Native Threads in the RTS

[Simon Marlow]

> I'm still unconvinced that the  current optional
> RTS support for mixed green/native threads is the right way=20
> to go. It looks to
> me like a workaround for poor OS support for really=20
> lightweight threads.

It is a workaround for the lack of truly lightweight threads at the OS
level.  But I don't expect that situation to change, even with the
recent improvements on the Linux front.  The new RedHat Linux threads
folk claim to be able to create 10^5 threads in a couple of seconds,
whereas we can create 10^6 threads in about that time (on an old 500MHz
machine, too).

Cheers,
	Simon