linux-kernel - Re: [RFC PATCH 3/4] arm64: add support for memtest

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Message-ID: <20150302185607.GG7919@arm.com>
Date:	Mon, 2 Mar 2015 18:56:07 +0000
From:	Will Deacon <will.deacon@....com>
To:	Vladimir Murzin <Vladimir.Murzin@....com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
	"x86@...nel.org" <x86@...nel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"mingo@...hat.com" <mingo@...hat.com>,
	"hpa@...or.com" <hpa@...or.com>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"lauraa@...eaurora.org" <lauraa@...eaurora.org>,
	Catalin Marinas <Catalin.Marinas@....com>,
	"linux@....linux.org.uk" <linux@....linux.org.uk>,
	"arnd@...db.de" <arnd@...db.de>,
	Mark Rutland <Mark.Rutland@....com>,
	"ard.biesheuvel@...aro.org" <ard.biesheuvel@...aro.org>
Subject: Re: [RFC PATCH 3/4] arm64: add support for memtest

On Mon, Mar 02, 2015 at 02:55:44PM +0000, Vladimir Murzin wrote:
> Add support for memtest command line option.
> 
> Signed-off-by: Vladimir Murzin <vladimir.murzin@....com>
> ---
>  arch/arm64/mm/init.c |    2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
> index ae85da6..597831b 100644
> --- a/arch/arm64/mm/init.c
> +++ b/arch/arm64/mm/init.c
> @@ -190,6 +190,8 @@ void __init bootmem_init(void)
>  	min = PFN_UP(memblock_start_of_DRAM());
>  	max = PFN_DOWN(memblock_end_of_DRAM());
>  
> +	early_memtest(min << PAGE_SHIFT, max << PAGE_SHIFT);
> +
>  	/*
>  	 * Sparsemem tries to allocate bootmem in memory_present(), so must be
>  	 * done after the fixed reservations.

This is really neat, thanks for doing this Vladimir!

  Acked-by: Will Deacon <will.deacon@....com>

For the series, modulo Baruch's comments about Documentation updates.

Will
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