From: Andi Kleen <ak@suse.de>

Patch readds the sysfs output of the NUMA API statistics.  All my test
scripts need this and it is very useful to check if the policy actually
works.

This got lost when the huge page numa api changes got dropped.

I decided to not resend the huge pages NUMA API changes for now.  Instead I
will wait for this area to settle when demand paged large pages is merged.