Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752357AbcLJFUG (ORCPT ); Sat, 10 Dec 2016 00:20:06 -0500 Received: from mail-pf0-f171.google.com ([209.85.192.171]:34638 "EHLO mail-pf0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751359AbcLJFUE (ORCPT ); Sat, 10 Dec 2016 00:20:04 -0500 Subject: Re: [PATCH 1/1] arm64: mm: add config options for page table configuration To: Will Deacon References: <1481139600-24455-1-git-send-email-scott.branden@broadcom.com> <1481139600-24455-2-git-send-email-scott.branden@broadcom.com> <20161208100014.GE33075@MBP.local> <762b8bec-60da-0bb8-28f4-b407ad70687b@broadcom.com> <20161208185717.GC15141@e104818-lin.cambridge.arm.com> <20161209105722.GD11767@arm.com> Cc: Catalin Marinas , Arnd Bergmann , linux-kernel@vger.kernel.org, BCM Kernel Feedback , Olof Johansson , linux-arm-kernel@lists.infradead.org From: Scott Branden Message-ID: <9c613ead-d215-3e53-40bf-126be3f1ad3e@broadcom.com> Date: Fri, 9 Dec 2016 21:20:01 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 In-Reply-To: <20161209105722.GD11767@arm.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 854 Lines: 22 Hi Will, On 16-12-09 02:57 AM, Will Deacon wrote: > On Thu, Dec 08, 2016 at 11:33:39AM -0800, Scott Branden wrote: >> Since I currently have your attention: I do think there is fundamental bug >> in the ARM64 mm implementation. If you look at /sys/devices/system/memory >> it only shows the last memoryX section created after init. > > That directory doesn't seem to exist on my arm64 systems. Do I have to > enable something specific in the .config? I looked in the /sys/devices/system/memory at it doesn't look like it appears until memory hotplug is enabled in the system. This is another patch I'm trying to work through at the same time: https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1284943.html The internals of the memory management subsystem is not something I'm too familiar with at this point. > > Will > Regards, Scott