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    SubjectRe: [patch 1/13] misc fixes
    On Monday 29 July 2002 22:00, Andrew Morton wrote:
    > > For this to work, anon pages will need to have something in page->index.
    > > This isn't too much of a challenge. A reasonable value to put in there is
    > > the creator's virtual address, shifted right, and perhaps mangled a little to
    > > reduce contention.
    > Well you want the likely-to-be-temporally-adjacent anon pages to
    > use the same lock. So maybe
    > page->index = some_global_int++;

    Actually, thinking again... the nice thing about this scheme is the
    opportunity to take the lock once for a whole batch of add_rmaps while
    walking through a page table, and the same for remove_rmap. So it
    definitely wants to be based on the virtual address.

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