linux-kernel - Re: [PATCH] mm/page_alloc: Add a reason for reserved pages in has_unmovable

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Message-ID: <a0bfcebe-a0f4-95ef-0973-8edd3780d013@redhat.com>
Date:   Fri, 4 Oct 2019 10:25:20 +0200
From:   David Hildenbrand <david@...hat.com>
To:     Qian Cai <cai@....pw>,
        Anshuman Khandual <Anshuman.Khandual@....com>
Cc:     linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...e.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Oscar Salvador <osalvador@...e.de>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Pavel Tatashin <pavel.tatashin@...rosoft.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm/page_alloc: Add a reason for reserved pages in
 has_unmovable_pages()

On 03.10.19 14:14, Qian Cai wrote:
> 
> 
>> On Oct 3, 2019, at 8:01 AM, Anshuman Khandual <Anshuman.Khandual@....com> wrote:
>>
>> Will something like this be better ?
> 
> Not really. dump_page() will dump PageCompound information anyway, so it is trivial to figure out if went in that path.
> 

I agree, I use the dump_page() output frequently to identify PG_reserved
pages. No need to duplicate that.


-- 

Thanks,

David / dhildenb