too onerous. I'm not philosophically opposed to Line mode support, but I am concerned about providing a userspace interface that's not getting tested or used or otherwise not fit for purpose. I copied you on the other email regarding the specific deficiencies so I won't reiterate them here. Perhaps it's fortunate that userspace didn't pick this up; otherwise, this interface would be cast in stone. Regards, Peter Hurley