I believe the "1 1" must be "0 0" for read only filesystems.
With the default installation, the following hierarchies need to be read/write:
/root
/etc
/home
/var
/tmp
/dev
You should either make these MFS, or make appropriate adjustments. /tmp is the only one you've accounted for. You may also want to set the mode for /tmp to 1777.