I was cruising the net and I came upon this:
http://www.gossamer-threads.com/list..._view_threaded
:
This patch series adds the first running SPC-3 compliant Persistent Reservation
emulation support for PROUT REGISTER -> PROUT RESERVE -> PRIN READ_RESERVATIONS ->
PROUT RELEASE -> PROUT UNREGISTER, tested and running with Doug Gilbert's
very excellent sg_persist command. This was tested against Open/iSCSI Initiators
running LIO-Target iSCSI/TCP, and Core-iSCSI Initiators running LIO-Target iSCSI/SCTP.

I will be adding information about TCM/LIO-Target v3.0 and LIO-Target v2.9 usage wrt
Persistent Reservations on to the http://Linux-iSCSI.org wiki at some point as well,
so folks can get their own SPC-3 compliant PR enabled Linux/iSCSI Targets up and running!
I know that we lost at least one customer because we couldn't do Windows 2008 cluster.