linux-kernel - Re: [PATCH v1 02/11] mm: thp: introduce CONFIG_ARCH_ENABLE_HUGEPAGE

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Message-ID: <20160307005804.GA25148@cotter.ozlabs.ibm.com>
Date:	Mon, 7 Mar 2016 11:58:04 +1100
From:	Balbir Singh <bsingharora@...il.com>
To:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>
Cc:	linux-mm@...ck.org,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Hugh Dickins <hughd@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dave Hansen <dave.hansen@...el.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Mel Gorman <mgorman@...hsingularity.net>,
	Michal Hocko <mhocko@...nel.org>,
	Vlastimil Babka <vbabka@...e.cz>,
	Pavel Emelyanov <xemul@...allels.com>,
	linux-kernel@...r.kernel.org,
	Naoya Horiguchi <nao.horiguchi@...il.com>
Subject: Re: [PATCH v1 02/11] mm: thp: introduce
 CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION

On Thu, Mar 03, 2016 at 04:41:49PM +0900, Naoya Horiguchi wrote:
> Introduces CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION to limit thp migration
> functionality to x86_64, which should be safer at the first step.
>

The changelog is not helpful. Could you please describe what is
architecture specific in these changes? What do other arches need to do
to port these changes over?