linux-kernel - Re: [PATCH 02/19] arm64: expose number of page table levels on Kconfig level

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Message-Id: <4EC115AB-C100-4D62-99CA-5BB04303609B@gmail.com>
Date:	Sat, 31 Jan 2015 15:23:21 +0900
From:	Jungseok Lee <jungseoklee85@...il.com>
To:	Catalin Marinas <catalin.marinas@....com>
Cc:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Guenter Roeck <linux@...ck-us.net>,
	Will Deacon <Will.Deacon@....com>
Subject: Re: [PATCH 02/19] arm64: expose number of page table levels on Kconfig level

On Jan 30, 2015, at 11:56 PM, Catalin Marinas wrote:
> On Fri, Jan 30, 2015 at 02:43:11PM +0000, Kirill A. Shutemov wrote:
>> We would want to use number of page table level to define mm_struct.
>> Let's expose it as CONFIG_PGTABLE_LEVELS.
>> 
>> ARM64_PGTABLE_LEVELS is renamed to PGTABLE_LEVELS and defined before
>> sourcing init/Kconfig: arch/Kconfig will define default value and it's
>> sourced from init/Kconfig.
>> 
>> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
>> Cc: Catalin Marinas <catalin.marinas@....com>
>> Cc: Will Deacon <will.deacon@....com>
> 
> It looks fine.
> 
> Acked-by: Catalin Marinas <catalin.marinas@....com>

A system can boot up successfully on top of arm64/for-next/core branch under
4KB + {3|4}Level + CONFIG_DEBUG_RODATA, but I don't try it with 64KB pages.

Best Regards
Jungseok Lee
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