threading in mesa

Hi,

I'd like to use a threaded mesa build with the osmesa driver on an Intel 
MIC. I'm exploring the possibility of it's native mode to avoid having 
to make modifications to mesa sources. A number of comments in the docs 
suggest this may not be easily achieved.

Is threading limited to 8, web docs state this but it seems low given 
recently the increasing core counts?
Does threading depend on LLVM compilers?  I think for something like MIC 
in native mode intel compilers would be necessary.

Those are my initial concerns, also curious to know if the MIC 
architecture is on Mesa developers radar?

Thanks
Burlen