As Michael requested: a suggestion for Linux benchmarking:

I would really like to see some file system comparisons next time you
test a (stable) Linux kernel. Benchmarking Linux kernels is fine, but aside from the new features, significant performance gains are unlikely (especially when testing with games). It seems we know much less about the performance of the array of Linux file systems we have. The last good file system benchmarks I saw were fefe's: http://bulk.fefe.de/scalability/, but it seems he's ceased his testing.

I know it is difficult to control file system benchmarks in a fair way, but the guidance within fefe's extensive tests should surely get you started. I'd like to see reiserfs3, reiserfs4, ext3, ext4, xfs, jfs, and zfs in a line-up. I have lots of ideas so please reply with any questions.