Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753493AbdDCSOM (ORCPT ); Mon, 3 Apr 2017 14:14:12 -0400 Received: from mail-io0-f195.google.com ([209.85.223.195]:35709 "EHLO mail-io0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753423AbdDCSOK (ORCPT ); Mon, 3 Apr 2017 14:14:10 -0400 MIME-Version: 1.0 In-Reply-To: <92fb1e4a-d6df-f55b-c0a1-9c1eb78e3943@longlandclan.id.au> References: <20170401222119.25106-1-nicolas.pitre@linaro.org> <87pogur0y9.fsf@firstfloor.org> <92fb1e4a-d6df-f55b-c0a1-9c1eb78e3943@longlandclan.id.au> From: Geert Uytterhoeven Date: Mon, 3 Apr 2017 20:14:08 +0200 X-Google-Sender-Auth: 9KbcYFIgLAZpVOwuYhAC1chKkcs Message-ID: Subject: Re: [PATCH v2 0/5] minitty: a minimal TTY layer alternative for embedded systems To: Stuart Longland Cc: Nicolas Pitre , Andi Kleen , Greg Kroah-Hartman , Jiri Slaby , "linux-serial@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1143 Lines: 27 On Mon, Apr 3, 2017 at 12:44 AM, Stuart Longland wrote: > On 03/04/17 07:41, Nicolas Pitre wrote: >>> No PTYs seems like a big limitation. This means no sshd? >> Again, my ultimate system target is in the sub-megabyte of RAM. I >> really doubt you'll be able to fit an SSH server in there even if PTYs >> were supported, unless sshd (or dropbear) can be made really tiny. >> Otherwise you most probably have sufficient resources to run the regular >> TTY code. > > Are we talking small microcontrollers here? The smallest machine in > terms of RAM I ever recall running Linux on was a 386SX/25 MHz with 4MB > RAM, and that had a MMU. Let's halve that. I once tried and ran Linux in 2 MiB, incl. X, twm, and xterm. Of course with swap enabled. And swapping like hell. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds