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Date: Tue, 29 Jan 2008 16:35:44 -0800 (PST)
From: Christoph Lameter <clameter@sgi.com>
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To: Jack Steiner <steiner@sgi.com>
cc: Andrea Arcangeli <andrea@qumranet.com>, Robin Holt <holt@sgi.com>,
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       linux-mm@kvack.org, daniel.blueman@quadrics.com,
       Hugh Dickins <hugh@veritas.com>
Subject: Re: [patch 2/6] mmu_notifier: Callbacks to invalidate address ranges
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On Tue, 29 Jan 2008, Jack Steiner wrote:

> > 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.

Thats what I was looking for. Thanks. KVM takes a refcount and so does 
XPmem.

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