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: Jia He X-Patchwork-Id: 11653249 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 2B35A1709 for ; Thu, 9 Jul 2020 02:08:50 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 03B4020786 for ; Thu, 9 Jul 2020 02:08:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="cczzaKJE" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 03B4020786 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:MIME-Version:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:In-Reply-To:References:List-Owner; bh=GL8HIsvqzqOwljFR+YAznGykc3d9RjSujSQgsSM9mRc=; b=cczzaKJEowBRQmSdDRTMIRJ72P qie94StgvcHyRT5ihFuMdNVvCAbdzRYC/KjBJ0FT3gRjOtVVDCGnd+aRgkTJycu388LTPqs7YfHt2 q5JA3EvX7dqwLEC0MEENZ5c70SfpPsmNojOddm68vETvmJH+/927TWPAIO08InmdwuWAzx24NR6Qc 1hSA+e147s/HhHVsUWE5sWz0frJh5GdT5ZAM0zz3E9C4PhrrZLYNka3jglz2N4+SEV2t5wBysnZoX AT39+kRZUGPFmfsl5F0i4GivI9gndeaSBT9w8JWyd+Fl61e1WTmQfG8j6ORCqeKtg9tCmPyVyQ+zs GPVj3R6g==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jtLxf-00063I-Q2; Thu, 09 Jul 2020 02:06:55 +0000 Received: from foss.arm.com ([217.140.110.172]) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jtLxd-00062D-B1 for linux-arm-kernel@lists.infradead.org; Thu, 09 Jul 2020 02:06:54 +0000 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 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200708_220653_425953_9E155591 X-CRM114-Status: GOOD ( 13.84 ) X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [217.140.110.172 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kaly Xin , Michal Hocko , Dave Jiang , Baoquan He , linux-sh@vger.kernel.org, Vishal Verma , Masahiro Yamada , x86@kernel.org, Chuhong Yuan , linux-kernel@vger.kernel.org, Mike Rapoport , linux-mm@kvack.org, linux-nvdimm@lists.01.org, Jonathan Cameron , "H. Peter Anvin" , linux-ia64@vger.kernel.org, Dan Williams , Logan Gunthorpe , Andrew Morton , linux-arm-kernel@lists.infradead.org, Jia He MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.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(-)