linux-kernel - Re: [PATCH 4/6] mm: hugetlb_vmemmap: move vmemmap code related to HugeTLB to hugetlb

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Date:   Mon, 13 Jun 2022 14:34:38 -0700
From:   Mike Kravetz <mike.kravetz@...cle.com>
To:     Muchun Song <songmuchun@...edance.com>
Cc:     david@...hat.com, akpm@...ux-foundation.org, corbet@....net,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org
Subject: Re: [PATCH 4/6] mm: hugetlb_vmemmap: move vmemmap code related to
 HugeTLB to hugetlb_vmemmap.c

On Mon, Jun 13, 2022 at 02:35:10PM +0800”, Muchun Song wrote:
> When I first introduced vmemmap manipulation functions related to HugeTLB,
> I thought those functions may be reused by other modules (e.g. using
> similar approach to optimize vmemmap pages, unfortunately, the DAX used the
> same approach but does not use those functions).  After two years, we didn't
> see any other users.  So move those functions to hugetlb_vmemmap.c.
> 
> Signed-off-by: Muchun Song <songmuchun@...edance.com>
> ---
>  include/linux/mm.h   |   7 -
>  mm/hugetlb_vmemmap.c | 391 ++++++++++++++++++++++++++++++++++++++++++++++++++-
>  mm/sparse-vmemmap.c  | 391 ---------------------------------------------------
>  3 files changed, 390 insertions(+), 399 deletions(-)

Code movement without any functional change.

Reviewed-by: Mike Kravetz <mike.kravetz@...cle.com>
-- 
Mike Kravetz