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SubjectRe: [PATCH v4 04/11] mm: thp: introduce CONFIG_ARCH_ENABLE_THP_MIGRATION


Kirill A. Shutemov wrote:
> On Mon, Mar 13, 2017 at 11:45:00AM -0400, Zi Yan wrote:
>> From: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
>>
>> Introduces CONFIG_ARCH_ENABLE_THP_MIGRATION to limit thp migration
>> functionality to x86_64, which should be safer at the first step.
>>
>> Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
>> ---
>> v1 -> v2:
>> - fixed config name in subject and patch description
>> ---
>> arch/x86/Kconfig | 4 ++++
>> include/linux/huge_mm.h | 10 ++++++++++
>> mm/Kconfig | 3 +++
>> 3 files changed, 17 insertions(+)
>>
>> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
>> index 69188841717a..a24bc11c7aed 100644
>> --- a/arch/x86/Kconfig
>> +++ b/arch/x86/Kconfig
>> @@ -2276,6 +2276,10 @@ config ARCH_ENABLE_HUGEPAGE_MIGRATION
>> def_bool y
>> depends on X86_64 && HUGETLB_PAGE && MIGRATION
>>
>> +config ARCH_ENABLE_THP_MIGRATION
>> + def_bool y
>> + depends on X86_64 && TRANSPARENT_HUGEPAGE && MIGRATION
>> +
>
> TRANSPARENT_HUGEPAGE implies MIGRATION due to COMPACTION.
>

Sure. I will change it to:

+config ARCH_ENABLE_THP_MIGRATION
+ def_bool y
+ depends on X86_64 && TRANSPARENT_HUGEPAGE
+


Thanks.

--
Best Regards,
Yan Zi

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