Ext3 users - Jul 2009 - resize_inode reserved space reset after offline resizing?

Hello.

Mke2fs manpage says about resize_inode option:
----
Reserve space so the block group descriptor table may grow in the
future. Useful for online resizing using resize2fs.
By default mke2fs will attempt to reserve enough space so that the
filesystem may grow to 1024 times its initial size.
This can be changed using the resize extended option.
----

So what happens after an *offline* resizing:
- Is this reserved space "regained" or recalculated in the resized
filesystem? Or...
- should I beware of a fixed "online-resizing" filesystem size limit,
set at mkfs time?

-- 
(nil)