From patchwork Thu Jul 9 02:06:23 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Justin He X-Patchwork-Id: 11653193 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4F6426C1 for ; Thu, 9 Jul 2020 02:06:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 390AE206F6 for ; Thu, 9 Jul 2020 02:06:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726129AbgGICGr (ORCPT ); Wed, 8 Jul 2020 22:06:47 -0400 Received: from foss.arm.com ([217.140.110.172]:52366 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726072AbgGICGr (ORCPT ); Wed, 8 Jul 2020 22:06:47 -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 87FBE31B; Wed, 8 Jul 2020 19:06:46 -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 363C73F887; Wed, 8 Jul 2020 19:06:36 -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 v3 0/6] Fix and enable pmem as RAM device on arm64 Date: Thu, 9 Jul 2020 10:06:23 +0800 Message-Id: <20200709020629.91671-1-justin.he@arm.com> X-Mailer: git-send-email 2.17.1 Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@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: v3: - 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 (6): mm/memory_hotplug: introduce default dummy memory_add_physaddr_to_nid() arm64/mm: use default dummy memory_add_physaddr_to_nid() sh/mm: use default dummy memory_add_physaddr_to_nid() mm: don't export memory_add_physaddr_to_nid in arch specific directory device-dax: use fallback nid when numa_node is invalid 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 - drivers/dax/kmem.c | 21 +++++++++++++-------- mm/memory_hotplug.c | 15 ++++++++++++--- 6 files changed, 25 insertions(+), 33 deletions(-)