Received: by 2002:a25:1506:0:0:0:0:0 with SMTP id 6csp3570229ybv; Sun, 16 Feb 2020 00:23:38 -0800 (PST) X-Google-Smtp-Source: APXvYqzPXWSvpK/S9JPxovXpnc6bOTT982BXy26gzoN9R9DVbSHyQFuJtKyk9wH62LGeiTuobdRJ X-Received: by 2002:aca:4f4c:: with SMTP id d73mr6899309oib.107.1581841418501; Sun, 16 Feb 2020 00:23:38 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1581841418; cv=none; d=google.com; s=arc-20160816; b=xKCCMHKSQdM0kQGEyAL52GGmDh3FZKGLKCu9p9SR4R2yX4mZEtLgSW0pXfG5BcXTpF Qk0fF4mou0CIM7cHevrnkGmstd/NPvcacNIiism2KIGUz7E4jdOU5l+AUarrp1aDlLKm qfV9tSEk476oe9S58pkhjBj70eAB0kDxhQCh6k95nWqK8EuceQszFDazdw0Z+rcPTDqF GCj0OigW5G+iUBJkQ06IcvxU9OmIvBfaorXLhrvoWpk6oC+3jMCWDFIwo1ScRYuTRJsx gQ795iuykhTlVyfkdcObLLXX1PAcyjiRdqy125K5SQZmDtkFF3X2zLbZgcf6ETzIDRQJ JOdg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:dkim-signature; bh=+8Uhu2wgUq8Ulq+yn7pGlyiEpl5L2cWMg1W6oSitXX8=; b=tUraHKO/fvPc7ybc+CsI8atDVFJu+AtEd3qxV8MVHLKbVcO5mrqUV63VaHPmhFZfp3 uqdSswF1lve7phsr3QMmbqIceQwGbDa0oO6bXC+yrFYsoq0cZjvJ4fJyk+sGxqeZPCy8 YAtjsBaHNJExnbHvB0aNjAGrNG8PLVLAEoELSE4iVDPAru0Fka3YklpcgfMPbcGpeoqB l0H2J6ATIwi6FaXJD+VMfurHrp9cSPbTC70CnsYIn/VWYsb6pQO47LcSKoGXpZJdu0K/ T8xrwV4mIWfKarhjgdNF+7cuxknUmLtm5wzBFcqslqc1yeyEcT72hFZ5e52Vwg2AxfkS CCUA== ARC-Authentication-Results: i=1; mx.google.com; dkim=fail (test mode) header.i=@armlinux.org.uk header.s=pandora-2019 header.b=eZ+pxZ5Q; 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=fail (p=NONE sp=NONE dis=NONE) header.from=armlinux.org.uk Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id t1si5346506oic.140.2020.02.16.00.23.26; Sun, 16 Feb 2020 00:23:38 -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=fail (test mode) header.i=@armlinux.org.uk header.s=pandora-2019 header.b=eZ+pxZ5Q; 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=fail (p=NONE sp=NONE dis=NONE) header.from=armlinux.org.uk Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726651AbgBPIXV (ORCPT + 99 others); Sun, 16 Feb 2020 03:23:21 -0500 Received: from pandora.armlinux.org.uk ([78.32.30.218]:44812 "EHLO pandora.armlinux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725899AbgBPIXU (ORCPT ); Sun, 16 Feb 2020 03:23:20 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=+8Uhu2wgUq8Ulq+yn7pGlyiEpl5L2cWMg1W6oSitXX8=; b=eZ+pxZ5QnjK4dWUII5qW9jbf8 eHQaXZHQb+St/fNO4odIF1+oXNFmG9JyWOQyfNVp/YnjMm8+v9aiI+5lsbrKHrZZMx/nek8Kqd5TP 2W8OtU17ICPE2UgLtdc9R5GSAIEv8D7oLBooYFlzt/1m+U1xt3Lrzg8xA2WrwUIRgXUZkmT5OSjiz v4iLBDbN3Jl9AzWwjfvTWiezYEvzjfDwRTq0N3FjcotV54dXrt1kPyxekt0I2b9RcgIp0XHoHzce1 5fM/0Ipqg2sO442zcz74Ifmz05LfxOSewibl5FPqzdimV68xwJR331lGU1QToFVHsC5S11UIPKhv/ xpuaPP69A==; Received: from shell.armlinux.org.uk ([2001:4d48:ad52:3201:5054:ff:fe00:4ec]:41020) by pandora.armlinux.org.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.90_1) (envelope-from ) id 1j3FCS-0001uE-Q8; Sun, 16 Feb 2020 08:22:49 +0000 Received: from linux by shell.armlinux.org.uk with local (Exim 4.92) (envelope-from ) id 1j3FCA-0005C0-Sx; Sun, 16 Feb 2020 08:22:30 +0000 Date: Sun, 16 Feb 2020 08:22:30 +0000 From: Russell King - ARM Linux admin To: Mike Rapoport Cc: linux-kernel@vger.kernel.org, Andrew Morton , Arnd Bergmann , Benjamin Herrenschmidt , Brian Cain , Catalin Marinas , Christophe Leroy , Fenghua Yu , Geert Uytterhoeven , Guan Xuetao , James Morse , Jonas Bonn , Julien Thierry , Ley Foon Tan , Marc Zyngier , Michael Ellerman , Paul Mackerras , Rich Felker , Stafford Horne , Stefan Kristiansson , Suzuki K Poulose , Tony Luck , Will Deacon , Yoshinori Sato , kvmarm@lists.cs.columbia.edu, kvm-ppc@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-sh@vger.kernel.org, nios2-dev@lists.rocketboards.org, openrisc@lists.librecores.org, uclinux-h8-devel@lists.sourceforge.jp, Mike Rapoport Subject: Re: [PATCH v2 00/13] mm: remove __ARCH_HAS_5LEVEL_HACK Message-ID: <20200216082230.GV25745@shell.armlinux.org.uk> References: <20200216081843.28670-1-rppt@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200216081843.28670-1-rppt@kernel.org> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Feb 16, 2020 at 10:18:30AM +0200, Mike Rapoport wrote: > From: Mike Rapoport > > Hi, > > These patches convert several architectures to use page table folding and > remove __ARCH_HAS_5LEVEL_HACK along with include/asm-generic/5level-fixup.h. > > The changes are mostly about mechanical replacement of pgd accessors with p4d > ones and the addition of higher levels to page table traversals. > > All the patches were sent separately to the respective arch lists and > maintainers hence the "v2" prefix. You fail to explain why this change which adds 488 additional lines of code is desirable. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up According to speedtest.net: 11.9Mbps down 500kbps up