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[0/3] mm: Fix bug affecting swapping in MTE tagged pages

Message ID 20230512235755.1589034-1-pcc@google.com (mailing list archive)
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Series mm: Fix bug affecting swapping in MTE tagged pages | expand

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Peter Collingbourne May 12, 2023, 11:57 p.m. UTC 
This patch series reworks the logic that handles swapping in page
metadata to fix a reported bug [1] where metadata can sometimes not
be swapped in correctly after commit c145e0b47c77 ("mm: streamline COW
logic in do_swap_page()").

[1] https://lore.kernel.org/all/5050805753ac469e8d727c797c2218a9d780d434.camel@mediatek.com/

Peter Collingbourne (3):
  mm: Move arch_do_swap_page() call to before swap_free()
  mm: Call arch_swap_restore() from arch_do_swap_page() and deprecate
    the latter
  arm64: mte: Simplify swap tag restoration logic and fix uninitialized
    tag issue

 arch/arm64/include/asm/mte.h     |  4 ++--
 arch/arm64/include/asm/pgtable.h | 14 ++------------
 arch/arm64/kernel/mte.c          | 32 +++-----------------------------
 arch/arm64/mm/mteswap.c          |  7 +++----
 include/linux/pgtable.h          | 26 +++++++++++++-------------
 mm/memory.c                      | 26 +++++++++++++-------------
 6 files changed, 36 insertions(+), 73 deletions(-)