From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 75016C4742C for ; Sat, 31 Oct 2020 15:03:11 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id C9E09208B6 for ; Sat, 31 Oct 2020 15:03:10 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C9E09208B6 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=csgroup.eu Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id D98C96B0036; Sat, 31 Oct 2020 11:03:09 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id D49986B005C; Sat, 31 Oct 2020 11:03:09 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C11A76B005D; Sat, 31 Oct 2020 11:03:09 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0245.hostedemail.com [216.40.44.245]) by kanga.kvack.org (Postfix) with ESMTP id 937996B0036 for ; Sat, 31 Oct 2020 11:03:09 -0400 (EDT) Received: from smtpin12.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 2FA678249980 for ; Sat, 31 Oct 2020 15:03:09 +0000 (UTC) X-FDA: 77432538498.12.sugar97_1804a762729f Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin12.hostedemail.com (Postfix) with ESMTP id 14C961800A68C for ; Sat, 31 Oct 2020 15:03:09 +0000 (UTC) X-HE-Tag: sugar97_1804a762729f X-Filterd-Recvd-Size: 4635 Received: from pegase1.c-s.fr (pegase1.c-s.fr [93.17.236.30]) by imf28.hostedemail.com (Postfix) with ESMTP for ; Sat, 31 Oct 2020 15:03:08 +0000 (UTC) Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 4CNj930Clbz9vCxd; Sat, 31 Oct 2020 16:03:03 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at c-s.fr Received: from pegase1.c-s.fr ([192.168.12.234]) by localhost (pegase1.c-s.fr [192.168.12.234]) (amavisd-new, port 10024) with ESMTP id McRUnAiLxW8A; Sat, 31 Oct 2020 16:03:02 +0100 (CET) Received: from vm-hermes.si.c-s.fr (vm-hermes.si.c-s.fr [192.168.25.253]) by pegase1.c-s.fr (Postfix) with ESMTP id 4CNj925qDJz9vCxc; Sat, 31 Oct 2020 16:03:02 +0100 (CET) Received: by vm-hermes.si.c-s.fr (Postfix, from userid 33) id 41AC91774; Sat, 31 Oct 2020 16:05:39 +0100 (CET) Received: from 37-170-67-121.coucou-networks.fr (37-170-67-121.coucou-networks.fr [37.170.67.121]) by messagerie.c-s.fr (Horde Framework) with HTTP; Sat, 31 Oct 2020 16:05:39 +0100 Date: Sat, 31 Oct 2020 16:05:39 +0100 Message-ID: <20201031160539.Horde.n5yNbG9LoUSWqtuPQW_h3w1@messagerie.c-s.fr> From: Christophe Leroy To: Arnd Bergmann Cc: "David S. Miller" , Daniel Bristot de Oliveira , Andrew Morton , Paul Mackerras , Daniel Vetter , Arnd Bergmann , LKML , Vineet Gupta , Max Filippov , Nick Hu , Thomas Bogendoerfer , Michal Simek , Chris Zankel , Linux ARM , Dietmar Eggemann , Thomas Gleixner , Greentime Hu , Steven Rostedt , linuxppc-dev , Paul McKenney , Ard Biesheuvel , "open list:SYNOPSYS ARC ARCHITECTURE" , Mel Gorman , David Airlie , Christoph Hellwig , linux-csky@vger.kernel.org, Russell King , the arch/x86 maintainers , Herbert Xu , Vincent Guittot , linux-arch , Ingo Molnar , Vincent Chen , linux-sparc , Matthew Wilcox , Guo Ren , Linux-MM , Ben Segall , "open list:BROADCOM NVRAM DRIVER" , Sebastian Andrzej Siewior , Peter Zijlstra , linux-xtensa@linux-xtensa.org, Juri Lelli , Linus Torvalds Subject: Re: [patch V2 00/18] mm/highmem: Preemptible variant of kmap_atomic & friends References: <20201029221806.189523375@linutronix.de> <87pn50ob0s.fsf@nanos.tec.linutronix.de> <87blgknjcw.fsf@nanos.tec.linutronix.de> <87sg9vl59i.fsf@nanos.tec.linutronix.de> In-Reply-To: User-Agent: Internet Messaging Program (IMP) H5 (6.2.3) Content-Type: text/plain; charset=UTF-8; format=flowed; DelSp=Yes MIME-Version: 1.0 Content-Disposition: inline X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: > There are also some users on 10+ year old 32-bit netbooks or > business laptops, both x86 and Apple G4. > The longest-lived 32-bit embedded systems with large memory > (other than Arm) are probably NXP QorIQ P20xx/P40xx used in > military VME bus systems, and low-end embedded systems based > on Vortex86. > I'm less worried about all of these because upstream kernel > support for ppc32 and x86-32 is already bitrotting and they will > likely get stuck on the last working kernel before the > TI/Renesas/NXP Arm systems do. > Upstream kernel support for ppc32 is bitrotting, seriously ? What do you mean exactly ? ppc32 is actively supported, with recent addition of support of hugepages, kasan, uaccess protection, VMAP stack, etc ... Christophe