[PATCH 0/7] arch/mm/fault: accelerate pagefault when badaccess
Kefeng Wang
wangkefeng.wang at huawei.com
Tue Apr 2 00:51:35 PDT 2024
After VMA lock-based page fault handling enabled, if bad access met
under per-vma lock, it will fallback to mmap_lock-based handling,
so it leads to unnessary mmap lock and vma find again. A test from
lmbench shows 34% improve after this changes on arm64,
lat_sig -P 1 prot lat_sig 0.29194 -> 0.19198
Only build test on other archs except arm64.
Kefeng Wang (7):
arm64: mm: cleanup __do_page_fault()
arm64: mm: accelerate pagefault when VM_FAULT_BADACCESS
arm: mm: accelerate pagefault when VM_FAULT_BADACCESS
powerpc: mm: accelerate pagefault when badaccess
riscv: mm: accelerate pagefault when badaccess
s390: mm: accelerate pagefault when badaccess
x86: mm: accelerate pagefault when badaccess
arch/arm/mm/fault.c | 4 +++-
arch/arm64/mm/fault.c | 31 ++++++++++---------------------
arch/powerpc/mm/fault.c | 33 ++++++++++++++++++++-------------
arch/riscv/mm/fault.c | 5 ++++-
arch/s390/mm/fault.c | 3 ++-
arch/x86/mm/fault.c | 23 ++++++++++++++---------
6 files changed, 53 insertions(+), 46 deletions(-)
--
2.27.0
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