MFamd64  Eliminate unnecessary, recursive acquisitions and releases of the page  queues lock by free_pv_entry() and pmap_remove_pages().
MFamd64
 Eliminate unnecessary, recursive acquisitions and releases of the page
 queues lock by free_pv_entry() and pmap_remove_pages().

 Reduce the scope of the page queues lock in pmap_remove_pages().

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