linux-kernel - Re: [PATCH v2] arm64: defconfig: Enable memory hotplug and hotremove config

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Message-ID: <d4b409dc-b388-187d-4792-24909048a9ab@arm.com>
Date:   Thu, 30 Jun 2022 12:40:44 +0530
From:   Anshuman Khandual <anshuman.khandual@....com>
To:     Kefeng Wang <wangkefeng.wang@...wei.com>, catalin.marinas@....com,
        will@...nel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] arm64: defconfig: Enable memory hotplug and hotremove
 config



On 6/29/22 15:05, Kefeng Wang wrote:
> Let's enable ACPI_HMAT, ACPI_HOTPLUG_MEMORY, MEMORY_HOTPLUG
> and MEMORY_HOTREMOVE for more test coverage, also there are
> useful for heterogeneous memory scene.
> 
> Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
> ---
> v2: add ACPI_HMAT and update changelog too.

In general, would like to see MEMORY_HOTPLUG/HOTREMOVE be selected
here for better memory hotplug test coverage. But not sure whether
there had been a rationale for not enabling this on defconfig.

>  arch/arm64/configs/defconfig | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
> index 7d1105343bc2..78add6eefa2b 100644
> --- a/arch/arm64/configs/defconfig
> +++ b/arch/arm64/configs/defconfig
> @@ -101,6 +101,8 @@ CONFIG_ARM_TEGRA186_CPUFREQ=y
>  CONFIG_ARM_MEDIATEK_CPUFREQ=y
>  CONFIG_QORIQ_CPUFREQ=y
>  CONFIG_ACPI=y
> +CONFIG_ACPI_HOTPLUG_MEMORY=y
> +CONFIG_ACPI_HMAT=y
>  CONFIG_ACPI_APEI=y
>  CONFIG_ACPI_APEI_GHES=y
>  CONFIG_ACPI_APEI_PCIEAER=y
> @@ -125,6 +127,8 @@ CONFIG_SECCOMP=y
>  CONFIG_MODULES=y
>  CONFIG_MODULE_UNLOAD=y
>  # CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
> +CONFIG_MEMORY_HOTPLUG=y
> +CONFIG_MEMORY_HOTREMOVE=y
>  CONFIG_KSM=y
>  CONFIG_MEMORY_FAILURE=y
>  CONFIG_TRANSPARENT_HUGEPAGE=y