>I assume that this is because pte_mk* expands into set_pte.
It doesn't.
>Any solution that just invokes pte_val wouldn't have this problem. It would
No, Dave is only worried by doing the additional math before the
comparison. In a system that doesn't hit swap you almost never have to do
the double page-fault because of the pte change, while you would always
compute the math in the common case.
Your suggestion is nicer and make sense but I am not sure if it's
interesting for real world...
Andrea
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