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Date:   Thu, 5 Apr 2018 17:05:47 +0200
From:   Michal Hocko <>
To:     "Kirill A. Shutemov" <>
Cc:     Naoya Horiguchi <>,
        "" <>,
        Andrew Morton <>,
        Vlastimil Babka <>,
        "" <>
Subject: Re: [PATCH v1] mm: consider non-anonymous thp as unmovable page

On Thu 05-04-18 16:40:45, Kirill A. Shutemov wrote:
> On Thu, Apr 05, 2018 at 02:48:30PM +0200, Michal Hocko wrote:
> > RIght, I confused the two. What is the proper layer to fix that then?
> > rmap_walk_file?
> Maybe something like this? Totally untested.

This looks way too complex. Why cannot we simply split THP page cache
during migration?
Michal Hocko

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