linux-kernel - Re: [PATCH 7/7] mm/gup: Retire follow_hugetlb

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Date:   Mon, 19 Jun 2023 15:41:20 -0400
From:   Peter Xu <peterx@...hat.com>
To:     Lorenzo Stoakes <lstoakes@...il.com>
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Matthew Wilcox <willy@...radead.org>,
        Andrea Arcangeli <aarcange@...hat.com>,
        John Hubbard <jhubbard@...dia.com>,
        Mike Rapoport <rppt@...nel.org>,
        David Hildenbrand <david@...hat.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        "Kirill A . Shutemov" <kirill@...temov.name>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        James Houghton <jthoughton@...gle.com>,
        Hugh Dickins <hughd@...gle.com>
Subject: Re: [PATCH 7/7] mm/gup: Retire follow_hugetlb_page()

On Sat, Jun 17, 2023 at 09:40:41PM +0100, Lorenzo Stoakes wrote:
> On Tue, Jun 13, 2023 at 05:53:46PM -0400, Peter Xu wrote:
> > Now __get_user_pages() should be well prepared to handle thp completely,
> > as long as hugetlb gup requests even without the hugetlb's special path.
> >
> > Time to retire follow_hugetlb_page().
> 
> Nit, but there's a couple left over references to this function in comments
> in fs/userfaultfd.c and mm/hugetlb.c.

Indeed, let me touch those too when respin.

> Absolutely wonderful to see such delightful code deletion :)
> 
> I haven't really dug into the huge page side of this in great detail, so I
> can't give a meaningful tag, but I can certainly appreciate the code you're
> removing here!

Yeah, hopefully it'll make the code also cleaner.  Thanks a lot,

-- 
Peter Xu