Charlie Jacobsen authored Nov 28, 2015 and Vikram Narayanan committed Oct 26, 2016

The example fails right now. Michael and I will debug.

Async (THC) runtime init/exit integrated into
LCD boot/shutdown. This is working properly.

This commit also fixes a serious bug in the page allocator,
and fixes some kmalloc configuration.

As I will note on the wiki, the maximum allowed alloc size
for kmalloc is 32 pages (128 KBs). This was chosen so that
the async runtime will work (lazy stacks are about 17 pages).
There is a limit on the max size because of how I allocate
groups of pages (I use an array allocated on the stack inside
the page allocator at some point, and this array can't be
too big). In the future, we may improve on this.