linux-kernel - Re: [PATCH v1 12/12] mm: ppc64: Add THP migration support for ppc64.

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Date:   Fri, 30 Sep 2016 10:02:33 +1000
From:   Balbir Singh <bsingharora@...il.com>
To:     zi.yan@...t.com, linux-kernel@...r.kernel.org, linux-mm@...ck.org
Cc:     benh@...nel.crashing.org, mgorman@...hsingularity.net,
        kirill.shutemov@...ux.intel.com, akpm@...ux-foundation.org,
        dave.hansen@...ux.intel.com, n-horiguchi@...jp.nec.com,
        Zi Yan <zi.yan@...rutgers.edu>
Subject: Re: [PATCH v1 12/12] mm: ppc64: Add THP migration support for ppc64.



On 27/09/16 01:22, zi.yan@...t.com wrote:
> From: Zi Yan <zi.yan@...rutgers.edu>
> 
> Signed-off-by: Zi Yan <zi.yan@...rutgers.edu>
> ---
>  arch/powerpc/Kconfig                         |  4 ++++
>  arch/powerpc/include/asm/book3s/64/pgtable.h | 23 +++++++++++++++++++++++
>  2 files changed, 27 insertions(+)
> 
> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index 927d2ab..84ffd4c 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/Kconfig
> @@ -553,6 +553,10 @@ config ARCH_SPARSEMEM_DEFAULT
>  config SYS_SUPPORTS_HUGETLBFS
>  	bool
>  
> +config ARCH_ENABLE_THP_MIGRATION
> +	def_bool y
> +	depends on PPC64 && TRANSPARENT_HUGEPAGE && MIGRATION

I had done the same patch before but never posted it, since Nayomi's patches
were blocked behind _PAGE_PSE (x86 specific concern for __pmdp_present())

Having said that this addition looks good to me

Acked-by: Balbir Singh <bsingharora@...il.com>