linux-kernel - Re: [PATCH v2] mips: Select SPARSEMEM

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Message-ID: <20220909154422.GA15019@alpha.franken.de>
Date:   Fri, 9 Sep 2022 17:44:22 +0200
From:   Thomas Bogendoerfer <tsbogend@...ha.franken.de>
To:     Alexander A Sverdlin <alexander.sverdlin@...ia.com>
Cc:     linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] mips: Select SPARSEMEM_EXTREME

On Fri, Sep 09, 2022 at 11:30:42AM +0200, Alexander A Sverdlin wrote:
> From: Alexander Sverdlin <alexander.sverdlin@...ia.com>
> 
> Commit c46173183657 ("MIPS: Add NUMA support for Loongson-3") has increased
> .bss size of the Octeon kernel from 16k to 16M. Providing the conditions
> for SPARSEMEM_EXTREME avoids the waste of memory.
> 
> Thomas has tested the loogsoon64 kernel, where .bss is being reduced by
> this patch from 16.5M to 515k.
> 
> Cc: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
> Signed-off-by: Alexander Sverdlin <alexander.sverdlin@...ia.com>
> ---
>  arch/mips/Kconfig | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
> index ec21f89..25dd4c5 100644
> --- a/arch/mips/Kconfig
> +++ b/arch/mips/Kconfig
> @@ -2669,7 +2669,6 @@ config ARCH_FLATMEM_ENABLE
>  
>  config ARCH_SPARSEMEM_ENABLE
>  	bool
> -	select SPARSEMEM_STATIC if !SGI_IP27
>  
>  config NUMA
>  	bool "NUMA Support"
> -- 
> 2.10.2

thank for the change, applied to mips-fixes.

Thomas.

-- 
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea.                                                [ RFC1925, 2.3 ]