Btrfs Mount Option Performance Tuning On Linux 3.11

For the FIO workload there isn't a performance benefit out of any of the six Btrfs mount options that were tested. Regressing the performance for the Flexible IO Tester compared to the stock mount options were no data copy-on-write and the auto-defrag.

Zlib and LZO compression were most beneficial for the FS-Mark tasks. However, the compression support in benchmarks always isn't relevant to the real-world workloads with real data being stored rather than easily compressible zeros or other junk.