test btrfs compress mount option

[ZomZilla]

hi,

i installed ubuntu 11.10 after spending some time with Arch and Gentoo (DIY distro sounds good but theres always something to overlook/forget)

anyways

i have BTRFS / and /home partitions (ext2 /boot) and just added compress=lzo to my fstab to see if there was a noticeable performance gain (after a few updates all the files should have been modified and therefor compressed right?)

so my options look something like this: defaults,compress=lzo,subvol=@

is there a way to test if the new mount option has taken effect?
also does anyone know of a trick to get btrfs to compress all my stuff?

thanks in advance