Upgrading 6.4 to 7.2 with gmirror

[Kjell Bristrand]

I am about to finally go for the 7.x line, but am a little hesitant.

My concern is whether it will cause any problems to do a source upgrade from
6.4 (patched to 6.4-RELEASE-p3) to RELENG_7_2 on a gmirror install (/, /usr,
/var, and /tmp).

Can I go directly to RELENG_7_2? Would it work having / on the gmirror? Is
there anything else specific I should think about?

-- 
Kjell