[PATCH -v2 0/2] arm, tlbflush: avoid TLBI broadcast if page reused in write fault

[Huang Ying]

This series is to optimize the system performance via avoiding TLBI
broadcast if page is reused in the write protect fault handler.  More
details of the background and the test results can be found in [2/2].

Changelog:

v2:

- Various code cleanup in [1/2], Thanks David's comments!
- Remove unnecessary __local_flush_tlb_page_nosync() in [2/2], Thanks Ryan's comments!
- Add missing contpte processing, Thanks Rayn and Catalin's comments!

Huang Ying (2):
  mm: add spurious fault fixing support for huge pmd
  arm64, tlbflush: don't TLBI broadcast if page reused in write fault

 arch/arm64/include/asm/pgtable.h  | 14 +++++---
 arch/arm64/include/asm/tlbflush.h | 56 +++++++++++++++++++++++++++++++
 arch/arm64/mm/contpte.c           |  3 +-
 arch/arm64/mm/fault.c             |  2 +-
 include/linux/pgtable.h           |  4 +++
 mm/huge_memory.c                  | 22 +++++++++---
 mm/internal.h                     |  4 +--
 7 files changed, 90 insertions(+), 15 deletions(-)

Best Regards,
Huang, Ying