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    SubjectRe: 230-objrmap fixes for 2.6.3-mjb2
    Andrea Arcangeli <> wrote:
    > On Fri, Mar 26, 2004 at 11:57:23AM +0000, Hugh Dickins wrote:
    > > Andrea's 2.6.5-rc2-aa4 (anon_vma): based on Martin's, but very
    > > likely safe since it does not use find_vma at all in swapout, and
    > > unuse_process downs mmap_sem as Martin's used to before.
    > Hugh, thanks for the review! I also don't see locking bugs in this area
    > in my tree and I like not to take the page_table_lock during vma
    > manipulations since I don't seem to need it.

    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?)

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