From: Catalin Marinas <catalin.marinas@arm.com>
To: Vanshidhar Konda <vanshikonda@os.amperecomputing.com>
Cc: Anshuman.Khandual@arm.com, linux-kernel@vger.kernel.org,
patches@amperecomputing.com, Will Deacon <will@kernel.org>,
Valentin.Schneider@arm.com, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2] arm64: NUMA: Kconfig: Increase NODES_SHIFT to 4
Date: Fri, 30 Oct 2020 10:25:08 +0000 [thread overview]
Message-ID: <20201030102507.GB23196@gaia> (raw)
In-Reply-To: <20201029203752.1114948-1-vanshikonda@os.amperecomputing.com>
On Thu, Oct 29, 2020 at 01:37:52PM -0700, Vanshidhar Konda wrote:
> The current arm64 default config limits max NUMA nodes available on
> system to 4 (NODES_SHIFT = 2). Today's arm64 systems can reach or
> exceed 16 NUMA nodes. To accomodate current hardware and to fit
> NODES_SHIFT within page flags on arm64, increase NODES_SHIFT to 4.
>
> Discussion on v1 of the patch:
> https://lkml.org/lkml/2020/10/20/767
Better use a stable link to refer to the past discussion:
Link: https://lore.kernel.org/r/20201020173409.1266576-1-vanshikonda@os.amperecomputing.com
> Signed-off-by: Vanshidhar Konda <vanshikonda@os.amperecomputing.com>
> ---
> arch/arm64/Kconfig | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index f858c352f72a..cffcc677011f 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -982,7 +982,7 @@ config NUMA
> config NODES_SHIFT
> int "Maximum NUMA Nodes (as a power of 2)"
> range 1 10
> - default "2"
> + default "4"
> depends on NEED_MULTIPLE_NODES
> help
> Specify the maximum number of NUMA Nodes available on the target
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
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prev parent reply other threads:[~2020-10-30 10:25 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-29 20:37 [PATCH v2] arm64: NUMA: Kconfig: Increase NODES_SHIFT to 4 Vanshidhar Konda
2020-10-30 10:25 ` Catalin Marinas [this message]
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