Received: by 2002:ad5:474a:0:0:0:0:0 with SMTP id i10csp1032495imu; Thu, 13 Dec 2018 08:19:54 -0800 (PST) X-Google-Smtp-Source: AFSGD/U4YLOWzKHarbs9Clu1CP9YemLXmBDDyGYwq1Cz29oDs0L1Tp0cQJpArhFfHFWoEevAGvuu X-Received: by 2002:a17:902:f44:: with SMTP id 62mr24511437ply.38.1544717994614; Thu, 13 Dec 2018 08:19:54 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1544717994; cv=none; d=google.com; s=arc-20160816; b=wFG6TgALxvEAPLwkJnAuQSYjfAe4ld0zZUWdXQvkRXYzTZOZ7tZya/Mes9nyR1+eWT ++/K8+ojsVeAlwZ8NdioZCuKCeUS/NlSEKJO6wEGI1DPJtfoKVQMQ2rTiwMFPd+TfGPo HL5PcmcPhhXukg1SVDkcCs2TAFBlxrDbUcHb0uCGwWLipp4VhSqpjQjLYbBgGaiWsHXM 4apoyh+TjR4m+/7FEtkv08dXh2mX4n/ZPtxv+BaAYlJocUi3RaScyfFs1gJ+kgXLhbtZ OQmvJYXy48RKxuP7BiTF4VHxfiQTdIRpdIOaXbgNw1mf+G4fJKrF4+/vLXvknBOngGOd B/mA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:to:subject:message-id:date:from:reply-to :mime-version:dkim-signature; bh=3mEpdag4bGOhH2Q+HoSOgaAiuwcIxDYQ11QIwtVm9fU=; b=I3KII2RWSk6XaJrZrnYeiNlNAe54cYVZKz5n8WosDzGEgBQGTeIlpdiK15Bg2EuZc/ fSOUHJGrlG7gcRHpJP7MXtVRIweHR/ytojwNo1b8psKWocu1wkqVMB6PtY+v3g9kq9zt jM3wJE7Xd9qlDqkbgNayESYhXnE2i0HorFdigLwwsQtvvNifoDzECVT6yJPhZ2XP8AL1 zV2CpBKxfkwiZsd5NBUBulci3nwow7+vE4ltBjsvW8cUBHbXqp8u56osczFKOVIRvCnk PYgknCsNwvwxcOnz8p9Pekqi61JJpcoUaX1FqHSVTBaI3JQ8GP9ja8BG6fg0xLVrZGSt SmoQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=sYZgQbSt; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id l7si1849099pgk.169.2018.12.13.08.19.29; Thu, 13 Dec 2018 08:19:54 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=sYZgQbSt; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728186AbeLMQRd (ORCPT + 99 others); Thu, 13 Dec 2018 11:17:33 -0500 Received: from mail-ua1-f67.google.com ([209.85.222.67]:37838 "EHLO mail-ua1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727428AbeLMQRd (ORCPT ); Thu, 13 Dec 2018 11:17:33 -0500 Received: by mail-ua1-f67.google.com with SMTP id u19so908680uae.4 for ; Thu, 13 Dec 2018 08:17:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:reply-to:from:date:message-id:subject:to; bh=3mEpdag4bGOhH2Q+HoSOgaAiuwcIxDYQ11QIwtVm9fU=; b=sYZgQbSt0XgmQxfv5MD4pzSGO3c9vgnZlz8572lWlallRf1hdevmOl1aTNWH+v5Wqf 2XiPZ4mcFaFYWsZaGvKDn8RRsmCYOysmz6svTerV27hbSAUjNxbLXKEHysjvajN9O7s9 081YBg+10adanEjHCs3FW/hMC3QvbnThHM1fja+ZBLgLQABJGY4h9jZFrdcQisNLb5po ruwnrtgZA3fmgnXJyIZv2mdh/brg4EvqeyLOSGM5R3UFZc87u3eRmHlk2UhL8gtwIlU8 QmPZ577xdEcEYJHZ2nT2pQRidf4FnZsehVnaN4+0eOV8vsPzdrBtLgP0sKiG6dhQWC1I UbJQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:reply-to:from:date:message-id :subject:to; bh=3mEpdag4bGOhH2Q+HoSOgaAiuwcIxDYQ11QIwtVm9fU=; b=tgfHI8blljIOhA+602d6VKeEoLwAomDN6Y8TWOv1+0Pgu5LSHX8hXhAGLqYvDFQ7rw 3jq7LCcx3HdMo1l+qwH/aY61ycsxQUUQS5nrpoGz/JuNOyF/kQdzwYZMizkD9KSnUJ70 Q+8/RJBP7Enupl2jOqvp85+Oo8m9I8lYmwPi6WITw0wW4wXz+dMKd1lge5+kW1jUBmhG DwyxE5ygthppTtx7d3PDCOV75fgjF4VmihxfPVebwKn9FfBoFOvX3wgr51wCTdDuFV0Q D5qE7sQ4akAqiL6mQYz7JWUHWsc5A22vIYNJ/USCJXR9w/BlpBxDMrOehgKj1Xk15VaU Rw/Q== X-Gm-Message-State: AA+aEWawVAmFiiVTJdJV+6m+957vHPwG8JstE4k/29ECpP9Jg4qD5ZKu w69k1ECvQSQ5Og1MBCZvzS8QDpaWxByzLu1JSilA/ng= X-Received: by 2002:ab0:1425:: with SMTP id b34mr11199299uae.64.1544717851708; Thu, 13 Dec 2018 08:17:31 -0800 (PST) MIME-Version: 1.0 Reply-To: whiteheadm@acm.org From: tedheadster Date: Thu, 13 Dec 2018 11:17:19 -0500 Message-ID: Subject: Re: Can we drop upstream Linux x32 support? To: Linux Kernel Mailing List Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I will also complain. I use the 32 bit x86 environment regularly for testing. I have found several bugs and worked with upstream developers to create fixes. The developers never said anything like "this is a waste of time because it was found on 32 bit". Instead, they were universally supportive. As an example, Thomas Gleixner said that the problem we found would only show up on older hardware, and he affirmed that it was a bug that certainly needed to be fixed ("NOHZ: Check for nohz active instead of nohz enabled"). I actually think this is an _opportunity_ to engage aspiring kernel programmers. Give them some guidance and have them actively test and do simple maintenance of 32 bit x86. Yes, I am prepared to take the lead on this if it is something you want to pursue. - Matthew Whitehead