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Tue, 25 Feb 2020 23:21:02 +0000 Subject: Re: [PATCH] arm64: Kconfig: Enable NODES_SPAN_OTHER_NODES config for NUMA From: Hoan Tran 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> Message-ID: <32a35685-ff3e-9e5c-f6bb-960dd6f3d1d3@os.amperecomputing.com> Date: Tue, 25 Feb 2020 15:20:59 -0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit X-ClientProxiedBy: CY4PR13CA0033.namprd13.prod.outlook.com (2603:10b6:903:99::19) To SN6PR01MB4094.prod.exchangelabs.com (2603:10b6:805:a4::23) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [10.76.34.152] (4.28.12.214) by CY4PR13CA0033.namprd13.prod.outlook.com (2603:10b6:903:99::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2772.9 via Frontend Transport; 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Thanks Hoan On 2/6/20 12:01 PM, Hoan Tran wrote: > 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 >>