vm_object ref_count question

[Alan Cox]

On Thu, Oct 28, 2010 at 2:48 AM, Eknath Venkataramani <eknath.iyer at gmail.com
> wrote:

> ref_count is defined inside struct vm_object.
> and it is incremented everytime the object is referenced
> How is the page reference logged then? rather in which variable?
>
>
There is no per-page reference.  There is, however, a
garbage-collection-like process performed by vm_object_collapse().

Regards,
Alan