I would like to clear a bunch of Xen heap pages at once (i.e. not
page-by-page).
Greatly simplifying things, let's say I grab (in common/page_alloc.c)
pg = page_list_remove_head(&heap(node, zone, order)
and then
mfn_t mfn =
_mfn(page_to_mfn(pg));
char *va = mfn_to_virt(mfn_x(mfn));
memset(va, 0, 4096 * (1 << order));
Would it be valid to this? Do I need to account for the PDX hole?
Thanks.
-boris
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