The fixed sized array of pages that are isolated because of 2xECC
memory errors can run out.  Increasing the size of the array is a
band-aid measure, the real fix will require changes to generic code
to add some bits to page_flags so that pages with errors can be
marked so as to prevent them ever being examined.
Signed-off-by: Russ Anderson <rja@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>