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Date:   Fri, 4 Oct 2019 12:58:24 +0200
From:   Michal Hocko <mhocko@kernel.org>
To:     Anshuman Khandual <anshuman.khandual@arm.com>
Cc:     linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>,
        Vlastimil Babka <vbabka@suse.cz>,
        Oscar Salvador <osalvador@suse.de>,
        Mel Gorman <mgorman@techsingularity.net>,
        Mike Rapoport <rppt@linux.ibm.com>,
        Dan Williams <dan.j.williams@intel.com>,
        Pavel Tatashin <pavel.tatashin@microsoft.com>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm/page_alloc: Add a reason for reserved pages in
 has_unmovable_pages()
Message-ID: <20191004105824.GD9578@dhcp22.suse.cz>
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On Thu 03-10-19 13:40:57, Anshuman Khandual wrote:
> Having unmovable pages on a given pageblock should be reported correctly
> when required with REPORT_FAILURE flag. But there can be a scenario where a
> reserved page in the page block will get reported as a generic "unmovable"
> reason code. Instead this should be changed to a more appropriate reason
> code like "Reserved page".

Others have already pointed out this is just redundant but I will have a
more generic comment on the changelog. There is essentially no
information why the current state is bad/unhelpful and why the chnage is
needed. All you claim is that something is a certain way and then assert
that it should be done differently. That is not how changelogs should
look like.
-- 
Michal Hocko
SUSE Labs