On 02/15/2019 02:46 AM, Yu Zhao wrote: > Switch from per mm_struct to per pmd page table lock by enabling > ARCH_ENABLE_SPLIT_PMD_PTLOCK. This provides better granularity for > large system. > > I'm not sure if there is contention on mm->page_table_lock. Given > the option comes at no cost (apart from initializing more spin > locks), why not enable it now. > This has similar changes to what I had posted part of the general page table page accounting clean up series on arm64 last month. https://www.spinics.net/lists/arm-kernel/msg701954.html
