linux-kernel - [PATCH mm-unstable v1 0/4] mm/swap: stop using page->private on tail pages for THP

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Message-ID: <20230821160849.531668-1-david@redhat.com>
Date:   Mon, 21 Aug 2023 18:08:45 +0200
From:   David Hildenbrand <david@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     linux-mm@...ck.org, linux-arm-kernel@...ts.infradead.org,
        David Hildenbrand <david@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Matthew Wilcox <willy@...radead.org>,
        Peter Xu <peterx@...hat.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Hugh Dickins <hughd@...gle.com>,
        Seth Jennings <sjenning@...hat.com>,
        Dan Streetman <ddstreet@...e.org>,
        Vitaly Wool <vitaly.wool@...sulko.com>
Subject: [PATCH mm-unstable v1 0/4] mm/swap: stop using page->private on tail pages for THP_SWAP + cleanups

This series stops using page->private on tail pages for THP_SWAP,
replaces folio->private by folio->swap for swapcache folios, and starts
using "new_folio" for tail pages that we are splitting to remove the usage
of page->private for swapcache handling completely.

@Willy, I added your SOB on patch #2 from [1], hoping that's ok.

[1] https://lore.kernel.org/all/ZN1IH/8JxkkOU5Ec@casper.infradead.org/

Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Matthew Wilcox <willy@...radead.org>
Cc: Peter Xu <peterx@...hat.com>
Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Will Deacon <will@...nel.org>
Cc: Hugh Dickins <hughd@...gle.com>
Cc: Seth Jennings <sjenning@...hat.com>
Cc: Dan Streetman <ddstreet@...e.org>
Cc: Vitaly Wool <vitaly.wool@...sulko.com>

David Hildenbrand (3):
  mm/swap: stop using page->private on tail pages for THP_SWAP
  mm/swap: inline folio_set_swap_entry() and folio_swap_entry()
  mm/huge_memory: work on folio->swap instead of page->private when
    splitting folio

Matthew Wilcox (1):
  mm/swap: use dedicated entry for swap in folio

 arch/arm64/mm/mteswap.c  |  5 +++--
 include/linux/mm_types.h | 35 ++++++++++++++---------------------
 include/linux/swap.h     | 12 +++++-------
 mm/huge_memory.c         | 40 +++++++++++++++++++---------------------
 mm/memory.c              |  4 ++--
 mm/rmap.c                |  2 +-
 mm/shmem.c               |  6 +++---
 mm/swap_state.c          |  6 +++---
 mm/swapfile.c            |  6 +++---
 mm/util.c                |  2 +-
 mm/vmscan.c              |  2 +-
 mm/zswap.c               |  4 ++--
 12 files changed, 57 insertions(+), 67 deletions(-)

-- 
2.41.0