svn MFC to stable/8

Hi,

Hopefully someone familiar with svn can help. When I try to MFC
a kernel change to stable/8, it works, but I end up with tons of
mergeinfo. (It looks like every directory under sys.)

Does this matter or is there a trick to avoid this?

Thanks in advance for any help, rick
ps: I seem to MFC fine to stable/9. I only see this for stable/8.