KSE, libpthread & libthr: almost newbie question

[Ivan Voras]

Lev Serebryakov wrote:
> Hello ,
> 
>    I've was sure, that both libpthread and libthr use KSE to make multithreading. They use KSE in different ways: libpthread uses N:M model and libthr uses 1:1 model, but bot use KSE to work.
>    How will be possible to use these libraries (read: multithreaded programs) when KSE will be optional, on kernel without KSE?!

Yes, isn't KSE by definition "that thing that is scheduled in the kernel"?