ff62d4c0c5
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be locked before it can be marked as `active' on a processor. - Require that pmaps other than the kernel pmap be locked when they are passed to pmap_tlb_shootdown(). This, combined with the locking protocol tweak, allow us to get a consistent view of `activeness' of a pmap, which means we can optmize away a lot of TLB shootdown traffic for user pmaps. - Borrow an idea from the i386mp branch; use the normal SHOOTDOWN IPI to deal with hitting the entire TLB, and garbage-collect the TBIA and TBIAP IPIs.
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