mbox series

[v2,0/2] mm: Fix bug affecting swapping in MTE tagged pages

Message ID 20230516023514.2643054-1-pcc@google.com
Headers
Series mm: Fix bug affecting swapping in MTE tagged pages |

Message

Peter Collingbourne May 16, 2023, 2:35 a.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/

v2:
- Call arch_swap_restore() directly instead of via arch_do_swap_page()

Peter Collingbourne (2):
  mm: Call arch_swap_restore() from do_swap_page()
  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 +++----
 mm/memory.c                      |  7 +++++++
 5 files changed, 17 insertions(+), 47 deletions(-)