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From: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
To: Michal Hocko <mhocko@kernel.org>
CC: "linux-mm@kvack.org" <linux-mm@kvack.org>,
        "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        Hugh Dickins <hughd@google.com>,
        "Andrew Morton" <akpm@linux-foundation.org>,
        Dave Hansen <dave.hansen@intel.com>,
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        Mel Gorman <mgorman@techsingularity.net>,
        Vlastimil Babka <vbabka@suse.cz>,
        "Pavel Emelyanov" <xemul@parallels.com>,
        Zi Yan <zi.yan@cs.rutgers.edu>, Balbir Singh <bsingharora@gmail.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Naoya Horiguchi <nao.horiguchi@gmail.com>
Subject: Re: [PATCH v2 05/12] mm: thp: add core routines for thp/pmd
 migration
Thread-Topic: [PATCH v2 05/12] mm: thp: add core routines for thp/pmd
 migration
Thread-Index: AQHSOU9Q7WDKwpLw/E++HKi9rnTMz6Dt/rsAgAEkXoA=
Date: Tue, 29 Nov 2016 07:57:58 +0000
Message-ID: <20161129075757.GB15582@hori1.linux.bs1.fc.nec.co.jp>
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On Mon, Nov 28, 2016 at 03:31:32PM +0100, Michal Hocko wrote:
> On Tue 08-11-16 08:31:50, Naoya Horiguchi wrote:
> > This patch prepares thp migration's core code. These code will be open when
> > unmap_and_move() stops unconditionally splitting thp and get_new_page() starts
> > to allocate destination thps.
> 
> this description is underdocumented to say the least. Could you
> provide a high level documentation here please?

Yes, I'll do.

And maybe some update on Documentation/vm/page_migration will be wanted,
so will do it too.

Thanks,
Naoya Horiguchi