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Date:   Wed, 18 Jul 2018 15:56:19 +0200
From:   Michal Hocko <mhocko@kernel.org>
To:     David Hildenbrand <david@redhat.com>
Cc:     linux-mm@kvack.org, linux-kernel@vger.kernel.org,
        Alexander Potapenko <glider@google.com>,
        Andrew Morton <akpm@linux-foundation.org>,
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        Baoquan He <bhe@redhat.com>,
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        Boris Ostrovsky <boris.ostrovsky@oracle.com>,
        Dan Williams <dan.j.williams@intel.com>,
        Dave Young <dyoung@redhat.com>,
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        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Hari Bathini <hbathini@linux.vnet.ibm.com>,
        Huang Ying <ying.huang@intel.com>,
        Hugh Dickins <hughd@google.com>,
        Ingo Molnar <mingo@kernel.org>,
        Jaewon Kim <jaewon31.kim@samsung.com>, Jan Kara <jack@suse.cz>,
        =?iso-8859-1?B?Suly9G1l?= Glisse <jglisse@redhat.com>,
        Joonsoo Kim <iamjoonsoo.kim@lge.com>,
        Juergen Gross <jgross@suse.com>,
        Kate Stewart <kstewart@linuxfoundation.org>,
        "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
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        Mel Gorman <mgorman@suse.de>,
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        Thomas Gleixner <tglx@linutronix.de>,
        Vlastimil Babka <vbabka@suse.cz>
Subject: Re: [PATCH v1 00/10] mm: online/offline 4MB chunks controlled by
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On Wed 18-07-18 15:47:33, David Hildenbrand wrote:
[...]
> So would you agree to change the comment in page-flags.h to something like
> 
> "PG_reserved is set for special pages, that should never be touched
> (read/written). Some of them might not even exist."

Yes. Except you should mention that they should be touched by anybody
except their owners.
-- 
Michal Hocko
SUSE Labs