linux-kernel - Re: [PATCH 07/29] selftests/mm: Merge default_huge_page

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Date:   Mon, 3 Apr 2023 11:16:22 -0400
From:   Peter Xu <peterx@...hat.com>
To:     Mike Kravetz <mike.kravetz@...cle.com>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        David Hildenbrand <david@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Axel Rasmussen <axelrasmussen@...gle.com>,
        Leonardo Bras Soares Passos <lsoaresp@...hat.com>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>,
        Nadav Amit <nadav.amit@...il.com>
Subject: Re: [PATCH 07/29] selftests/mm: Merge default_huge_page_size() into
 one

On Fri, Mar 31, 2023 at 11:15:35AM -0700, Mike Kravetz wrote:
> On 03/30/23 12:07, Peter Xu wrote:
> > There're already 3 same definitions of the three functions.  Move it into
> > vm_util.[ch].
> > 
> > Signed-off-by: Peter Xu <peterx@...hat.com>
> > ---
> >  tools/testing/selftests/mm/hugetlb-madvise.c | 25 +-------------------
> >  tools/testing/selftests/mm/thuge-gen.c       | 19 +--------------
> >  tools/testing/selftests/mm/userfaultfd.c     | 24 -------------------
> >  tools/testing/selftests/mm/vm_util.c         | 21 ++++++++++++++++
> >  tools/testing/selftests/mm/vm_util.h         |  1 +
> >  5 files changed, 24 insertions(+), 66 deletions(-)
> 
> Thanks!
> 
> Some of those copies were make by me.  Sorry.
> 
> Reviewed-by: Mike Kravetz <mike.kravetz@...cle.com>

Thanks!

> 
> BTW - The same code (even with '... copied from mlock2-tests.c) resides
> in the selftests/memfd directory.  I did that as well. :( Suspect it is OK
> to leave the copy there.  But, it does make me wonder why memfd is not in
> the mm directory?

I don't know either, I suspect it was just a personal preference when it
was firstly introduced in:

        commit 4f5ce5e8d7e2da3c714df8a7fa42edb9f992fc52
        Author: David Herrmann <dh.herrmann@...il.com>
        Date:   Fri Aug 8 14:25:32 2014 -0700

        selftests: add memfd_create() + sealing tests

So I left all those alone for now. Logically they should be merged into mm/
indeed, perhaps in some future cleanups.

-- 
Peter Xu