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Thu, 6 Feb 2020 20:01:23 +0000 Subject: Re: [PATCH] arm64: Kconfig: Enable NODES_SPAN_OTHER_NODES config for NUMA To: Will Deacon Cc: Catalin Marinas , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, patches@os.amperecomputing.com References: <1580759714-4614-1-git-send-email-Hoan@os.amperecomputing.com> <20200206102340.GA17074@willie-the-truck> From: Hoan Tran Message-ID: Date: Thu, 6 Feb 2020 12:01:19 -0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:60.0) Gecko/20100101 Thunderbird/60.9.1 In-Reply-To: <20200206102340.GA17074@willie-the-truck> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-ClientProxiedBy: CY4PR1201CA0020.namprd12.prod.outlook.com (2603:10b6:910:16::30) To DM6PR01MB4090.prod.exchangelabs.com (2603:10b6:5:27::11) MIME-Version: 1.0 Received: from [192.168.0.184] (67.161.31.237) by CY4PR1201CA0020.namprd12.prod.outlook.com (2603:10b6:910:16::30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2707.23 via Frontend Transport; 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X-Microsoft-Antispam-Message-Info: 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 X-MS-Exchange-AntiSpam-MessageData: 0IQLWH/mIsvZNftRnfN+FCij/KJAvk5Zu0P4i8eCAwkFIjo8JlSwx2kF3/ZdlQVamE9gLeNnQubCX6g9pgDBuu+tZraNPhB7Xbt6zafIlrj44zDf69XhfiyykLBzzlPM2aunxSdPnVqaas9npxB19Q== X-MS-Exchange-Transport-Forked: True X-OriginatorOrg: os.amperecomputing.com X-MS-Exchange-CrossTenant-Network-Message-Id: 681ef895-454b-45c8-4cc3-08d7ab3f5719 X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Feb 2020 20:01:23.1248 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3bc2b170-fd94-476d-b0ce-4229bdc904a7 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: Jb//zUTzLLVW5GP/VUA6kCpn7VI6j6CjD59hT5xmyQPW85o8TeC0X8tgICeKcaGHPPdXHNizP2OMWzhwSgmtnGreU++B1FN1usRW90BiFgc= X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR01MB5769 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Will, On 2/6/20 2:23 AM, Will Deacon wrote: > On Mon, Feb 03, 2020 at 11:55:14AM -0800, Hoan Tran wrote: >> Some NUMA nodes have memory ranges that span other nodes. >> Even though a pfn is valid and between a node's start and end pfns, >> it may not reside on that node. >> >> This patch enables NODES_SPAN_OTHER_NODES config for NUMA to support >> this type of NUMA layout. >> >> Signed-off-by: Hoan Tran >> --- >> arch/arm64/Kconfig | 7 +++++++ >> 1 file changed, 7 insertions(+) >> >> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig >> index e688dfa..939d28f 100644 >> --- a/arch/arm64/Kconfig >> +++ b/arch/arm64/Kconfig >> @@ -959,6 +959,13 @@ config NEED_PER_CPU_EMBED_FIRST_CHUNK >> config HOLES_IN_ZONE >> def_bool y >> >> +# Some NUMA nodes have memory ranges that span other nodes. >> +# Even though a pfn is valid and between a node's start and end pfns, >> +# it may not reside on that node. >> +config NODES_SPAN_OTHER_NODES >> + def_bool y >> + depends on ACPI_NUMA >> + > > I thought we agreed to do this in the core code? > > https://lore.kernel.org/lkml/1562887528-5896-1-git-send-email-Hoan@os.amperecomputing.com Yes, but it looks like Thomas didn't agree to apply this patch into x86. https://lore.kernel.org/lkml/alpine.DEB.2.21.1907152042110.1767@nanos.tec.linutronix.de/ Regards Hoan > > Will >