linux-kernel - Re: [PATCH v2 04/12] mm: thp: introduce CONFIG_ARCH_ENABLE_THP

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Message-ID: <20161128142154.GM14788@dhcp22.suse.cz>
Date:   Mon, 28 Nov 2016 15:21:54 +0100
From:   Michal Hocko <mhocko@...nel.org>
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>,
        Vlastimil Babka <vbabka@...e.cz>,
        Pavel Emelyanov <xemul@...allels.com>,
        Zi Yan <zi.yan@...rutgers.edu>,
        Balbir Singh <bsingharora@...il.com>,
        linux-kernel@...r.kernel.org,
        Naoya Horiguchi <nao.horiguchi@...il.com>
Subject: Re: [PATCH v2 04/12] mm: thp: introduce
 CONFIG_ARCH_ENABLE_THP_MIGRATION

On Tue 08-11-16 08:31:49, Naoya Horiguchi wrote:
> Introduces CONFIG_ARCH_ENABLE_THP_MIGRATION to limit thp migration
> functionality to x86_64, which should be safer at the first step.

Please make sure to describe why this has to be arch specific and what
are arches supposed to provide in order to enable this option.
-- 
Michal Hocko
SUSE Labs