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=-4.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS 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 D1777C43444 for ; Wed, 26 Dec 2018 13:38:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A3736218AD for ; Wed, 26 Dec 2018 13:38:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726982AbeLZNhH (ORCPT ); Wed, 26 Dec 2018 08:37:07 -0500 Received: from mga04.intel.com ([192.55.52.120]:33941 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726724AbeLZNhF (ORCPT ); Wed, 26 Dec 2018 08:37:05 -0500 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 26 Dec 2018 05:37:04 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,400,1539673200"; d="scan'208";a="121185455" Received: from wangdan1-mobl1.ccr.corp.intel.com (HELO wfg-t570.sh.intel.com) ([10.254.210.154]) by FMSMGA003.fm.intel.com with ESMTP; 26 Dec 2018 05:37:01 -0800 Received: from wfg by wfg-t570.sh.intel.com with local (Exim 4.89) (envelope-from ) id 1gc9Mr-0005Nv-69; Wed, 26 Dec 2018 21:37:01 +0800 Message-Id: <20181226133351.106676005@intel.com> User-Agent: quilt/0.65 Date: Wed, 26 Dec 2018 21:14:47 +0800 From: Fengguang Wu To: Andrew Morton cc: Linux Memory Management List , Fan Du , Fengguang Wu cc: kvm@vger.kernel.org Cc: LKML cc: Yao Yuan cc: Peng Dong cc: Huang Ying CC: Liu Jingqi cc: Dong Eddie cc: Dave Hansen cc: Zhang Yi cc: Dan Williams Subject: [RFC][PATCH v2 01/21] e820: cheat PMEM as DRAM References: <20181226131446.330864849@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline; filename=0001-e820-Force-PMEM-entry-as-RAM-type-to-enumerate-NUMA-.patch Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Fan Du This is a hack to enumerate PMEM as NUMA nodes. It's necessary for current BIOS that don't yet fill ACPI HMAT table. WARNING: take care to backup. It is mutual exclusive with libnvdimm subsystem and can destroy ndctl managed namespaces. Signed-off-by: Fan Du Signed-off-by: Fengguang Wu --- arch/x86/kernel/e820.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- linux.orig/arch/x86/kernel/e820.c 2018-12-23 19:20:34.587078783 +0800 +++ linux/arch/x86/kernel/e820.c 2018-12-23 19:20:34.587078783 +0800 @@ -403,7 +403,8 @@ static int __init __append_e820_table(st /* Ignore the entry on 64-bit overflow: */ if (start > end && likely(size)) return -1; - + if (type == E820_TYPE_PMEM) + type = E820_TYPE_RAM; e820__range_add(start, size, type); entry++;