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    SubjectRe: [patch 2/6] mmu_notifier: Callbacks to invalidate address ranges
    On Tue, Jan 29, 2008 at 04:20:50PM -0800, Christoph Lameter wrote:
    > On Wed, 30 Jan 2008, Andrea Arcangeli wrote:
    > > > invalidate_range after populate allows access to memory for which ptes
    > > > were zapped and the refcount was released.
    > >
    > > The last refcount is released by the invalidate_range itself.
    > That is true for your implementation and to address Robin's issues. Jack:
    > Is that true for the GRU?

    I'm not sure I understand the question. The GRU never (currently) takes
    a reference on a page. It has no mechanism for tracking pages that
    were exported to the external TLBs.

    --- jack

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