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    thp: add tlb_remove_pmd_tlb_entry · f21760b1
    Shaohua Li 提交于
    We have tlb_remove_tlb_entry to indicate a pte tlb flush entry should be
    flushed, but not a corresponding API for pmd entry.  This isn't a
    problem so far because THP is only for x86 currently and tlb_flush()
    under x86 will flush entire TLB.  But this is confusion and could be
    missed if thp is ported to other arch.
    
    Also convert tlb->need_flush = 1 to a VM_BUG_ON(!tlb->need_flush) in
    __tlb_remove_page() as suggested by Andrea Arcangeli.  The
    __tlb_remove_page() function is supposed to be called after
    tlb_remove_xxx_tlb_entry() and we can catch any misuse.
    Signed-off-by: NShaohua Li <shaohua.li@intel.com>
    Reviewed-by: NAndrea Arcangeli <aarcange@redhat.com>
    Cc: David Rientjes <rientjes@google.com>
    Cc: Johannes Weiner <jweiner@redhat.com>
    Cc: Minchan Kim <minchan.kim@gmail.com>
    Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
    f21760b1
huge_memory.c 63.9 KB