shadow prefetch

Dong, Eddie
2008-01-02T06:52:41Z

Current shadow code do prefetch in FNAME(prefetch_page), but it is only
used
to choose shadow_notrap_nonpresent_pte or shadow_trap_nonpresent_pte.

At least for L1 shadow, prefetching to get exact shadow L1 pte won't
cause
performance regression (though handling time increases slightly ) since
it
won't generate a new write protected page.

for those L2+ shadow page tables, we can do similar for those pointed
gfn which
is already shadowed.

Comments?
Eddie