The default options for ext3 formatting is to reserve 5% of the partition's space for usage by root, so that the admin can always log in. But 5% on today's storage devices is a fscking big space nevertheless, so it's a good practice setting the reserved space to a lower percentage of the partition space.
DO THIS ONLY ON A UNMOUNTED FILESYSTEM.
For example, to set an arbitrary percentage for reserved space on an existing ext3 filesystem:
I'm pretty convinced that Reiser4 will enter the kernel tree eventually. Perhaps it would have been already in the kernel if Reiser wouldn't have started the "kernel devs suck" discussion back then. Hmm, perhaps Reiser going to jail had nothing to do with his wife; I think the kernel devs conspired and set him up for murder...
But don't be jealous on Ext4 just because kernel devs are biased towards it.
About Reiser4. Whatever has happened has happened. Reiser is a genius, no doubt and Reiser4 is revolutionary. Never mind his quirky attitude and personal issues. Everyone has a personal life and we got to understand that.
Meanwhile, the important thing is to be constructive. There are no conspiracies. Anyone or any corporation wouldn't become a billionaire (like Bill Gates or Steve Ballmer) by pulling such a thing. People are sincerely trying to do what is best.
I know you are personally disturbed about reiser4 and as much passionate about it as Reiser himself. But you got to move on man. You are very talented and you can and you should code. You can yourself make reiser4 better, try to push it in the linux kernel (and hopefully every other OS - *interoperabilty*) and such an effort will be very very appreciable.
And it is not just about Reiser4. Look at Ext4 - they have spent years on it and I was surprised to know its just some transition file system. There is no conspiracy here either, its just for the better. There are so many efforts to make things better - Tux3, Btrfs, ZFS. Any work on any of these would be awesome.
Show them the code! And, don't let it take a toll on you. You need a bottle of beer and I wish I could get you one!