linux-kernel - Re: Insanely high baud rates

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Message-ID: <20181011133134.085624af@alans-desktop>
Date:   Thu, 11 Oct 2018 13:31:34 +0100
From:   Alan Cox <gnomes@...rguk.ukuu.org.uk>
To:     hpa@...or.com
Cc:     linux-serial@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.com>, Johan Hovold <johan@...nel.org>,
        Alexander Viro <viro@...iv.linux.org.uk>
Subject: Re: Insanely high baud rates

> I'm mostly wondering if it is worth future-proofing for new transports. It sounds like we can have a consensus on leaving the upper 4 bits of the speed fields reserved, but leave the details of implementation for the future?

It seems reasonable, although I think the reality is that any future
transport is not going to be a true serial link, but some kind of serial
emulation layer. For those the speed really only matters to tell editors
and the like not to bother being clever.

I mean - what is the baud rate of a pty  ?

Alan