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[23.128.96.18]) by mx.google.com with ESMTP id z3si6088279edp.327.2021.01.10.10.18.57; Sun, 10 Jan 2021 10:19:21 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726723AbhAJSQp convert rfc822-to-8bit (ORCPT + 99 others); Sun, 10 Jan 2021 13:16:45 -0500 Received: from mout.kundenserver.de ([217.72.192.74]:47291 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726250AbhAJSQp (ORCPT ); Sun, 10 Jan 2021 13:16:45 -0500 Received: from linux-e202.suse.de ([87.156.29.153]) by mrelayeu.kundenserver.de (mreue106 [212.227.15.183]) with ESMTPSA (Nemesis) id 1Mr8O8-1kD0WB40Jy-00oGN1; Sun, 10 Jan 2021 19:12:38 +0100 From: Fabian Vogt To: Daniel Tang , Arnd Bergmann Cc: Linux ARM , Linux Kernel Mailing List , Krzysztof Adamski , Oleksij Rempel , Baruch Siach , Russell King - ARM Linux , Uwe =?ISO-8859-1?Q?Kleine=2DK=F6nig?= , Jamie Iles , Barry Song , Viresh Kumar , Linus Walleij , Jonas Jensen , Marc Gonzalez , Hartley Sweeten , Lubomir Rintel , Neil Armstrong , Shawn Guo , Alex Elder , Alexander Shiyan , Koen Vandeputte , Hans Ulli Kroll , Vladimir Zapolskiy , Wei Xu , Steven Rostedt , Yoshinori Sato , Mark Salter , Michael Ellerman , Geert Uytterhoeven , Thomas Bogendoerfer Subject: Re: Old platforms: bring out your dead Date: Sun, 10 Jan 2021 19:12:24 +0100 Message-ID: <1702853.1557dWfJA4@linux-e202.suse.de> In-Reply-To: References: <67171E13-6786-4B44-A8C2-3302963B055F@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT Content-Type: text/plain; charset="UTF-8" X-Provags-ID: V03:K1:FZfLnsMqM+HOkFR0A8Q+7hD0yEN6vJJp7umyK7UxHG2SFbYGYqe prdJag+bq2hU69eIOwNmBTT4vgJPuhGBNVxvuFE/d/xc3TK0NlHfYK3/AbsEtp7ERFWCgHh oeteavuGRbdJA8qmy3CJCrDABvp8xwdHwVTivZ83/VthdOYNS4VD8xikOz/5n7HaRM08BC0 Rh7tAL3GZueJ+hxcFuyVA== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:vSk/mHijXw4=:tQjamyoZ/Bl2bxHBtUPnQy Tf6sDTYDvd4imhZ+OoEbEKp6+Q57Ben7GYfkyK3KB14DEqrp166WQZDxzxcxFvTCxCJ+wITS8 y48uvjBfwbsOHcc4lxDaZu+kD8K1HWhWN8kIUbevevUOgTUxPkyxgvan+A0p0gWabG0YgoodA wNPmylbeRb4hwrsGhGdFBCdgjRgFPdIYD+Cd343vgd0nDKsiGh8xdDWurhiFtjX/JeOriQCLa rreNPrQ9rbrNmykF8ncUYShuoKFwepqP/Lpq3HJ60hSMH6Smx17vEw+hQgqamCM8OqVGnY/Z4 SidCTK+SMWopl6NWLbfZiptvng4HJQvO+T8lAo6ylN/YFXP6D3xlQYYEMyYvXSEtwyoh8WYUy xlJe5sqqiyNMjLDaOXMCbbACAhCpv+oo4nRuHFM8fDcLop3v18H9KSagb/sxBTUBu9zezY1tl xuTTsPGAQg== Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, Am Samstag, 9. Januar 2021, 23:20:48 CET schrieb Arnd Bergmann: > On Sat, Jan 9, 2021 at 1:06 AM Daniel Tang wrote: > > > > Hi Arnd, > > > > On 9 Jan 2021, at 9:55 am, Arnd Bergmann wrote: > > > > * nspire -- added in 2013, no notable changes after 2015 Most of the platform is just the DT sources and some small drivers around it, so it's actually fairly low maintenance. So far the migration away from panel-simple in 2019 (https://lore.kernel.org/linux-arm-kernel/20190805085847.25554-1-linus.walleij@linaro.org) was the biggest required change so far. > > I believe this is still in active use. I’ve CC’d Fabian into this thread who’s > > probably in a better position to respond to this. > > Ok, moving it to the "keep around for now list" as well, to be on the > safe side. Thanks! > Would either of you already have a guess for how long it makes > sense to update kernels on it? > > I see that this is one of the more limited platforms with just 32MB > of RAM (64MB in case of CX), and kernels only get more bloated over > time, so I expect at some point you will be stuck with running old > software. The kernel overhead isn't actually that bad. I just built today's 2ff90100ace8 and booted it with a busybox-based initrd. free -m reports: total used free shared buffers 58 12 46 0 0 Relatively speaking, still mostly unused ;-) The stock OS actually uses more! With 32MiB, the situation is definitely worse, but still manageable. Should that change in the future, dropping just the Classic/CM variants would be a possible option, but that still seems far enough away. > Wikipedia tells me that new models came out recently. Are you > planning to add support for those as well? Yes, someone from the community actually managed to boot Linux on a CX II-T, and I'm hoping to get that upstreamed soon. Most of the hardware changes are supported by drivers already and so this is mainly just another device tree. Cheers, Fabian > Arnd