this is the v4 release of the syslet/threadlet subsystem:

    http://redhat.com/~mingo/syslet-patches/

v4 is a smaller update than v3 (so i wont send out the full queue): the
threadlet API changed: the sys_async_threadlet() syscall now takes a
'completion event' pointer, and auto-completes it into the completion
ring. I've updated the test-threadlet.c code to make use of it. So
completion of threadlets and syslets is quite similar now - sharing even
more infrastructure. (To get true pthread compatibility a sys_exit()
driven CLEARTID completion method will be added too in the future).

The syslet ABI has not changed. A small performance fix was done for
syslet rescheduling.

        Ingo