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Subject: Re: [RFC PATCH 7/7] powerpc/hugetlb: Enable hugetlb migration for
 ppc64
To: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
 benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au
References: <1491314675-15787-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com>
 <1491314675-15787-7-git-send-email-aneesh.kumar@linux.vnet.ibm.com>
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From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Date: Fri, 7 Apr 2017 17:56:35 +0530
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On 04/04/2017 07:34 PM, Aneesh Kumar K.V wrote:
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.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 382c3dd86d6d..c0ca27521679 100644
> --- a/arch/powerpc/platforms/Kconfig.cputype
> +++ b/arch/powerpc/platforms/Kconfig.cputype
> @@ -350,6 +350,11 @@ 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
> +

I have tested this patch series both for anon and file mapping
on a POWER8 box with 16MB pages. Will try to test it for 16GB
pages on a PVM system.