linux-kernel - Re: [PATCH v3 6/8] mm/gup: use a standard migration target allocation callback

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Date:   Thu, 25 Jun 2020 14:08:30 +0200
From:   Michal Hocko <mhocko@...nel.org>
To:     js1304@...il.com
Cc:     Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, kernel-team@....com,
        Vlastimil Babka <vbabka@...e.cz>,
        Christoph Hellwig <hch@...radead.org>,
        Roman Gushchin <guro@...com>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>
Subject: Re: [PATCH v3 6/8] mm/gup: use a standard migration target
 allocation callback

On Tue 23-06-20 15:13:46, Joonsoo Kim wrote:
> From: Joonsoo Kim <iamjoonsoo.kim@....com>
> 
> There is a well-defined migration target allocation callback.
> It's mostly similar with new_non_cma_page() except considering CMA pages.
> 
> This patch adds a CMA consideration to the standard migration target
> allocation callback and use it on gup.c.

We already can express that by a missing __GFP_MOVABLE so I would rather
not introduce a duplication in form of another flag.
-- 
Michal Hocko
SUSE Labs