Btrfs.ko

The main kernel module, it does most of th work and can take the following options by mount.

"degraded": Allow mounts of degraded "raids"
"subvol=%s": Mounts the specified subvolumen. (Default: default)
"device=%s": Scan device for btrfs.
"nodatasum": Do not checksum data.
"nodatacow": Do not use COW. Implies "nodatasum".
"nobarrier": Disable use of barriers. Barriers are used to guarantee previous data is written to disk, before following data is written. Needed for consistent journal, but bad for performance.
"max_extent=%s"
"max_inline=%s"
"alloc_start=%s": Where to start the actual fs.
"thread_pool=%d": Multithreaded.
"compress": Enable compression.
"ssd": Enable SSD allocation scheme.
"noacl": Disable POSIX ACL.