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    SubjectRe: 230-objrmap fixes for 2.6.3-mjb2

    --On Friday, March 26, 2004 15:25:23 -0800 Andrew Morton <>

    > It would be really, really nice if we could clean this crap up. mmap_sem
    > protects the vma tree, i_shared_sem protects the per-address_space vma
    > lists and page_table_lock protects the pagetables.
    > Does this sound like something we can achieve?
    > (Could page_table_lock then become per-vma?)

    The page_table_lock protection includes pgd and pmd. Would they receive
    adequate protection with a per-vma lock? Could we come up with some
    lockless scheme for managing them? They're pretty much write-once, as it

    Dave McCracken

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