linux-kernel - Re: [PATCH v2 9/9] powerpc/hugetlb: Enable hugetlb migration for ppc64

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Message-Id: <871serrfno.fsf@linux.vnet.ibm.com>
Date:   Fri, 04 May 2018 13:55:31 +0530
From:   "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
To:     Christophe LEROY <christophe.leroy@....fr>, mpe@...erman.id.au
Cc:     akpm@...ux-foundation.org, linux-mm@...ck.org,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 9/9] powerpc/hugetlb: Enable hugetlb migration for ppc64

Christophe LEROY <christophe.leroy@....fr> writes:

> Le 16/05/2017 à 11:23, Aneesh Kumar K.V a écrit :
>> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@...ux.vnet.ibm.com>
>> ---
>>   arch/powerpc/platforms/Kconfig.cputype | 5 +++++
>>   1 file changed, 5 insertions(+)
>> 
>> diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
>> index 80175000042d..8acc4f27d101 100644
>> --- a/arch/powerpc/platforms/Kconfig.cputype
>> +++ b/arch/powerpc/platforms/Kconfig.cputype
>> @@ -351,6 +351,11 @@ config PPC_RADIX_MMU
>>   	  is only implemented by IBM Power9 CPUs, if you don't have one of them
>>   	  you can probably disable this.
>>   
>> +config ARCH_ENABLE_HUGEPAGE_MIGRATION
>> +	def_bool y
>> +	depends on PPC_BOOK3S_64 && HUGETLB_PAGE && MIGRATION
>> +
>> +
>
> Is there a reason why you redefine ARCH_ENABLE_HUGEPAGE_MIGRATION 
> instead of doing a 'select' as it is already defined in mm/Kconfig ?
>

That got copied from x86 Kconfig i guess.

-aneesh