• Yu Zhao's avatar
    arm64: mm: enable per pmd page table lock · 54c8d911
    Yu Zhao authored
    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.
    
    We only do so when pmd is not folded, so we don't mistakenly call
    pgtable_pmd_page_ctor() on pud or p4d in pgd_pgtable_alloc().
    Signed-off-by: default avatarYu Zhao <yuzhao@google.com>
    Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
    54c8d911
tlb.h 2.07 KB