Message-ID: <58D52B78.9040303@cs.rutgers.edu>
Date: Fri, 24 Mar 2017 09:21:44 -0500
From: Zi Yan <zi.yan@cs.rutgers.edu>
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To: "Kirill A. Shutemov" <kirill@shutemov.name>
CC: Zi Yan <zi.yan@sent.com>, <linux-kernel@vger.kernel.org>,
        <linux-mm@kvack.org>, <kirill.shutemov@linux.intel.com>,
        <akpm@linux-foundation.org>, <minchan@kernel.org>, <vbabka@suse.cz>,
        <mgorman@techsingularity.net>, <mhocko@kernel.org>,
        <n-horiguchi@ah.jp.nec.com>, <khandual@linux.vnet.ibm.com>,
        <dnellans@nvidia.com>
Subject: Re: [PATCH v4 04/11] mm: thp: introduce CONFIG_ARCH_ENABLE_THP_MIGRATION
References: <20170313154507.3647-1-zi.yan@sent.com> <20170313154507.3647-5-zi.yan@sent.com> <20170324141037.2eyovzq2bmcdmwzu@node.shutemov.name>
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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
>> =20
>> +config ARCH_ENABLE_THP_MIGRATION
>> +	def_bool y
>> +	depends on X86_64 && TRANSPARENT_HUGEPAGE && MIGRATION
>> +
>=20
> TRANSPARENT_HUGEPAGE implies MIGRATION due to COMPACTION.
>=20

Sure. I will change it to:

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


Thanks.

--=20
Best Regards,
Yan Zi


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