Benjamin Herrenschmidt wrote:

This patch changes vmemmap to use a different region (region 0xf) of the
address space whose page size can be dynamically configured at boot.

This doesn't seem to cause any problems, and users successfully used it
with the ubuntu hardy kernel, so I think it is OK to proceed with it.

  https://bugs.launchpad.net/ubuntu-ps3-port/+bug/220524

-Geoff