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=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 0C67EC433E1 for ; Fri, 10 Jul 2020 03:16:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DE1C92072E for ; Fri, 10 Jul 2020 03:16:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726965AbgGJDQj (ORCPT ); Thu, 9 Jul 2020 23:16:39 -0400 Received: from foss.arm.com ([217.140.110.172]:44094 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726495AbgGJDQj (ORCPT ); Thu, 9 Jul 2020 23:16:39 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id E923831B; Thu, 9 Jul 2020 20:16:37 -0700 (PDT) Received: from localhost.localdomain (entos-thunderx2-02.shanghai.arm.com [10.169.212.213]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id A22283F9AB; Thu, 9 Jul 2020 20:16:28 -0700 (PDT) From: Jia He To: Catalin Marinas , Will Deacon , Tony Luck , Fenghua Yu , Yoshinori Sato , Rich Felker , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , David Hildenbrand Cc: x86@kernel.org, "H. Peter Anvin" , Dan Williams , Vishal Verma , Dave Jiang , Andrew Morton , Baoquan He , Chuhong Yuan , Mike Rapoport , Logan Gunthorpe , Masahiro Yamada , Michal Hocko , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org, linux-sh@vger.kernel.org, linux-nvdimm@lists.01.org, linux-mm@kvack.org, Jonathan Cameron , Kaly Xin , Jia He Subject: [PATCH v4 0/2] Fix and enable pmem as RAM device on arm64 Date: Fri, 10 Jul 2020 11:16:17 +0800 Message-Id: <20200710031619.18762-1-justin.he@arm.com> X-Mailer: git-send-email 2.17.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This fixies a few issues when I tried to enable pmem as RAM device on arm64. To use memory_add_physaddr_to_nid as a fallback nid, it would be better implement a general version (__weak) in mm/memory_hotplug. After that, arm64/ sh/s390 can simply use the general version, and PowerPC/ia64/x86 will use arch specific version. Tested on ThunderX2 host/qemu "-M virt" guest with a nvdimm device. The memblocks from the dax pmem device can be either hot-added or hot-removed on arm64 guest. Also passed the compilation test on x86. Changes: v4: - remove "device-dax: use fallback nid when numa_node is invalid", wait for Dan Williams' phys_addr_to_target_node() patch - folder v3 patch1-4 into single one, no functional changes v3: https://lkml.org/lkml/2020/7/8/1541 - introduce general version memory_add_physaddr_to_nid, refine the arch specific one - fix an uninitialization bug in v2 device-dax patch v2: https://lkml.org/lkml/2020/7/7/71 - Drop unnecessary patch to harden try_offline_node - Use new solution(by David) to fix dev->target_node=-1 during probing - Refine the mem_hotplug_begin/done patch v1: https://lkml.org/lkml/2020/7/5/381 Jia He (2): mm/memory_hotplug: introduce default dummy memory_add_physaddr_to_nid() mm/memory_hotplug: fix unpaired mem_hotplug_begin/done arch/arm64/mm/numa.c | 10 ---------- arch/ia64/mm/numa.c | 2 -- arch/sh/mm/init.c | 9 --------- arch/x86/mm/numa.c | 1 - mm/memory_hotplug.c | 15 ++++++++++++--- 5 files changed, 12 insertions(+), 25 deletions(-) -- 2.17.1