linux-kernel - Re: [PATCH 0/3] mm,thp,rmap: rework the use of subpages

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Date:   Fri, 18 Nov 2022 14:03:46 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Hugh Dickins <hughd@...gle.com>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Johannes Weiner <hannes@...xchg.org>,
        "Kirill A. Shutemov" <kirill@...temov.name>,
        Matthew Wilcox <willy@...radead.org>,
        David Hildenbrand <david@...hat.com>,
        Vlastimil Babka <vbabka@...e.cz>, Peter Xu <peterx@...hat.com>,
        Yang Shi <shy828301@...il.com>,
        John Hubbard <jhubbard@...dia.com>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Sidhartha Kumar <sidhartha.kumar@...cle.com>,
        Muchun Song <songmuchun@...edance.com>,
        Miaohe Lin <linmiaohe@...wei.com>,
        Naoya Horiguchi <naoya.horiguchi@...ux.dev>,
        Mina Almasry <almasrymina@...gle.com>,
        James Houghton <jthoughton@...gle.com>,
        "Zach O'Keefe" <zokeefe@...gle.com>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: [PATCH 0/3] mm,thp,rmap: rework the use of subpages_mapcount

On Fri, 18 Nov 2022 12:51:09 -0800 (PST) Hugh Dickins <hughd@...gle.com> wrote:

> But the first series has not yet graduated from mm-unstable,
> so if Andrew and/or Kirill also prefer to have them combined into one
> bit_spin_lock-less series, that I can do.  (And the end result should be
> identical, so would not complicate Johannes's lock_page_memcg() excision.)

I'd prefer that approach.  It's -rc5 and the earlier "mm,huge,rmap:
unify and speed up compound mapcounts" series has had some testing. 
I'd prefer not to toss it all out and start again.