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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham 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 AA910C433E2 for ; Mon, 6 Jul 2020 01:20:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 862B420715 for ; Mon, 6 Jul 2020 01:20:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728696AbgGFBUJ (ORCPT ); Sun, 5 Jul 2020 21:20:09 -0400 Received: from foss.arm.com ([217.140.110.172]:45830 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728509AbgGFBUH (ORCPT ); Sun, 5 Jul 2020 21:20:07 -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 76057C0A; Sun, 5 Jul 2020 18:20:07 -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 111313F718; Sun, 5 Jul 2020 18:20:03 -0700 (PDT) From: Jia He To: Catalin Marinas , Will Deacon Cc: Andrew Morton , Mike Rapoport , Baoquan He , Chuhong Yuan , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Kaly Xin , Jia He Subject: [PATCH 1/3] arm64/numa: set numa_off to false when numa node is fake Date: Mon, 6 Jul 2020 09:19:45 +0800 Message-Id: <20200706011947.184166-2-justin.he@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200706011947.184166-1-justin.he@arm.com> References: <20200706011947.184166-1-justin.he@arm.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Previously, numa_off is set to true unconditionally in dummy_numa_init(), even if there is a fake numa node. But acpi will translate node id to NUMA_NO_NODE(-1) in acpi_map_pxm_to_node() because it regards numa_off as turning off the numa node. Without this patch, pmem can't be probed as a RAM device on arm64 if SRAT table isn't present. $ndctl create-namespace -fe namespace0.0 --mode=devdax --map=dev -s 1g -a 64K kmem dax0.0: rejecting DAX region [mem 0x240400000-0x2bfffffff] with invalid node: -1 kmem: probe of dax0.0 failed with error -22 This fixes it by setting numa_off to false. Signed-off-by: Jia He --- arch/arm64/mm/numa.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/arm64/mm/numa.c b/arch/arm64/mm/numa.c index aafcee3e3f7e..7689986020d9 100644 --- a/arch/arm64/mm/numa.c +++ b/arch/arm64/mm/numa.c @@ -440,7 +440,8 @@ static int __init dummy_numa_init(void) return ret; } - numa_off = true; + /* force numa_off to be false since we have a fake numa node here */ + numa_off = false; return 0; } -- 2.17.1