How the Mill CPU does fork() in a single address space 11 years ago
This work of Xoring and using shared mmaps is not new and it was published in 2009 and 2010 by two separate teams. See the following papers http://dl.acm.org/citation.cfm?id=1854288 and http://dl.acm.org/citation.cfm?id=1640096
I am not sure how this can be patented.