"Project Leader Paolo Mantegazza reports that a test version of RTAI-3.1 is available for download, featuring real-time support for Linux 2.4.xx and 2.6.x. The release may represent the first implementation of real-time performance in the 2.6-series kernel, according to Mantegazza.
"'Philippe did it, likely the first real time Linux-2.6,' said Mantegazza. Mantegazza earlier acknowledged XENOMAI developer Philippe Gerum's contributions to the RTAI 3.0 release..."