linux-kernel - [PATCH v2 0/3] mm,thp,rmap: rework the use of subpages

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Message-ID: <a5849eca-22f1-3517-bf29-95d982242742@google.com>
Date:   Tue, 22 Nov 2022 01:38:29 -0800 (PST)
From:   Hugh Dickins <hughd@...gle.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
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>, Yu Zhao <yuzhao@...gle.com>,
        Dan Carpenter <error27@...il.com>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: [PATCH v2 0/3] mm,thp,rmap: rework the use of subpages_mapcount

Andrew, please replace the 1/3, 1/3 fix, 2/3, 3/3 in mm-unstable
by these v2 three: which incorporate the uninitialized warning fix,
and adjustments according to Kirill's review comments, plus his
Acks - I couldn't quite manage them just by -fixes.
No functional change from the v1 series.

1/3 mm,thp,rmap: subpages_mapcount of PTE-mapped subpages
2/3 mm,thp,rmap: subpages_mapcount COMPOUND_MAPPED if PMD-mapped
3/3 mm,thp,rmap: clean up the end of __split_huge_pmd_locked()

 Documentation/mm/transhuge.rst |  10 +-
 include/linux/mm.h             |  67 +++++++----
 include/linux/rmap.h           |  12 +-
 mm/huge_memory.c               |  15 +--
 mm/page_alloc.c                |   2 +-
 mm/rmap.c                      | 219 ++++++++++-------------------------
 6 files changed, 124 insertions(+), 201 deletions(-)

Thanks!
Hugh