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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