This patch for John the Ripper MPI implementation is a continuation of
Ryan Lim's original patch against 1.6.x, later maintained by John
Anderson at bindshell.net, and modified by AoZ and magnum.

Original announcement:

http://www.openwall.com/lists/john-users/2010/03/09/2

Update:

http://www.openwall.com/lists/john-users/2010/06/22/1

Newer revisions might be available from:

http://openwall.info/wiki/john/patches
http://openwall.info/wiki/john/parallelization#Extended-efforts