In vanilla kernel commit 1be7107fbe18eed3e319a6c3e83c78254b693acb
show_map_vma() no longer report PAGE_SIZE. Detect it with
simple test and remember in kdat settings.
Suggested-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>