> > Is there even a reason to have pv_compare() look at these values?  Why not
> > "sort" strictly based on the pv_entry pointers themselves, or pv->pv_pte?
> 
> Er, this can't be done right on x86, but stayed tuned...

yes, (ptp, va) pair is enough.  pmap pointer is not strictly needed here.

YAMAMOTO Takashi