[PATCH rfc -next 00/10] mm: convert to generic VMA lock-based page fault

[Kefeng Wang]

Please ignore this one...

On 2023/7/13 17:51, Kefeng Wang wrote:
> Add a generic VMA lock-based page fault handler in mm core, and convert
> architectures to use it, which eliminate architectures's duplicated codes.
> 
> With it, we can avoid multiple changes in architectures's code if we
> add new feature or bugfix.
> 
> This fixes riscv missing change about commit 38b3aec8e8d2 "mm: drop per-VMA
> lock when returning VM_FAULT_RETRY or VM_FAULT_COMPLETED", and in the end,
> we enable this feature on ARM32/Loongarch too.
> 
> This is based on next-20230713, only built test(no loongarch compiler,
> so except loongarch).
> 
> Kefeng Wang (10):
>    mm: add a generic VMA lock-based page fault handler
>    x86: mm: use try_vma_locked_page_fault()
>    arm64: mm: use try_vma_locked_page_fault()
>    s390: mm: use try_vma_locked_page_fault()
>    powerpc: mm: use try_vma_locked_page_fault()
>    riscv: mm: use try_vma_locked_page_fault()
>    ARM: mm: try VMA lock-based page fault handling first
>    loongarch: mm: cleanup __do_page_fault()
>    loongarch: mm: add access_error() helper
>    loongarch: mm: try VMA lock-based page fault handling first
> 
>   arch/arm/Kconfig          |  1 +
>   arch/arm/mm/fault.c       | 15 ++++++-
>   arch/arm64/mm/fault.c     | 28 +++---------
>   arch/loongarch/Kconfig    |  1 +
>   arch/loongarch/mm/fault.c | 92 ++++++++++++++++++++++++---------------
>   arch/powerpc/mm/fault.c   | 54 ++++++++++-------------
>   arch/riscv/mm/fault.c     | 38 +++++++---------
>   arch/s390/mm/fault.c      | 23 +++-------
>   arch/x86/mm/fault.c       | 39 +++++++----------
>   include/linux/mm.h        | 28 ++++++++++++
>   mm/memory.c               | 42 ++++++++++++++++++
>   11 files changed, 206 insertions(+), 155 deletions(-)
>