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Attempt VMA lock-based page fault handling first, and fall back to the existing mmap_lock-based handling if that fails. A simple running the ebizzy benchmark on Lichee Pi 4A shows that PER_VMA_LOCK can improve the ebizzy benchmark by about 32.68%. In theory, the more CPUs, the bigger improvement, but I don't have any HW platform which has more than 4 CPUs. This is the riscv variant of "x86/mm: try VMA lock-based page fault handling first". Signed-off-by: Jisheng Zhang <jszhang@kernel.org> Reviewed-by: Guo Ren <guoren@kernel.org> Reviewed-by: Suren Baghdasaryan <surenb@google.com> Link: https://lore.kernel.org/r/20230523165942.2630-1-jszhang@kernel.org Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com> |
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boot | ||
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errata | ||
include | ||
kernel | ||
kvm | ||
lib | ||
mm | ||
net | ||
purgatory | ||
tools | ||
Kbuild | ||
Kconfig | ||
Kconfig.debug | ||
Kconfig.errata | ||
Kconfig.socs | ||
Makefile | ||
Makefile.postlink |