> See http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/doc/BRANCHES for the 
> latest information.
> 
> This branch greatly reduces and simplifies the amount of machine-dependent
> code for doing lwp switching in the kernel.  A major effect of these changes
> is that will now always be a lwp active, even if that lwp is just running the
> idle loop.
> -- 
> Matt Thomas

now it's on or after April 17th.  we are going to merge the branch.
note that some ports are still known to be broken.  (see the above url.)

YAMAMOTO Takashi