1. With shared memory creating new groups doesn't seem to work properly,
all you get in the active file is the approprate number of NUL's at the
end. I remember Linus saying he wasn't quite sure what to do when you
ran off the end of the mapping, well INN seems to want to extend it,
Linux at present doesn't.
2. It takes too long to update the active file from the copy in memory, we
seem to need an msync or the availablity of a syncronus (sp?) mapping. I
couldn't find anything that looked like msync in libc or a system call in
the kernel (although I wasn't really sure what to look for).
-- Brian